/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:32:31,403 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-21 16:32:31,447 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:32:31,460 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:32:31,461 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:32:31,464 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:32:31,467 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:32:31,471 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:32:31,472 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:32:31,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:32:31,474 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:32:31,477 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:32:31,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:32:31,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:32:31,482 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:32:31,483 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:32:31,485 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:32:31,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:32:31,495 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:32:31,496 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:32:31,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:32:31,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:32:31,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 16:32:31,514 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:32:31,515 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:32:31,516 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:32:31,517 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 [2020-08-21 16:32:31,562 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:32:31,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:32:31,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:32:31,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:32:31,565 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:32:31,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:32:31,565 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:32:31,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:32:31,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:32:31,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:32:31,567 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:32:31,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:32:31,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:32:31,568 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:32:31,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:32:31,568 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:32:31,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:32:31,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:32:31,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:32:31,569 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:32:31,570 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:32:31,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:32:31,570 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:32:31,570 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:32:31,571 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:32:31,571 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:32:31,571 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:32:31,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:32:31,571 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:32:31,572 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:32:31,857 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:32:31,870 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:32:31,873 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:32:31,875 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:32:31,875 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:32:31,876 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_6.c [2020-08-21 16:32:31,956 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d6a69b6a/ce1ccd5146e3416dae2c72f0c60fa8fd/FLAGd986521a2 [2020-08-21 16:32:32,424 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:32:32,425 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_6.c [2020-08-21 16:32:32,433 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d6a69b6a/ce1ccd5146e3416dae2c72f0c60fa8fd/FLAGd986521a2 [2020-08-21 16:32:32,767 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5d6a69b6a/ce1ccd5146e3416dae2c72f0c60fa8fd [2020-08-21 16:32:32,778 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:32:32,780 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:32:32,781 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:32:32,782 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:32:32,785 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:32:32,786 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:32:32" (1/1) ... [2020-08-21 16:32:32,789 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@245d8fce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:32, skipping insertion in model container [2020-08-21 16:32:32,790 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:32:32" (1/1) ... [2020-08-21 16:32:32,798 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:32:32,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:32:33,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:32:33,022 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:32:33,048 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:32:33,063 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:32:33,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:33 WrapperNode [2020-08-21 16:32:33,064 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:32:33,065 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:32:33,065 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:32:33,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:32:33,157 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:33" (1/1) ... [2020-08-21 16:32:33,157 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:33" (1/1) ... [2020-08-21 16:32:33,162 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:33" (1/1) ... [2020-08-21 16:32:33,163 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:33" (1/1) ... [2020-08-21 16:32:33,172 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:33" (1/1) ... [2020-08-21 16:32:33,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:33" (1/1) ... [2020-08-21 16:32:33,180 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:33" (1/1) ... [2020-08-21 16:32:33,181 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:32:33,182 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:32:33,182 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:32:33,182 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:32:33,183 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:33" (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 [2020-08-21 16:32:33,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:32:33,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:32:33,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:32:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:32:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 16:32:33,249 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:32:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:32:33,250 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:32:33,480 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:32:33,481 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 16:32:33,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:32:33 BoogieIcfgContainer [2020-08-21 16:32:33,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:32:33,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:32:33,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:32:33,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:32:33,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:32:32" (1/3) ... [2020-08-21 16:32:33,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45eeb5b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:32:33, skipping insertion in model container [2020-08-21 16:32:33,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:32:33" (2/3) ... [2020-08-21 16:32:33,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45eeb5b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:32:33, skipping insertion in model container [2020-08-21 16:32:33,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:32:33" (3/3) ... [2020-08-21 16:32:33,494 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_6.c [2020-08-21 16:32:33,506 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:32:33,515 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:32:33,535 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:32:33,566 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:32:33,567 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:32:33,567 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:32:33,567 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:32:33,567 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:32:33,568 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:32:33,568 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:32:33,568 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:32:33,594 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-08-21 16:32:33,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 16:32:33,602 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:33,603 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:33,603 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:33,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:33,610 INFO L82 PathProgramCache]: Analyzing trace with hash 429652513, now seen corresponding path program 1 times [2020-08-21 16:32:33,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:33,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100364400] [2020-08-21 16:32:33,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:33,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:33,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:33,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100364400] [2020-08-21 16:32:33,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:33,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:33,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052973404] [2020-08-21 16:32:33,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:33,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:33,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:33,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:33,879 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2020-08-21 16:32:33,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:33,930 INFO L93 Difference]: Finished difference Result 63 states and 102 transitions. [2020-08-21 16:32:33,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:33,932 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 16:32:33,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:33,945 INFO L225 Difference]: With dead ends: 63 [2020-08-21 16:32:33,945 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 16:32:33,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:33,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 16:32:33,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2020-08-21 16:32:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 16:32:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 57 transitions. [2020-08-21 16:32:33,996 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 57 transitions. Word has length 16 [2020-08-21 16:32:33,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:33,997 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 57 transitions. [2020-08-21 16:32:33,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 57 transitions. [2020-08-21 16:32:33,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 16:32:33,999 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:33,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:33,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:32:34,000 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:34,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:34,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1109710883, now seen corresponding path program 1 times [2020-08-21 16:32:34,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:34,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312480521] [2020-08-21 16:32:34,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:34,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:34,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312480521] [2020-08-21 16:32:34,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:34,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:34,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449707725] [2020-08-21 16:32:34,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:34,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:34,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:34,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,073 INFO L87 Difference]: Start difference. First operand 34 states and 57 transitions. Second operand 3 states. [2020-08-21 16:32:34,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:34,098 INFO L93 Difference]: Finished difference Result 77 states and 132 transitions. [2020-08-21 16:32:34,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:34,099 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2020-08-21 16:32:34,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:34,100 INFO L225 Difference]: With dead ends: 77 [2020-08-21 16:32:34,101 INFO L226 Difference]: Without dead ends: 48 [2020-08-21 16:32:34,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-08-21 16:32:34,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2020-08-21 16:32:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 16:32:34,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 77 transitions. [2020-08-21 16:32:34,111 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 77 transitions. Word has length 16 [2020-08-21 16:32:34,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:34,112 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 77 transitions. [2020-08-21 16:32:34,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:34,112 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 77 transitions. [2020-08-21 16:32:34,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 16:32:34,113 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:34,113 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:34,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:32:34,114 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:34,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:34,115 INFO L82 PathProgramCache]: Analyzing trace with hash 434540691, now seen corresponding path program 1 times [2020-08-21 16:32:34,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:34,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242755808] [2020-08-21 16:32:34,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:34,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:34,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242755808] [2020-08-21 16:32:34,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:34,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:34,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654524044] [2020-08-21 16:32:34,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:34,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:34,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:34,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,182 INFO L87 Difference]: Start difference. First operand 46 states and 77 transitions. Second operand 3 states. [2020-08-21 16:32:34,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:34,209 INFO L93 Difference]: Finished difference Result 72 states and 117 transitions. [2020-08-21 16:32:34,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:34,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 16:32:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:34,211 INFO L225 Difference]: With dead ends: 72 [2020-08-21 16:32:34,212 INFO L226 Difference]: Without dead ends: 51 [2020-08-21 16:32:34,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-08-21 16:32:34,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2020-08-21 16:32:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-21 16:32:34,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 79 transitions. [2020-08-21 16:32:34,225 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 79 transitions. Word has length 17 [2020-08-21 16:32:34,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:34,225 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 79 transitions. [2020-08-21 16:32:34,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:34,226 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 79 transitions. [2020-08-21 16:32:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 16:32:34,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:34,229 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:34,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:32:34,230 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:34,230 INFO L82 PathProgramCache]: Analyzing trace with hash 41513681, now seen corresponding path program 1 times [2020-08-21 16:32:34,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:34,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298087400] [2020-08-21 16:32:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:34,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:34,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298087400] [2020-08-21 16:32:34,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:34,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:34,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034892314] [2020-08-21 16:32:34,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:34,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:34,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:34,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,270 INFO L87 Difference]: Start difference. First operand 49 states and 79 transitions. Second operand 3 states. [2020-08-21 16:32:34,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:34,290 INFO L93 Difference]: Finished difference Result 88 states and 144 transitions. [2020-08-21 16:32:34,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:34,291 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 16:32:34,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:34,292 INFO L225 Difference]: With dead ends: 88 [2020-08-21 16:32:34,293 INFO L226 Difference]: Without dead ends: 86 [2020-08-21 16:32:34,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-21 16:32:34,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-08-21 16:32:34,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 16:32:34,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 104 transitions. [2020-08-21 16:32:34,304 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 104 transitions. Word has length 17 [2020-08-21 16:32:34,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:34,305 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 104 transitions. [2020-08-21 16:32:34,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:34,305 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 104 transitions. [2020-08-21 16:32:34,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-08-21 16:32:34,309 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:34,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:34,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:32:34,309 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:34,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash 721572051, now seen corresponding path program 1 times [2020-08-21 16:32:34,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:34,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817767333] [2020-08-21 16:32:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:34,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:34,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817767333] [2020-08-21 16:32:34,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:34,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:34,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542286261] [2020-08-21 16:32:34,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:34,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:34,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:34,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,383 INFO L87 Difference]: Start difference. First operand 64 states and 104 transitions. Second operand 3 states. [2020-08-21 16:32:34,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:34,418 INFO L93 Difference]: Finished difference Result 144 states and 238 transitions. [2020-08-21 16:32:34,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:34,418 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-08-21 16:32:34,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:34,420 INFO L225 Difference]: With dead ends: 144 [2020-08-21 16:32:34,420 INFO L226 Difference]: Without dead ends: 88 [2020-08-21 16:32:34,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-21 16:32:34,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-08-21 16:32:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-08-21 16:32:34,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 138 transitions. [2020-08-21 16:32:34,443 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 138 transitions. Word has length 17 [2020-08-21 16:32:34,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:34,443 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 138 transitions. [2020-08-21 16:32:34,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:34,443 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 138 transitions. [2020-08-21 16:32:34,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 16:32:34,444 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:34,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:34,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:32:34,445 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:34,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1287139128, now seen corresponding path program 1 times [2020-08-21 16:32:34,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:34,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908921467] [2020-08-21 16:32:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:34,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:34,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:34,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908921467] [2020-08-21 16:32:34,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:34,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:34,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234435183] [2020-08-21 16:32:34,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:34,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:34,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:34,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,503 INFO L87 Difference]: Start difference. First operand 86 states and 138 transitions. Second operand 3 states. [2020-08-21 16:32:34,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:34,522 INFO L93 Difference]: Finished difference Result 129 states and 205 transitions. [2020-08-21 16:32:34,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:34,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 16:32:34,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:34,524 INFO L225 Difference]: With dead ends: 129 [2020-08-21 16:32:34,524 INFO L226 Difference]: Without dead ends: 90 [2020-08-21 16:32:34,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-21 16:32:34,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-08-21 16:32:34,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 16:32:34,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 138 transitions. [2020-08-21 16:32:34,536 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 138 transitions. Word has length 18 [2020-08-21 16:32:34,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:34,536 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 138 transitions. [2020-08-21 16:32:34,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:34,537 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 138 transitions. [2020-08-21 16:32:34,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 16:32:34,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:34,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:34,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:32:34,539 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:34,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:34,541 INFO L82 PathProgramCache]: Analyzing trace with hash 894112118, now seen corresponding path program 1 times [2020-08-21 16:32:34,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:34,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1946296792] [2020-08-21 16:32:34,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:34,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:34,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1946296792] [2020-08-21 16:32:34,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:34,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:34,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412929382] [2020-08-21 16:32:34,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:34,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:34,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:34,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,572 INFO L87 Difference]: Start difference. First operand 88 states and 138 transitions. Second operand 3 states. [2020-08-21 16:32:34,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:34,592 INFO L93 Difference]: Finished difference Result 156 states and 248 transitions. [2020-08-21 16:32:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:34,593 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 16:32:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:34,595 INFO L225 Difference]: With dead ends: 156 [2020-08-21 16:32:34,595 INFO L226 Difference]: Without dead ends: 154 [2020-08-21 16:32:34,596 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-08-21 16:32:34,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 120. [2020-08-21 16:32:34,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-21 16:32:34,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 186 transitions. [2020-08-21 16:32:34,612 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 186 transitions. Word has length 18 [2020-08-21 16:32:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:34,612 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 186 transitions. [2020-08-21 16:32:34,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:34,612 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 186 transitions. [2020-08-21 16:32:34,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 16:32:34,614 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:34,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:34,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:32:34,615 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:34,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:34,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1574170488, now seen corresponding path program 1 times [2020-08-21 16:32:34,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:34,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574610146] [2020-08-21 16:32:34,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:34,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:34,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574610146] [2020-08-21 16:32:34,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:34,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:34,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915974952] [2020-08-21 16:32:34,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:34,683 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:34,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:34,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,683 INFO L87 Difference]: Start difference. First operand 120 states and 186 transitions. Second operand 3 states. [2020-08-21 16:32:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:34,721 INFO L93 Difference]: Finished difference Result 272 states and 424 transitions. [2020-08-21 16:32:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:34,722 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-21 16:32:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:34,724 INFO L225 Difference]: With dead ends: 272 [2020-08-21 16:32:34,724 INFO L226 Difference]: Without dead ends: 162 [2020-08-21 16:32:34,725 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-08-21 16:32:34,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 160. [2020-08-21 16:32:34,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-21 16:32:34,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 242 transitions. [2020-08-21 16:32:34,738 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 242 transitions. Word has length 18 [2020-08-21 16:32:34,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:34,739 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 242 transitions. [2020-08-21 16:32:34,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:34,739 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 242 transitions. [2020-08-21 16:32:34,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 16:32:34,740 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:34,740 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:34,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:32:34,741 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:34,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:34,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1947887240, now seen corresponding path program 1 times [2020-08-21 16:32:34,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:34,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347384717] [2020-08-21 16:32:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:34,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:34,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347384717] [2020-08-21 16:32:34,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:34,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:34,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900312127] [2020-08-21 16:32:34,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:34,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:34,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:34,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,769 INFO L87 Difference]: Start difference. First operand 160 states and 242 transitions. Second operand 3 states. [2020-08-21 16:32:34,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:34,816 INFO L93 Difference]: Finished difference Result 240 states and 360 transitions. [2020-08-21 16:32:34,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:34,817 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 16:32:34,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:34,818 INFO L225 Difference]: With dead ends: 240 [2020-08-21 16:32:34,818 INFO L226 Difference]: Without dead ends: 166 [2020-08-21 16:32:34,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-21 16:32:34,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 164. [2020-08-21 16:32:34,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-08-21 16:32:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 242 transitions. [2020-08-21 16:32:34,848 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 242 transitions. Word has length 19 [2020-08-21 16:32:34,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:34,848 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 242 transitions. [2020-08-21 16:32:34,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:34,849 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 242 transitions. [2020-08-21 16:32:34,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 16:32:34,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:34,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:34,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 16:32:34,851 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:34,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:34,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1554860230, now seen corresponding path program 1 times [2020-08-21 16:32:34,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:34,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411138762] [2020-08-21 16:32:34,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:34,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:34,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411138762] [2020-08-21 16:32:34,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:34,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:34,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320230879] [2020-08-21 16:32:34,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:34,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:34,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:34,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,887 INFO L87 Difference]: Start difference. First operand 164 states and 242 transitions. Second operand 3 states. [2020-08-21 16:32:34,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:34,906 INFO L93 Difference]: Finished difference Result 284 states and 424 transitions. [2020-08-21 16:32:34,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:34,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 16:32:34,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:34,909 INFO L225 Difference]: With dead ends: 284 [2020-08-21 16:32:34,909 INFO L226 Difference]: Without dead ends: 282 [2020-08-21 16:32:34,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-21 16:32:34,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 232. [2020-08-21 16:32:34,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-21 16:32:34,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 334 transitions. [2020-08-21 16:32:34,922 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 334 transitions. Word has length 19 [2020-08-21 16:32:34,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:34,922 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 334 transitions. [2020-08-21 16:32:34,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:34,923 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 334 transitions. [2020-08-21 16:32:34,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 16:32:34,924 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:34,924 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:32:34,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 16:32:34,924 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:34,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:34,925 INFO L82 PathProgramCache]: Analyzing trace with hash -2060048696, now seen corresponding path program 1 times [2020-08-21 16:32:34,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:34,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205664806] [2020-08-21 16:32:34,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:34,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:34,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205664806] [2020-08-21 16:32:34,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:34,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:34,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877150889] [2020-08-21 16:32:34,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:34,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:34,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:34,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,947 INFO L87 Difference]: Start difference. First operand 232 states and 334 transitions. Second operand 3 states. [2020-08-21 16:32:34,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:34,969 INFO L93 Difference]: Finished difference Result 524 states and 752 transitions. [2020-08-21 16:32:34,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:34,970 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 16:32:34,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:34,972 INFO L225 Difference]: With dead ends: 524 [2020-08-21 16:32:34,972 INFO L226 Difference]: Without dead ends: 306 [2020-08-21 16:32:34,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:34,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-21 16:32:34,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 304. [2020-08-21 16:32:34,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-08-21 16:32:34,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 422 transitions. [2020-08-21 16:32:34,989 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 422 transitions. Word has length 19 [2020-08-21 16:32:34,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:34,989 INFO L479 AbstractCegarLoop]: Abstraction has 304 states and 422 transitions. [2020-08-21 16:32:34,989 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:34,989 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 422 transitions. [2020-08-21 16:32:34,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 16:32:34,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:34,991 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] [2020-08-21 16:32:34,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 16:32:34,991 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:34,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:34,992 INFO L82 PathProgramCache]: Analyzing trace with hash 956242573, now seen corresponding path program 1 times [2020-08-21 16:32:34,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:34,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949343567] [2020-08-21 16:32:34,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:35,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:35,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:35,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:35,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949343567] [2020-08-21 16:32:35,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:35,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:35,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973180416] [2020-08-21 16:32:35,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:35,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:35,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:35,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:35,019 INFO L87 Difference]: Start difference. First operand 304 states and 422 transitions. Second operand 3 states. [2020-08-21 16:32:35,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:35,044 INFO L93 Difference]: Finished difference Result 456 states and 628 transitions. [2020-08-21 16:32:35,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:35,044 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 16:32:35,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:35,046 INFO L225 Difference]: With dead ends: 456 [2020-08-21 16:32:35,046 INFO L226 Difference]: Without dead ends: 314 [2020-08-21 16:32:35,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:35,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-08-21 16:32:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 312. [2020-08-21 16:32:35,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-08-21 16:32:35,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 422 transitions. [2020-08-21 16:32:35,060 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 422 transitions. Word has length 20 [2020-08-21 16:32:35,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:35,060 INFO L479 AbstractCegarLoop]: Abstraction has 312 states and 422 transitions. [2020-08-21 16:32:35,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:35,061 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 422 transitions. [2020-08-21 16:32:35,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 16:32:35,062 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:35,062 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] [2020-08-21 16:32:35,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 16:32:35,063 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:35,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:35,063 INFO L82 PathProgramCache]: Analyzing trace with hash 563215563, now seen corresponding path program 1 times [2020-08-21 16:32:35,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:35,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492857968] [2020-08-21 16:32:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:35,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:35,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:35,086 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492857968] [2020-08-21 16:32:35,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:35,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:35,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067257634] [2020-08-21 16:32:35,087 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:35,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:35,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:35,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:35,088 INFO L87 Difference]: Start difference. First operand 312 states and 422 transitions. Second operand 3 states. [2020-08-21 16:32:35,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:35,108 INFO L93 Difference]: Finished difference Result 524 states and 712 transitions. [2020-08-21 16:32:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:35,109 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 16:32:35,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:35,112 INFO L225 Difference]: With dead ends: 524 [2020-08-21 16:32:35,112 INFO L226 Difference]: Without dead ends: 522 [2020-08-21 16:32:35,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-21 16:32:35,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 456. [2020-08-21 16:32:35,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-21 16:32:35,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 598 transitions. [2020-08-21 16:32:35,129 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 598 transitions. Word has length 20 [2020-08-21 16:32:35,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:35,129 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 598 transitions. [2020-08-21 16:32:35,129 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:35,129 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 598 transitions. [2020-08-21 16:32:35,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 16:32:35,130 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:35,131 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] [2020-08-21 16:32:35,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 16:32:35,131 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:35,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:35,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1243273933, now seen corresponding path program 1 times [2020-08-21 16:32:35,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:35,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129959673] [2020-08-21 16:32:35,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:35,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:35,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:35,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129959673] [2020-08-21 16:32:35,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:35,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:35,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213498929] [2020-08-21 16:32:35,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:35,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:35,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:35,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:35,159 INFO L87 Difference]: Start difference. First operand 456 states and 598 transitions. Second operand 3 states. [2020-08-21 16:32:35,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:35,189 INFO L93 Difference]: Finished difference Result 1020 states and 1320 transitions. [2020-08-21 16:32:35,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:35,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 16:32:35,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:35,193 INFO L225 Difference]: With dead ends: 1020 [2020-08-21 16:32:35,193 INFO L226 Difference]: Without dead ends: 586 [2020-08-21 16:32:35,194 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:35,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-08-21 16:32:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 584. [2020-08-21 16:32:35,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-21 16:32:35,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 726 transitions. [2020-08-21 16:32:35,215 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 726 transitions. Word has length 20 [2020-08-21 16:32:35,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:35,215 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 726 transitions. [2020-08-21 16:32:35,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:35,215 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 726 transitions. [2020-08-21 16:32:35,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 16:32:35,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:35,217 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, 1] [2020-08-21 16:32:35,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 16:32:35,217 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:35,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:35,218 INFO L82 PathProgramCache]: Analyzing trace with hash 280029309, now seen corresponding path program 1 times [2020-08-21 16:32:35,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:35,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460652101] [2020-08-21 16:32:35,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:35,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:35,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:35,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:35,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460652101] [2020-08-21 16:32:35,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:35,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:35,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056968209] [2020-08-21 16:32:35,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:35,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:35,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:35,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:35,243 INFO L87 Difference]: Start difference. First operand 584 states and 726 transitions. Second operand 3 states. [2020-08-21 16:32:35,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:35,266 INFO L93 Difference]: Finished difference Result 876 states and 1080 transitions. [2020-08-21 16:32:35,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:35,267 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 16:32:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:35,270 INFO L225 Difference]: With dead ends: 876 [2020-08-21 16:32:35,270 INFO L226 Difference]: Without dead ends: 602 [2020-08-21 16:32:35,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:35,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-08-21 16:32:35,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 600. [2020-08-21 16:32:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 600 states. [2020-08-21 16:32:35,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 726 transitions. [2020-08-21 16:32:35,291 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 726 transitions. Word has length 21 [2020-08-21 16:32:35,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:35,291 INFO L479 AbstractCegarLoop]: Abstraction has 600 states and 726 transitions. [2020-08-21 16:32:35,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:35,292 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 726 transitions. [2020-08-21 16:32:35,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 16:32:35,293 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:35,293 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, 1] [2020-08-21 16:32:35,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 16:32:35,294 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:35,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:35,294 INFO L82 PathProgramCache]: Analyzing trace with hash -112997701, now seen corresponding path program 1 times [2020-08-21 16:32:35,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:35,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1154595556] [2020-08-21 16:32:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:35,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:35,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1154595556] [2020-08-21 16:32:35,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:35,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:35,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232538652] [2020-08-21 16:32:35,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:35,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:35,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:35,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:35,317 INFO L87 Difference]: Start difference. First operand 600 states and 726 transitions. Second operand 3 states. [2020-08-21 16:32:35,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:35,349 INFO L93 Difference]: Finished difference Result 970 states and 1159 transitions. [2020-08-21 16:32:35,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:35,350 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 16:32:35,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:35,355 INFO L225 Difference]: With dead ends: 970 [2020-08-21 16:32:35,355 INFO L226 Difference]: Without dead ends: 968 [2020-08-21 16:32:35,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:35,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2020-08-21 16:32:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 904. [2020-08-21 16:32:35,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 904 states. [2020-08-21 16:32:35,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 1062 transitions. [2020-08-21 16:32:35,389 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 1062 transitions. Word has length 21 [2020-08-21 16:32:35,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:35,390 INFO L479 AbstractCegarLoop]: Abstraction has 904 states and 1062 transitions. [2020-08-21 16:32:35,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:35,390 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 1062 transitions. [2020-08-21 16:32:35,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 16:32:35,392 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:32:35,392 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, 1] [2020-08-21 16:32:35,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 16:32:35,393 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:32:35,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:32:35,393 INFO L82 PathProgramCache]: Analyzing trace with hash 567060669, now seen corresponding path program 1 times [2020-08-21 16:32:35,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:32:35,394 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119885831] [2020-08-21 16:32:35,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:32:35,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:35,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:32:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:32:35,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:32:35,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119885831] [2020-08-21 16:32:35,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:32:35,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 16:32:35,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716954439] [2020-08-21 16:32:35,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 16:32:35,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:32:35,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 16:32:35,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:35,418 INFO L87 Difference]: Start difference. First operand 904 states and 1062 transitions. Second operand 3 states. [2020-08-21 16:32:35,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:32:35,465 INFO L93 Difference]: Finished difference Result 1992 states and 2278 transitions. [2020-08-21 16:32:35,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 16:32:35,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 16:32:35,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:32:35,466 INFO L225 Difference]: With dead ends: 1992 [2020-08-21 16:32:35,466 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 16:32:35,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 16:32:35,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 16:32:35,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 16:32:35,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 16:32:35,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 16:32:35,470 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2020-08-21 16:32:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:32:35,471 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 16:32:35,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 16:32:35,471 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 16:32:35,471 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 16:32:35,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 16:32:35,475 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 16:32:35,497 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 16:32:35,498 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:32:35,498 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:32:35,498 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 16:32:35,498 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 16:32:35,498 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 16:32:35,498 INFO L268 CegarLoopResult]: For program point L93(line 93) no Hoare annotation was computed. [2020-08-21 16:32:35,499 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 107) no Hoare annotation was computed. [2020-08-21 16:32:35,499 INFO L268 CegarLoopResult]: For program point L77-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 16:32:35,499 INFO L268 CegarLoopResult]: For program point L78(line 78) no Hoare annotation was computed. [2020-08-21 16:32:35,499 INFO L271 CegarLoopResult]: At program point L103(lines 5 107) the Hoare annotation is: true [2020-08-21 16:32:35,499 INFO L268 CegarLoopResult]: For program point L29(lines 29 31) no Hoare annotation was computed. [2020-08-21 16:32:35,499 INFO L268 CegarLoopResult]: For program point L62-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 16:32:35,499 INFO L268 CegarLoopResult]: For program point L87-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 16:32:35,500 INFO L268 CegarLoopResult]: For program point L54-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 16:32:35,500 INFO L268 CegarLoopResult]: For program point L46(lines 46 48) no Hoare annotation was computed. [2020-08-21 16:32:35,500 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 107) no Hoare annotation was computed. [2020-08-21 16:32:35,500 INFO L268 CegarLoopResult]: For program point L46-2(lines 27 102) no Hoare annotation was computed. [2020-08-21 16:32:35,500 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 105) no Hoare annotation was computed. [2020-08-21 16:32:35,500 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 107) the Hoare annotation is: true [2020-08-21 16:32:35,500 INFO L268 CegarLoopResult]: For program point L88(line 88) no Hoare annotation was computed. [2020-08-21 16:32:35,501 INFO L268 CegarLoopResult]: For program point L72-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 16:32:35,501 INFO L271 CegarLoopResult]: At program point L97-1(lines 27 102) the Hoare annotation is: true [2020-08-21 16:32:35,501 INFO L268 CegarLoopResult]: For program point L73(line 73) no Hoare annotation was computed. [2020-08-21 16:32:35,501 INFO L268 CegarLoopResult]: For program point L98(line 98) no Hoare annotation was computed. [2020-08-21 16:32:35,501 INFO L264 CegarLoopResult]: At program point L98-1(lines 5 107) the Hoare annotation is: false [2020-08-21 16:32:35,501 INFO L268 CegarLoopResult]: For program point L82-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 16:32:35,501 INFO L268 CegarLoopResult]: For program point L66-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 16:32:35,502 INFO L268 CegarLoopResult]: For program point L58-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 16:32:35,502 INFO L268 CegarLoopResult]: For program point L83(line 83) no Hoare annotation was computed. [2020-08-21 16:32:35,502 INFO L268 CegarLoopResult]: For program point L50-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 16:32:35,502 INFO L268 CegarLoopResult]: For program point L92-1(lines 27 102) no Hoare annotation was computed. [2020-08-21 16:32:35,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:32:35 BoogieIcfgContainer [2020-08-21 16:32:35,515 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:32:35,518 INFO L168 Benchmark]: Toolchain (without parser) took 2737.17 ms. Allocated memory was 141.6 MB in the beginning and 243.3 MB in the end (delta: 101.7 MB). Free memory was 104.7 MB in the beginning and 203.7 MB in the end (delta: -99.0 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:35,519 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-21 16:32:35,520 INFO L168 Benchmark]: CACSL2BoogieTranslator took 282.80 ms. Allocated memory is still 141.6 MB. Free memory was 104.5 MB in the beginning and 93.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:35,521 INFO L168 Benchmark]: Boogie Preprocessor took 117.10 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 93.9 MB in the beginning and 183.7 MB in the end (delta: -89.8 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:35,522 INFO L168 Benchmark]: RCFGBuilder took 303.74 ms. Allocated memory is still 205.5 MB. Free memory was 183.1 MB in the beginning and 168.0 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:35,522 INFO L168 Benchmark]: TraceAbstraction took 2028.15 ms. Allocated memory was 205.5 MB in the beginning and 243.3 MB in the end (delta: 37.7 MB). Free memory was 167.3 MB in the beginning and 203.7 MB in the end (delta: -36.3 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-08-21 16:32:35,526 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 282.80 ms. Allocated memory is still 141.6 MB. Free memory was 104.5 MB in the beginning and 93.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.10 ms. Allocated memory was 141.6 MB in the beginning and 205.5 MB in the end (delta: 64.0 MB). Free memory was 93.9 MB in the beginning and 183.7 MB in the end (delta: -89.8 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 303.74 ms. Allocated memory is still 205.5 MB. Free memory was 183.1 MB in the beginning and 168.0 MB in the end (delta: 15.1 MB). Peak memory consumption was 15.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2028.15 ms. Allocated memory was 205.5 MB in the beginning and 243.3 MB in the end (delta: 37.7 MB). Free memory was 167.3 MB in the beginning and 203.7 MB in the end (delta: -36.3 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 105]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 17, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 923 SDtfs, 417 SDslu, 612 SDs, 0 SdLazy, 91 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 85 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=904occurred in iteration=16, 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, 17 MinimizatonAttempts, 270 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 74 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 317 NumberOfCodeBlocks, 317 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 300 ConstructedInterpolants, 0 QuantifiedInterpolants, 9690 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 17 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...