/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 21:21:10,765 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 21:21:10,769 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 21:21:10,796 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 21:21:10,796 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 21:21:10,797 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 21:21:10,799 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 21:21:10,800 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 21:21:10,802 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 21:21:10,803 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 21:21:10,804 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 21:21:10,805 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 21:21:10,806 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 21:21:10,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 21:21:10,808 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 21:21:10,809 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 21:21:10,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 21:21:10,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 21:21:10,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 21:21:10,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 21:21:10,816 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 21:21:10,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 21:21:10,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 21:21:10,819 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 21:21:10,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 21:21:10,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 21:21:10,826 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 21:21:10,827 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 21:21:10,828 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 21:21:10,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 21:21:10,829 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 21:21:10,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 21:21:10,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 21:21:10,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 21:21:10,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 21:21:10,832 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 21:21:10,833 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 21:21:10,856 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 21:21:10,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 21:21:10,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 21:21:10,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 21:21:10,858 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 21:21:10,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 21:21:10,859 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 21:21:10,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 21:21:10,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 21:21:10,860 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 21:21:10,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 21:21:10,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 21:21:10,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 21:21:10,860 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 21:21:10,861 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 21:21:10,861 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 21:21:10,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 21:21:10,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 21:21:10,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 21:21:10,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 21:21:10,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 21:21:10,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 21:21:10,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 21:21:10,863 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 21:21:10,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 21:21:10,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 21:21:10,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 21:21:10,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 21:21:10,864 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 21:21:10,864 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=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true; [2020-08-21 21:21:11,140 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 21:21:11,152 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 21:21:11,156 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 21:21:11,158 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 21:21:11,159 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 21:21:11,159 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-08-21 21:21:11,235 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dbb9ddf3/2cebcfa63c0f4b6eb2f3ad5f60a0060b/FLAGcb2b40b91 [2020-08-21 21:21:11,757 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 21:21:11,757 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_4-1.c [2020-08-21 21:21:11,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dbb9ddf3/2cebcfa63c0f4b6eb2f3ad5f60a0060b/FLAGcb2b40b91 [2020-08-21 21:21:12,116 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3dbb9ddf3/2cebcfa63c0f4b6eb2f3ad5f60a0060b [2020-08-21 21:21:12,129 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 21:21:12,132 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 21:21:12,133 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 21:21:12,133 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 21:21:12,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 21:21:12,138 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:21:12" (1/1) ... [2020-08-21 21:21:12,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5728a2e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:12, skipping insertion in model container [2020-08-21 21:21:12,142 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 09:21:12" (1/1) ... [2020-08-21 21:21:12,150 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 21:21:12,171 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 21:21:12,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:21:12,345 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 21:21:12,364 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 21:21:12,380 INFO L208 MainTranslator]: Completed translation [2020-08-21 21:21:12,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:12 WrapperNode [2020-08-21 21:21:12,381 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 21:21:12,382 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 21:21:12,382 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 21:21:12,382 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 21:21:12,397 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:12" (1/1) ... [2020-08-21 21:21:12,397 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:12" (1/1) ... [2020-08-21 21:21:12,485 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:12" (1/1) ... [2020-08-21 21:21:12,485 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:12" (1/1) ... [2020-08-21 21:21:12,489 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:12" (1/1) ... [2020-08-21 21:21:12,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:12" (1/1) ... [2020-08-21 21:21:12,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:12" (1/1) ... [2020-08-21 21:21:12,495 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 21:21:12,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 21:21:12,496 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 21:21:12,496 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 21:21:12,497 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:12" (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 21:21:12,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 21:21:12,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 21:21:12,570 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-21 21:21:12,570 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-21 21:21:12,570 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 21:21:12,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 21:21:12,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 21:21:12,571 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-21 21:21:12,571 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-21 21:21:12,571 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 21:21:12,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 21:21:12,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 21:21:12,793 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 21:21:12,793 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 21:21:12,797 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:21:12 BoogieIcfgContainer [2020-08-21 21:21:12,798 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 21:21:12,799 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 21:21:12,799 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 21:21:12,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 21:21:12,803 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 09:21:12" (1/3) ... [2020-08-21 21:21:12,804 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65272bfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:21:12, skipping insertion in model container [2020-08-21 21:21:12,804 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 09:21:12" (2/3) ... [2020-08-21 21:21:12,805 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65272bfe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 09:21:12, skipping insertion in model container [2020-08-21 21:21:12,805 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 09:21:12" (3/3) ... [2020-08-21 21:21:12,807 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2020-08-21 21:21:12,819 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 21:21:12,827 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 21:21:12,844 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 21:21:12,900 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 21:21:12,900 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 21:21:12,901 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 21:21:12,901 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 21:21:12,901 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 21:21:12,901 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 21:21:12,901 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 21:21:12,901 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 21:21:12,927 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-21 21:21:12,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 21:21:12,938 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:12,939 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:12,940 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:12,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:12,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-21 21:21:12,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:12,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324941398] [2020-08-21 21:21:12,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:13,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:13,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:13,167 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 21:21:13,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324941398] [2020-08-21 21:21:13,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:21:13,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:21:13,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798732158] [2020-08-21 21:21:13,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:21:13,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:13,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:21:13,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:21:13,191 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-21 21:21:13,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:13,302 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-21 21:21:13,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:21:13,304 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 21:21:13,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:13,316 INFO L225 Difference]: With dead ends: 44 [2020-08-21 21:21:13,317 INFO L226 Difference]: Without dead ends: 30 [2020-08-21 21:21:13,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:21:13,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-21 21:21:13,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-21 21:21:13,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 21:21:13,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 21:21:13,370 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-21 21:21:13,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:13,371 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 21:21:13,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:21:13,371 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 21:21:13,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 21:21:13,373 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:13,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:13,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 21:21:13,374 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:13,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:13,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-21 21:21:13,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:13,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464183868] [2020-08-21 21:21:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:13,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:13,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:13,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:13,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:13,446 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 21:21:13,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464183868] [2020-08-21 21:21:13,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 21:21:13,448 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 21:21:13,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468526862] [2020-08-21 21:21:13,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 21:21:13,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:13,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 21:21:13,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 21:21:13,451 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-21 21:21:13,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:13,523 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-21 21:21:13,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 21:21:13,524 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-21 21:21:13,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:13,525 INFO L225 Difference]: With dead ends: 36 [2020-08-21 21:21:13,526 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 21:21:13,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:21:13,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 21:21:13,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 21:21:13,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 21:21:13,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-21 21:21:13,537 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-21 21:21:13,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:13,538 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-21 21:21:13,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 21:21:13,538 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-21 21:21:13,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 21:21:13,540 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:13,540 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:13,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 21:21:13,541 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:13,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:13,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-21 21:21:13,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:13,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204521169] [2020-08-21 21:21:13,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:13,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:13,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:13,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:13,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:13,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:13,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:21:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:21:13,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204521169] [2020-08-21 21:21:13,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:13,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:21:13,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801513545] [2020-08-21 21:21:13,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:21:13,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:13,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:21:13,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:21:13,697 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-21 21:21:13,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:13,790 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-21 21:21:13,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 21:21:13,791 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-21 21:21:13,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:13,793 INFO L225 Difference]: With dead ends: 58 [2020-08-21 21:21:13,793 INFO L226 Difference]: Without dead ends: 34 [2020-08-21 21:21:13,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:21:13,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-21 21:21:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-21 21:21:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 21:21:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-21 21:21:13,805 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-21 21:21:13,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:13,805 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-21 21:21:13,805 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:21:13,806 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-21 21:21:13,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 21:21:13,807 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:13,808 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:13,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 21:21:13,808 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:13,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:13,809 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-21 21:21:13,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:13,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131396209] [2020-08-21 21:21:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:13,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:13,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:13,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:13,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:13,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:13,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:13,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:13,989 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 21:21:13,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131396209] [2020-08-21 21:21:13,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:13,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:21:13,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882219494] [2020-08-21 21:21:13,992 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:21:13,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:13,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:21:13,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:21:13,996 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-21 21:21:14,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:14,185 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-21 21:21:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:21:14,186 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-21 21:21:14,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:14,190 INFO L225 Difference]: With dead ends: 54 [2020-08-21 21:21:14,190 INFO L226 Difference]: Without dead ends: 50 [2020-08-21 21:21:14,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 21:21:14,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-21 21:21:14,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-21 21:21:14,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-21 21:21:14,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-21 21:21:14,205 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-21 21:21:14,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:14,205 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-21 21:21:14,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:21:14,206 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-21 21:21:14,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-21 21:21:14,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:14,208 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:14,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 21:21:14,209 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:14,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:14,209 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-21 21:21:14,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:14,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106693260] [2020-08-21 21:21:14,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:14,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:14,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:14,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-21 21:21:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-21 21:21:14,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 21:21:14,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106693260] [2020-08-21 21:21:14,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:14,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 21:21:14,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042846787] [2020-08-21 21:21:14,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 21:21:14,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:14,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 21:21:14,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 21:21:14,339 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-21 21:21:14,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:14,440 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-21 21:21:14,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 21:21:14,443 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-21 21:21:14,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:14,445 INFO L225 Difference]: With dead ends: 94 [2020-08-21 21:21:14,446 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 21:21:14,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:21:14,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 21:21:14,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-21 21:21:14,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-21 21:21:14,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-21 21:21:14,479 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-21 21:21:14,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:14,479 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-21 21:21:14,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 21:21:14,480 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-21 21:21:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 21:21:14,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:14,484 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:14,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 21:21:14,484 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:14,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-21 21:21:14,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:14,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981055885] [2020-08-21 21:21:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:14,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:14,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:14,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,636 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-21 21:21:14,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981055885] [2020-08-21 21:21:14,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:14,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 21:21:14,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438521584] [2020-08-21 21:21:14,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:21:14,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:14,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:21:14,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:21:14,639 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-21 21:21:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:14,753 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-21 21:21:14,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 21:21:14,754 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-21 21:21:14,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:14,756 INFO L225 Difference]: With dead ends: 103 [2020-08-21 21:21:14,757 INFO L226 Difference]: Without dead ends: 57 [2020-08-21 21:21:14,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:21:14,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-21 21:21:14,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-21 21:21:14,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 21:21:14,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-21 21:21:14,770 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-21 21:21:14,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:14,771 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-21 21:21:14,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:21:14,771 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-21 21:21:14,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 21:21:14,774 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:14,774 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:14,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 21:21:14,774 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:14,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:14,775 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-21 21:21:14,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:14,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1373029838] [2020-08-21 21:21:14,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:14,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:14,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:14,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:14,960 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-21 21:21:14,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1373029838] [2020-08-21 21:21:14,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:14,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 21:21:14,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871048392] [2020-08-21 21:21:14,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:21:14,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:14,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:21:14,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:21:14,967 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-21 21:21:15,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:15,193 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-21 21:21:15,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 21:21:15,194 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-21 21:21:15,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:15,196 INFO L225 Difference]: With dead ends: 86 [2020-08-21 21:21:15,197 INFO L226 Difference]: Without dead ends: 82 [2020-08-21 21:21:15,198 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 21:21:15,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-21 21:21:15,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-21 21:21:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 21:21:15,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-21 21:21:15,215 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-21 21:21:15,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:15,216 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-21 21:21:15,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:21:15,216 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-21 21:21:15,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-21 21:21:15,219 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:15,219 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:15,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 21:21:15,220 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:15,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:15,220 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-21 21:21:15,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:15,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438431121] [2020-08-21 21:21:15,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:15,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:15,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:15,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:15,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:15,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-21 21:21:15,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,412 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-21 21:21:15,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438431121] [2020-08-21 21:21:15,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:15,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 21:21:15,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772746966] [2020-08-21 21:21:15,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 21:21:15,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:15,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 21:21:15,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 21:21:15,415 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-21 21:21:15,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:15,566 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-21 21:21:15,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:21:15,567 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-21 21:21:15,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:15,569 INFO L225 Difference]: With dead ends: 167 [2020-08-21 21:21:15,569 INFO L226 Difference]: Without dead ends: 94 [2020-08-21 21:21:15,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:21:15,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-21 21:21:15,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-21 21:21:15,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 21:21:15,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-21 21:21:15,599 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-21 21:21:15,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:15,602 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-21 21:21:15,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 21:21:15,602 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-21 21:21:15,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 21:21:15,604 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:15,604 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:15,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 21:21:15,605 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:15,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:15,605 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-21 21:21:15,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:15,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645627712] [2020-08-21 21:21:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:15,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:21:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 21:21:15,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645627712] [2020-08-21 21:21:15,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:15,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 21:21:15,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159155598] [2020-08-21 21:21:15,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:21:15,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:15,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:21:15,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:21:15,758 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-21 21:21:16,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:16,020 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-21 21:21:16,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:21:16,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-21 21:21:16,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:16,026 INFO L225 Difference]: With dead ends: 188 [2020-08-21 21:21:16,026 INFO L226 Difference]: Without dead ends: 109 [2020-08-21 21:21:16,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:21:16,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-21 21:21:16,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-21 21:21:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-21 21:21:16,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-21 21:21:16,075 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-21 21:21:16,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:16,076 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-21 21:21:16,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:21:16,077 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-21 21:21:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-21 21:21:16,082 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:16,082 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:16,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 21:21:16,083 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:16,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:16,084 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-21 21:21:16,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:16,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972057729] [2020-08-21 21:21:16,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:16,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:16,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:16,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:16,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:16,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:16,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:16,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:16,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:16,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:16,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:16,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:16,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:16,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:21:16,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:16,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:16,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:16,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:16,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:16,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:16,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:16,461 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-21 21:21:16,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972057729] [2020-08-21 21:21:16,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:16,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 21:21:16,463 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478162354] [2020-08-21 21:21:16,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 21:21:16,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:16,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 21:21:16,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-21 21:21:16,466 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-21 21:21:16,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:16,852 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-21 21:21:16,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 21:21:16,852 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-21 21:21:16,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:16,855 INFO L225 Difference]: With dead ends: 199 [2020-08-21 21:21:16,855 INFO L226 Difference]: Without dead ends: 86 [2020-08-21 21:21:16,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-08-21 21:21:16,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-21 21:21:16,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2020-08-21 21:21:16,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 21:21:16,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 100 transitions. [2020-08-21 21:21:16,868 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 100 transitions. Word has length 82 [2020-08-21 21:21:16,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:16,868 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 100 transitions. [2020-08-21 21:21:16,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 21:21:16,868 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 100 transitions. [2020-08-21 21:21:16,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-21 21:21:16,870 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:16,870 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:16,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 21:21:16,871 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:16,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:16,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1156896337, now seen corresponding path program 1 times [2020-08-21 21:21:16,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:16,872 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056872927] [2020-08-21 21:21:16,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:16,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:16,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:16,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:16,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:17,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:17,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:21:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:17,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-08-21 21:21:17,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056872927] [2020-08-21 21:21:17,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:17,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 21:21:17,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68336927] [2020-08-21 21:21:17,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 21:21:17,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:17,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 21:21:17,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-21 21:21:17,261 INFO L87 Difference]: Start difference. First operand 76 states and 100 transitions. Second operand 17 states. [2020-08-21 21:21:17,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:17,497 INFO L93 Difference]: Finished difference Result 96 states and 126 transitions. [2020-08-21 21:21:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 21:21:17,498 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 68 [2020-08-21 21:21:17,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:17,499 INFO L225 Difference]: With dead ends: 96 [2020-08-21 21:21:17,500 INFO L226 Difference]: Without dead ends: 92 [2020-08-21 21:21:17,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-08-21 21:21:17,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-21 21:21:17,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-08-21 21:21:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 21:21:17,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 107 transitions. [2020-08-21 21:21:17,515 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 107 transitions. Word has length 68 [2020-08-21 21:21:17,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:17,516 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 107 transitions. [2020-08-21 21:21:17,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 21:21:17,516 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 107 transitions. [2020-08-21 21:21:17,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 21:21:17,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:17,518 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:17,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 21:21:17,518 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:17,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:17,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1711191765, now seen corresponding path program 2 times [2020-08-21 21:21:17,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:17,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [891298348] [2020-08-21 21:21:17,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:17,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:17,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:17,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-21 21:21:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-21 21:21:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,617 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 16 proven. 22 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-08-21 21:21:17,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [891298348] [2020-08-21 21:21:17,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:17,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 21:21:17,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701483110] [2020-08-21 21:21:17,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 21:21:17,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:17,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 21:21:17,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 21:21:17,620 INFO L87 Difference]: Start difference. First operand 81 states and 107 transitions. Second operand 7 states. [2020-08-21 21:21:17,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:17,703 INFO L93 Difference]: Finished difference Result 143 states and 199 transitions. [2020-08-21 21:21:17,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 21:21:17,704 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-08-21 21:21:17,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:17,706 INFO L225 Difference]: With dead ends: 143 [2020-08-21 21:21:17,706 INFO L226 Difference]: Without dead ends: 70 [2020-08-21 21:21:17,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:21:17,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-21 21:21:17,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-21 21:21:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 21:21:17,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2020-08-21 21:21:17,714 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 69 [2020-08-21 21:21:17,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:17,714 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2020-08-21 21:21:17,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 21:21:17,715 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2020-08-21 21:21:17,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-21 21:21:17,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:17,716 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:17,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 21:21:17,717 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:17,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:17,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 3 times [2020-08-21 21:21:17,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:17,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882655281] [2020-08-21 21:21:17,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:17,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:17,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:17,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:17,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:17,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:21:17,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 21:21:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:17,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:17,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:17,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:18,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:21:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,037 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-08-21 21:21:18,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882655281] [2020-08-21 21:21:18,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:18,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 21:21:18,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815228072] [2020-08-21 21:21:18,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:21:18,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:18,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:21:18,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:21:18,040 INFO L87 Difference]: Start difference. First operand 70 states and 90 transitions. Second operand 10 states. [2020-08-21 21:21:18,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:18,220 INFO L93 Difference]: Finished difference Result 131 states and 175 transitions. [2020-08-21 21:21:18,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 21:21:18,221 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-21 21:21:18,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:18,222 INFO L225 Difference]: With dead ends: 131 [2020-08-21 21:21:18,223 INFO L226 Difference]: Without dead ends: 70 [2020-08-21 21:21:18,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:21:18,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-21 21:21:18,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-08-21 21:21:18,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 21:21:18,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 89 transitions. [2020-08-21 21:21:18,235 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 89 transitions. Word has length 110 [2020-08-21 21:21:18,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:18,236 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 89 transitions. [2020-08-21 21:21:18,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:21:18,237 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 89 transitions. [2020-08-21 21:21:18,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-08-21 21:21:18,239 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 21:21:18,240 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 8, 7, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 21:21:18,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 21:21:18,240 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 21:21:18,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 21:21:18,240 INFO L82 PathProgramCache]: Analyzing trace with hash 2011292190, now seen corresponding path program 2 times [2020-08-21 21:21:18,241 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 21:21:18,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873129806] [2020-08-21 21:21:18,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 21:21:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 21:21:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 21:21:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:18,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:21:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:18,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:18,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-21 21:21:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:18,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:18,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 21:21:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 21:21:18,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-21 21:21:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-21 21:21:18,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 21:21:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 437 backedges. 40 proven. 124 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2020-08-21 21:21:18,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873129806] [2020-08-21 21:21:18,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 21:21:18,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 21:21:18,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820767473] [2020-08-21 21:21:18,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 21:21:18,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 21:21:18,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 21:21:18,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-08-21 21:21:18,616 INFO L87 Difference]: Start difference. First operand 70 states and 89 transitions. Second operand 10 states. [2020-08-21 21:21:18,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 21:21:18,807 INFO L93 Difference]: Finished difference Result 77 states and 96 transitions. [2020-08-21 21:21:18,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 21:21:18,807 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 136 [2020-08-21 21:21:18,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 21:21:18,808 INFO L225 Difference]: With dead ends: 77 [2020-08-21 21:21:18,808 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 21:21:18,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2020-08-21 21:21:18,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 21:21:18,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 21:21:18,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 21:21:18,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 21:21:18,810 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 136 [2020-08-21 21:21:18,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 21:21:18,810 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 21:21:18,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 21:21:18,811 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 21:21:18,811 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 21:21:18,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 21:21:18,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 21:21:19,231 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 15 [2020-08-21 21:21:19,433 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2020-08-21 21:21:19,437 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 21:21:19,438 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 21:21:19,438 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 21:21:19,438 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 21:21:19,438 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 21:21:19,438 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 21:21:19,438 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 39) no Hoare annotation was computed. [2020-08-21 21:21:19,438 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 35 42) the Hoare annotation is: true [2020-08-21 21:21:19,439 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 35 42) no Hoare annotation was computed. [2020-08-21 21:21:19,439 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 35 42) no Hoare annotation was computed. [2020-08-21 21:21:19,439 INFO L268 CegarLoopResult]: For program point L39(line 39) no Hoare annotation was computed. [2020-08-21 21:21:19,439 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-21 21:21:19,440 INFO L264 CegarLoopResult]: At program point L37(line 37) the Hoare annotation is: (and (<= 4 main_~x~0) (<= main_~x~0 4)) [2020-08-21 21:21:19,440 INFO L268 CegarLoopResult]: For program point L37-1(line 37) no Hoare annotation was computed. [2020-08-21 21:21:19,440 INFO L268 CegarLoopResult]: For program point L38-2(lines 38 40) no Hoare annotation was computed. [2020-08-21 21:21:19,440 INFO L271 CegarLoopResult]: At program point fibo2ENTRY(lines 17 25) the Hoare annotation is: true [2020-08-21 21:21:19,441 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (and (= fibo2_~n |fibo2_#in~n|) (not (<= |fibo2_#in~n| 1))) [2020-08-21 21:21:19,441 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-21 21:21:19,442 INFO L264 CegarLoopResult]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse0 (= fibo2_~n |fibo2_#in~n|))) (or (and (<= |fibo2_#t~ret2| 1) .cse0 (<= 1 |fibo2_#t~ret2|) (<= 2 |fibo2_#in~n|) (<= |fibo2_#in~n| 2)) (and (<= 4 fibo2_~n) .cse0))) [2020-08-21 21:21:19,442 INFO L268 CegarLoopResult]: For program point L20(lines 20 24) no Hoare annotation was computed. [2020-08-21 21:21:19,442 INFO L268 CegarLoopResult]: For program point L23-3(line 23) no Hoare annotation was computed. [2020-08-21 21:21:19,442 INFO L268 CegarLoopResult]: For program point L18(lines 18 24) no Hoare annotation was computed. [2020-08-21 21:21:19,442 INFO L268 CegarLoopResult]: For program point fibo2FINAL(lines 17 25) no Hoare annotation was computed. [2020-08-21 21:21:19,443 INFO L268 CegarLoopResult]: For program point fibo2EXIT(lines 17 25) no Hoare annotation was computed. [2020-08-21 21:21:19,443 INFO L271 CegarLoopResult]: At program point fibo1ENTRY(lines 7 15) the Hoare annotation is: true [2020-08-21 21:21:19,443 INFO L264 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (not (<= |fibo1_#in~n| 2)) (= fibo1_~n |fibo1_#in~n|)) [2020-08-21 21:21:19,443 INFO L268 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-08-21 21:21:19,443 INFO L264 CegarLoopResult]: At program point L13-2(line 13) the Hoare annotation is: (and (let ((.cse0 (= fibo1_~n |fibo1_#in~n|))) (or (and (<= |fibo1_#in~n| 3) .cse0) (and (<= 2 |fibo1_#t~ret0|) (<= |fibo1_#t~ret0| 2) .cse0) (and (<= 5 |fibo1_#in~n|) .cse0))) (not (<= |fibo1_#in~n| 2)) (or (and (<= |fibo1_#t~ret0| 1) (<= 1 |fibo1_#t~ret0|)) (<= 4 fibo1_~n))) [2020-08-21 21:21:19,444 INFO L268 CegarLoopResult]: For program point fibo1FINAL(lines 7 15) no Hoare annotation was computed. [2020-08-21 21:21:19,444 INFO L268 CegarLoopResult]: For program point L10(lines 10 14) no Hoare annotation was computed. [2020-08-21 21:21:19,444 INFO L268 CegarLoopResult]: For program point L13-3(line 13) no Hoare annotation was computed. [2020-08-21 21:21:19,444 INFO L268 CegarLoopResult]: For program point L8(lines 8 14) no Hoare annotation was computed. [2020-08-21 21:21:19,444 INFO L268 CegarLoopResult]: For program point fibo1EXIT(lines 7 15) no Hoare annotation was computed. [2020-08-21 21:21:19,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 09:21:19 BoogieIcfgContainer [2020-08-21 21:21:19,453 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 21:21:19,456 INFO L168 Benchmark]: Toolchain (without parser) took 7324.22 ms. Allocated memory was 139.5 MB in the beginning and 314.0 MB in the end (delta: 174.6 MB). Free memory was 102.0 MB in the beginning and 156.0 MB in the end (delta: -54.0 MB). Peak memory consumption was 120.6 MB. Max. memory is 7.1 GB. [2020-08-21 21:21:19,457 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 21:21:19,458 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.35 ms. Allocated memory is still 139.5 MB. Free memory was 101.8 MB in the beginning and 92.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-21 21:21:19,463 INFO L168 Benchmark]: Boogie Preprocessor took 113.57 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.1 MB in the beginning and 180.4 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-21 21:21:19,468 INFO L168 Benchmark]: RCFGBuilder took 302.48 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 167.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 21:21:19,471 INFO L168 Benchmark]: TraceAbstraction took 6654.34 ms. Allocated memory was 202.4 MB in the beginning and 314.0 MB in the end (delta: 111.7 MB). Free memory was 166.8 MB in the beginning and 156.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 122.5 MB. Max. memory is 7.1 GB. [2020-08-21 21:21:19,477 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.35 ms. Allocated memory is still 139.5 MB. Free memory was 101.8 MB in the beginning and 92.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.57 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 92.1 MB in the beginning and 180.4 MB in the end (delta: -88.3 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 302.48 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 167.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6654.34 ms. Allocated memory was 202.4 MB in the beginning and 314.0 MB in the end (delta: 111.7 MB). Free memory was 166.8 MB in the beginning and 156.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 122.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 39]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 5.9s, OverallIterations: 14, TraceHistogramMax: 10, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 436 SDtfs, 293 SDslu, 2109 SDs, 0 SdLazy, 1554 SolverSat, 154 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 405 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=100occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 14 MinimizatonAttempts, 48 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 344 PreInvPairs, 398 NumberOfFragments, 94 HoareAnnotationTreeSize, 344 FomulaSimplifications, 448 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 11 FomulaSimplificationsInter, 770 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 774 NumberOfCodeBlocks, 774 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 760 ConstructedInterpolants, 0 QuantifiedInterpolants, 103564 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 816/1159 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...