/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:47:48,760 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:47:48,762 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:47:48,785 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:47:48,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:47:48,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:47:48,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:47:48,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:47:48,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:47:48,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:47:48,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:47:48,793 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:47:48,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:47:48,795 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:47:48,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:47:48,797 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:47:48,798 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:47:48,798 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:47:48,800 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:47:48,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:47:48,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:47:48,804 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:47:48,805 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:47:48,805 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:47:48,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 06:47:48,808 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 06:47:48,808 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 06:47:48,809 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 06:47:48,809 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 06:47:48,810 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 06:47:48,810 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 06:47:48,811 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 06:47:48,812 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 06:47:48,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 06:47:48,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 06:47:48,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 06:47:48,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 06:47:48,814 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 06:47:48,814 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:47:48,815 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:47:48,816 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:47:48,817 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 [2020-08-19 06:47:48,839 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:47:48,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:47:48,840 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:47:48,841 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:47:48,841 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:47:48,841 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:47:48,841 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:47:48,841 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:47:48,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:47:48,842 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:47:48,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:47:48,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:47:48,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:47:48,842 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:47:48,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:47:48,843 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:47:48,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:47:48,843 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:47:48,843 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:47:48,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:47:48,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:47:48,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:47:48,844 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:47:48,844 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:47:48,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:47:48,845 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:47:48,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:47:48,845 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:47:48,845 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:47:48,845 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=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:47:49,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:47:49,162 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:47:49,165 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:47:49,168 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:47:49,170 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:47:49,170 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2020-08-19 06:47:49,251 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51b307c39/b8201e11b19848149da9fafb1a217357/FLAG32981e5de [2020-08-19 06:47:49,693 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:47:49,694 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/fibo_2calls_5-2.c [2020-08-19 06:47:49,700 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51b307c39/b8201e11b19848149da9fafb1a217357/FLAG32981e5de [2020-08-19 06:47:50,130 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/51b307c39/b8201e11b19848149da9fafb1a217357 [2020-08-19 06:47:50,142 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:47:50,144 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:47:50,145 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:47:50,145 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:47:50,148 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:47:50,149 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:47:50" (1/1) ... [2020-08-19 06:47:50,152 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a80087b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:50, skipping insertion in model container [2020-08-19 06:47:50,152 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:47:50" (1/1) ... [2020-08-19 06:47:50,160 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:47:50,180 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:47:50,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:47:50,374 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:47:50,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:47:50,403 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:47:50,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:50 WrapperNode [2020-08-19 06:47:50,404 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:47:50,404 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:47:50,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:47:50,405 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:47:50,414 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:50" (1/1) ... [2020-08-19 06:47:50,414 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:50" (1/1) ... [2020-08-19 06:47:50,496 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:50" (1/1) ... [2020-08-19 06:47:50,497 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:50" (1/1) ... [2020-08-19 06:47:50,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:50" (1/1) ... [2020-08-19 06:47:50,507 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:50" (1/1) ... [2020-08-19 06:47:50,508 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:50" (1/1) ... [2020-08-19 06:47:50,509 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:47:50,510 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:47:50,510 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:47:50,510 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:47:50,511 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:50" (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 [2020-08-19 06:47:50,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:47:50,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:47:50,574 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2020-08-19 06:47:50,574 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2020-08-19 06:47:50,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:47:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 06:47:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:47:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2020-08-19 06:47:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2020-08-19 06:47:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:47:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:47:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:47:50,766 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:47:50,767 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 06:47:50,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:47:50 BoogieIcfgContainer [2020-08-19 06:47:50,771 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:47:50,772 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:47:50,772 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:47:50,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:47:50,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:47:50" (1/3) ... [2020-08-19 06:47:50,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e5b3c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:47:50, skipping insertion in model container [2020-08-19 06:47:50,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:47:50" (2/3) ... [2020-08-19 06:47:50,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e5b3c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:47:50, skipping insertion in model container [2020-08-19 06:47:50,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:47:50" (3/3) ... [2020-08-19 06:47:50,779 INFO L109 eAbstractionObserver]: Analyzing ICFG fibo_2calls_5-2.c [2020-08-19 06:47:50,790 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:47:50,800 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:47:50,818 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:47:50,873 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:47:50,873 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:47:50,874 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:47:50,874 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:47:50,874 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:47:50,874 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:47:50,874 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:47:50,874 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:47:50,896 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-19 06:47:50,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 06:47:50,902 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:50,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:50,904 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:50,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:50,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1464461757, now seen corresponding path program 1 times [2020-08-19 06:47:50,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:50,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146887674] [2020-08-19 06:47:50,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:51,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:51,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:51,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:51,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:51,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:51,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:47:51,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146887674] [2020-08-19 06:47:51,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:47:51,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:47:51,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83394933] [2020-08-19 06:47:51,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:47:51,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:51,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:47:51,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:47:51,133 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 5 states. [2020-08-19 06:47:51,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:51,239 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2020-08-19 06:47:51,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:47:51,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 06:47:51,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:51,251 INFO L225 Difference]: With dead ends: 44 [2020-08-19 06:47:51,251 INFO L226 Difference]: Without dead ends: 30 [2020-08-19 06:47:51,255 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 [2020-08-19 06:47:51,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-19 06:47:51,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-08-19 06:47:51,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 06:47:51,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-19 06:47:51,298 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2020-08-19 06:47:51,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:51,298 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-19 06:47:51,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:47:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-19 06:47:51,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 06:47:51,300 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:51,300 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:51,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:47:51,301 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:51,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:51,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1134800479, now seen corresponding path program 1 times [2020-08-19 06:47:51,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:51,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901750245] [2020-08-19 06:47:51,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:51,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:51,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:51,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:51,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:51,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:51,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 06:47:51,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901750245] [2020-08-19 06:47:51,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:47:51,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 06:47:51,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927304530] [2020-08-19 06:47:51,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:47:51,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:51,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:47:51,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:47:51,371 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 5 states. [2020-08-19 06:47:51,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:51,435 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-08-19 06:47:51,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:47:51,436 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-19 06:47:51,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:51,438 INFO L225 Difference]: With dead ends: 36 [2020-08-19 06:47:51,438 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 06:47:51,439 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 [2020-08-19 06:47:51,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 06:47:51,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-19 06:47:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 06:47:51,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2020-08-19 06:47:51,451 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2020-08-19 06:47:51,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:51,452 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2020-08-19 06:47:51,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:47:51,452 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2020-08-19 06:47:51,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-19 06:47:51,454 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:51,455 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] [2020-08-19 06:47:51,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:47:51,455 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:51,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:51,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1592795560, now seen corresponding path program 1 times [2020-08-19 06:47:51,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:51,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [941680319] [2020-08-19 06:47:51,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:51,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:51,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:51,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:51,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:51,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:51,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:51,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 06:47:51,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:51,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 06:47:51,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [941680319] [2020-08-19 06:47:51,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:51,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:47:51,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458977211] [2020-08-19 06:47:51,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:47:51,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:51,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:47:51,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:47:51,646 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand 7 states. [2020-08-19 06:47:51,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:51,725 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2020-08-19 06:47:51,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:47:51,726 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-08-19 06:47:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:51,728 INFO L225 Difference]: With dead ends: 58 [2020-08-19 06:47:51,728 INFO L226 Difference]: Without dead ends: 34 [2020-08-19 06:47:51,730 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 [2020-08-19 06:47:51,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-19 06:47:51,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-08-19 06:47:51,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-19 06:47:51,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-08-19 06:47:51,739 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2020-08-19 06:47:51,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:51,740 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-08-19 06:47:51,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:47:51,740 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-08-19 06:47:51,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 06:47:51,742 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:51,743 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] [2020-08-19 06:47:51,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:47:51,743 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:51,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:51,744 INFO L82 PathProgramCache]: Analyzing trace with hash 746633022, now seen corresponding path program 1 times [2020-08-19 06:47:51,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:51,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942005750] [2020-08-19 06:47:51,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:51,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:51,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:51,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:51,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:51,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:51,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:51,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 06:47:51,871 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942005750] [2020-08-19 06:47:51,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:51,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:47:51,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620317585] [2020-08-19 06:47:51,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:47:51,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:51,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:47:51,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:47:51,874 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 7 states. [2020-08-19 06:47:52,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:52,059 INFO L93 Difference]: Finished difference Result 54 states and 74 transitions. [2020-08-19 06:47:52,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:47:52,060 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-08-19 06:47:52,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:52,064 INFO L225 Difference]: With dead ends: 54 [2020-08-19 06:47:52,064 INFO L226 Difference]: Without dead ends: 50 [2020-08-19 06:47:52,065 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 [2020-08-19 06:47:52,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-08-19 06:47:52,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-08-19 06:47:52,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-08-19 06:47:52,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2020-08-19 06:47:52,078 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 27 [2020-08-19 06:47:52,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:52,079 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2020-08-19 06:47:52,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:47:52,079 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2020-08-19 06:47:52,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-19 06:47:52,081 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:52,081 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] [2020-08-19 06:47:52,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:47:52,082 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:52,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:52,082 INFO L82 PathProgramCache]: Analyzing trace with hash 986908919, now seen corresponding path program 1 times [2020-08-19 06:47:52,083 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:52,083 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037906541] [2020-08-19 06:47:52,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:52,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-08-19 06:47:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:47:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,225 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-19 06:47:52,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037906541] [2020-08-19 06:47:52,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:52,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 06:47:52,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227633050] [2020-08-19 06:47:52,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:47:52,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:52,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:47:52,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:47:52,228 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand 6 states. [2020-08-19 06:47:52,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:52,303 INFO L93 Difference]: Finished difference Result 94 states and 142 transitions. [2020-08-19 06:47:52,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:47:52,304 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 39 [2020-08-19 06:47:52,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:52,305 INFO L225 Difference]: With dead ends: 94 [2020-08-19 06:47:52,306 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 06:47:52,307 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 [2020-08-19 06:47:52,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 06:47:52,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-08-19 06:47:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-19 06:47:52,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 71 transitions. [2020-08-19 06:47:52,319 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 71 transitions. Word has length 39 [2020-08-19 06:47:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:52,320 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 71 transitions. [2020-08-19 06:47:52,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:47:52,320 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 71 transitions. [2020-08-19 06:47:52,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-19 06:47:52,322 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:52,322 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] [2020-08-19 06:47:52,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:47:52,323 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:52,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:52,323 INFO L82 PathProgramCache]: Analyzing trace with hash -2100495745, now seen corresponding path program 1 times [2020-08-19 06:47:52,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:52,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [699060346] [2020-08-19 06:47:52,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:52,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:52,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-08-19 06:47:52,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [699060346] [2020-08-19 06:47:52,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:52,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:47:52,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713172881] [2020-08-19 06:47:52,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:47:52,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:52,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:47:52,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:47:52,505 INFO L87 Difference]: Start difference. First operand 52 states and 71 transitions. Second operand 8 states. [2020-08-19 06:47:52,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:52,624 INFO L93 Difference]: Finished difference Result 103 states and 158 transitions. [2020-08-19 06:47:52,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:47:52,625 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-08-19 06:47:52,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:52,628 INFO L225 Difference]: With dead ends: 103 [2020-08-19 06:47:52,632 INFO L226 Difference]: Without dead ends: 57 [2020-08-19 06:47:52,636 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 [2020-08-19 06:47:52,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-19 06:47:52,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-08-19 06:47:52,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-19 06:47:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 74 transitions. [2020-08-19 06:47:52,657 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 74 transitions. Word has length 40 [2020-08-19 06:47:52,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:52,658 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 74 transitions. [2020-08-19 06:47:52,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:47:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 74 transitions. [2020-08-19 06:47:52,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 06:47:52,664 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:52,664 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] [2020-08-19 06:47:52,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:47:52,664 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:52,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:52,666 INFO L82 PathProgramCache]: Analyzing trace with hash 208191613, now seen corresponding path program 1 times [2020-08-19 06:47:52,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:52,667 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178971151] [2020-08-19 06:47:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:52,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:52,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:52,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:52,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-08-19 06:47:52,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178971151] [2020-08-19 06:47:52,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:52,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:47:52,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306911956] [2020-08-19 06:47:52,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:47:52,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:52,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:47:52,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:47:52,837 INFO L87 Difference]: Start difference. First operand 54 states and 74 transitions. Second operand 8 states. [2020-08-19 06:47:53,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:53,018 INFO L93 Difference]: Finished difference Result 86 states and 126 transitions. [2020-08-19 06:47:53,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:47:53,019 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-08-19 06:47:53,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:53,021 INFO L225 Difference]: With dead ends: 86 [2020-08-19 06:47:53,021 INFO L226 Difference]: Without dead ends: 82 [2020-08-19 06:47:53,022 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 [2020-08-19 06:47:53,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-19 06:47:53,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-08-19 06:47:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 06:47:53,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 118 transitions. [2020-08-19 06:47:53,038 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 118 transitions. Word has length 41 [2020-08-19 06:47:53,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:53,039 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 118 transitions. [2020-08-19 06:47:53,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:47:53,040 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 118 transitions. [2020-08-19 06:47:53,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-19 06:47:53,042 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:53,042 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] [2020-08-19 06:47:53,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:47:53,043 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:53,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:53,043 INFO L82 PathProgramCache]: Analyzing trace with hash -405677468, now seen corresponding path program 1 times [2020-08-19 06:47:53,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:53,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711927552] [2020-08-19 06:47:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:53,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:53,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:53,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:53,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 06:47:53,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,197 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-08-19 06:47:53,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711927552] [2020-08-19 06:47:53,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:53,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:47:53,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993588933] [2020-08-19 06:47:53,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:47:53,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:53,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:47:53,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:47:53,199 INFO L87 Difference]: Start difference. First operand 79 states and 118 transitions. Second operand 8 states. [2020-08-19 06:47:53,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:53,343 INFO L93 Difference]: Finished difference Result 167 states and 288 transitions. [2020-08-19 06:47:53,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:47:53,343 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 54 [2020-08-19 06:47:53,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:53,345 INFO L225 Difference]: With dead ends: 167 [2020-08-19 06:47:53,346 INFO L226 Difference]: Without dead ends: 94 [2020-08-19 06:47:53,347 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 [2020-08-19 06:47:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-19 06:47:53,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2020-08-19 06:47:53,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-19 06:47:53,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 134 transitions. [2020-08-19 06:47:53,363 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 134 transitions. Word has length 54 [2020-08-19 06:47:53,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:53,364 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 134 transitions. [2020-08-19 06:47:53,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:47:53,364 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 134 transitions. [2020-08-19 06:47:53,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 06:47:53,366 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:53,366 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] [2020-08-19 06:47:53,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:47:53,367 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:53,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:53,367 INFO L82 PathProgramCache]: Analyzing trace with hash -242988780, now seen corresponding path program 1 times [2020-08-19 06:47:53,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:53,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1331724644] [2020-08-19 06:47:53,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:53,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:53,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:53,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:47:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,517 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-19 06:47:53,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1331724644] [2020-08-19 06:47:53,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:53,518 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:47:53,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392800641] [2020-08-19 06:47:53,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:47:53,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:53,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:47:53,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:47:53,520 INFO L87 Difference]: Start difference. First operand 88 states and 134 transitions. Second operand 10 states. [2020-08-19 06:47:53,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:53,710 INFO L93 Difference]: Finished difference Result 188 states and 331 transitions. [2020-08-19 06:47:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:47:53,710 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-08-19 06:47:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:53,712 INFO L225 Difference]: With dead ends: 188 [2020-08-19 06:47:53,713 INFO L226 Difference]: Without dead ends: 109 [2020-08-19 06:47:53,714 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 [2020-08-19 06:47:53,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-19 06:47:53,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2020-08-19 06:47:53,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-08-19 06:47:53,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 158 transitions. [2020-08-19 06:47:53,730 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 158 transitions. Word has length 55 [2020-08-19 06:47:53,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:53,730 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 158 transitions. [2020-08-19 06:47:53,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:47:53,731 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 158 transitions. [2020-08-19 06:47:53,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-19 06:47:53,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:53,733 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] [2020-08-19 06:47:53,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:47:53,733 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:53,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:53,733 INFO L82 PathProgramCache]: Analyzing trace with hash -908952008, now seen corresponding path program 2 times [2020-08-19 06:47:53,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:53,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557782419] [2020-08-19 06:47:53,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:53,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:53,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:53,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:53,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:47:53,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:53,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:53,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:53,963 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 30 proven. 52 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-08-19 06:47:53,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557782419] [2020-08-19 06:47:53,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:53,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 06:47:53,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911061684] [2020-08-19 06:47:53,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:47:53,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:53,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:47:53,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:47:53,966 INFO L87 Difference]: Start difference. First operand 100 states and 158 transitions. Second operand 12 states. [2020-08-19 06:47:54,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:54,338 INFO L93 Difference]: Finished difference Result 199 states and 354 transitions. [2020-08-19 06:47:54,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 06:47:54,339 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 82 [2020-08-19 06:47:54,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:54,341 INFO L225 Difference]: With dead ends: 199 [2020-08-19 06:47:54,341 INFO L226 Difference]: Without dead ends: 86 [2020-08-19 06:47:54,342 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 [2020-08-19 06:47:54,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-19 06:47:54,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 71. [2020-08-19 06:47:54,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-19 06:47:54,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 93 transitions. [2020-08-19 06:47:54,351 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 93 transitions. Word has length 82 [2020-08-19 06:47:54,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:54,351 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 93 transitions. [2020-08-19 06:47:54,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 06:47:54,352 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 93 transitions. [2020-08-19 06:47:54,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-19 06:47:54,353 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:54,353 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] [2020-08-19 06:47:54,354 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:47:54,354 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:54,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:54,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2119203654, now seen corresponding path program 2 times [2020-08-19 06:47:54,354 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:54,355 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393789976] [2020-08-19 06:47:54,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:54,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:54,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:54,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:54,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:54,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:54,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:47:54,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 06:47:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:54,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:54,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:54,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:54,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:47:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,589 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 44 proven. 79 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2020-08-19 06:47:54,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393789976] [2020-08-19 06:47:54,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:54,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:47:54,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61080524] [2020-08-19 06:47:54,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:47:54,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:54,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:47:54,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:47:54,592 INFO L87 Difference]: Start difference. First operand 71 states and 93 transitions. Second operand 10 states. [2020-08-19 06:47:54,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:54,777 INFO L93 Difference]: Finished difference Result 142 states and 204 transitions. [2020-08-19 06:47:54,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 06:47:54,778 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 110 [2020-08-19 06:47:54,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:54,779 INFO L225 Difference]: With dead ends: 142 [2020-08-19 06:47:54,779 INFO L226 Difference]: Without dead ends: 78 [2020-08-19 06:47:54,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:47:54,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-19 06:47:54,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-08-19 06:47:54,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-19 06:47:54,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 100 transitions. [2020-08-19 06:47:54,787 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 100 transitions. Word has length 110 [2020-08-19 06:47:54,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:54,788 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 100 transitions. [2020-08-19 06:47:54,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:47:54,788 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 100 transitions. [2020-08-19 06:47:54,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-08-19 06:47:54,790 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:54,790 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 13, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:54,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:47:54,790 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:54,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:54,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1263382818, now seen corresponding path program 3 times [2020-08-19 06:47:54,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:54,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321455147] [2020-08-19 06:47:54,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:54,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:54,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:54,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:54,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:54,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:47:54,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:55,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:55,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:55,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 06:47:55,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:55,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 06:47:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:55,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:55,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:47:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 06:47:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:55,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:55,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 999 backedges. 98 proven. 322 refuted. 0 times theorem prover too weak. 579 trivial. 0 not checked. [2020-08-19 06:47:55,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321455147] [2020-08-19 06:47:55,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:55,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 06:47:55,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519262602] [2020-08-19 06:47:55,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:47:55,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:55,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:47:55,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:47:55,243 INFO L87 Difference]: Start difference. First operand 78 states and 100 transitions. Second operand 12 states. [2020-08-19 06:47:55,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:55,566 INFO L93 Difference]: Finished difference Result 178 states and 263 transitions. [2020-08-19 06:47:55,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 06:47:55,567 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 192 [2020-08-19 06:47:55,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:55,569 INFO L225 Difference]: With dead ends: 178 [2020-08-19 06:47:55,569 INFO L226 Difference]: Without dead ends: 109 [2020-08-19 06:47:55,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-08-19 06:47:55,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-08-19 06:47:55,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 90. [2020-08-19 06:47:55,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-19 06:47:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 119 transitions. [2020-08-19 06:47:55,581 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 119 transitions. Word has length 192 [2020-08-19 06:47:55,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:55,581 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 119 transitions. [2020-08-19 06:47:55,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 06:47:55,582 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 119 transitions. [2020-08-19 06:47:55,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-19 06:47:55,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:55,584 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:55,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:47:55,584 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:55,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:55,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1677699577, now seen corresponding path program 1 times [2020-08-19 06:47:55,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:55,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68052195] [2020-08-19 06:47:55,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:55,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:55,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:55,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:55,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:55,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:55,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:47:55,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:55,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:55,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 06:47:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:55,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:55,819 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 77 proven. 26 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2020-08-19 06:47:55,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68052195] [2020-08-19 06:47:55,820 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:55,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:47:55,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043878770] [2020-08-19 06:47:55,821 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:47:55,821 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:55,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:47:55,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:47:55,822 INFO L87 Difference]: Start difference. First operand 90 states and 119 transitions. Second operand 11 states. [2020-08-19 06:47:56,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:56,067 INFO L93 Difference]: Finished difference Result 172 states and 244 transitions. [2020-08-19 06:47:56,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 06:47:56,069 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 96 [2020-08-19 06:47:56,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:56,070 INFO L225 Difference]: With dead ends: 172 [2020-08-19 06:47:56,071 INFO L226 Difference]: Without dead ends: 94 [2020-08-19 06:47:56,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-08-19 06:47:56,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-19 06:47:56,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2020-08-19 06:47:56,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-08-19 06:47:56,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 126 transitions. [2020-08-19 06:47:56,085 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 126 transitions. Word has length 96 [2020-08-19 06:47:56,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:56,086 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 126 transitions. [2020-08-19 06:47:56,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:47:56,087 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 126 transitions. [2020-08-19 06:47:56,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-19 06:47:56,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:56,090 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:56,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:47:56,090 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:56,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:56,090 INFO L82 PathProgramCache]: Analyzing trace with hash 265701462, now seen corresponding path program 2 times [2020-08-19 06:47:56,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:56,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141630727] [2020-08-19 06:47:56,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:56,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:56,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:47:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:56,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 06:47:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-08-19 06:47:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-08-19 06:47:56,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 06:47:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 56 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-08-19 06:47:56,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141630727] [2020-08-19 06:47:56,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:56,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 06:47:56,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993268197] [2020-08-19 06:47:56,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:47:56,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:56,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:47:56,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:47:56,359 INFO L87 Difference]: Start difference. First operand 94 states and 126 transitions. Second operand 12 states. [2020-08-19 06:47:56,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:56,683 INFO L93 Difference]: Finished difference Result 185 states and 262 transitions. [2020-08-19 06:47:56,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 06:47:56,683 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 110 [2020-08-19 06:47:56,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:56,685 INFO L225 Difference]: With dead ends: 185 [2020-08-19 06:47:56,685 INFO L226 Difference]: Without dead ends: 104 [2020-08-19 06:47:56,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2020-08-19 06:47:56,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-19 06:47:56,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 91. [2020-08-19 06:47:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-19 06:47:56,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 120 transitions. [2020-08-19 06:47:56,696 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 120 transitions. Word has length 110 [2020-08-19 06:47:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:56,696 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 120 transitions. [2020-08-19 06:47:56,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 06:47:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 120 transitions. [2020-08-19 06:47:56,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-19 06:47:56,699 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:56,699 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:56,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:47:56,700 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:56,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:56,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1540036056, now seen corresponding path program 3 times [2020-08-19 06:47:56,700 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:56,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728377412] [2020-08-19 06:47:56,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 06:47:56,721 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 06:47:56,721 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 06:47:56,728 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 06:47:56,765 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 06:47:56 BoogieIcfgContainer [2020-08-19 06:47:56,766 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 06:47:56,769 INFO L168 Benchmark]: Toolchain (without parser) took 6624.08 ms. Allocated memory was 137.4 MB in the beginning and 327.7 MB in the end (delta: 190.3 MB). Free memory was 100.3 MB in the beginning and 121.4 MB in the end (delta: -21.2 MB). Peak memory consumption was 169.1 MB. Max. memory is 7.1 GB. [2020-08-19 06:47:56,769 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 06:47:56,770 INFO L168 Benchmark]: CACSL2BoogieTranslator took 259.33 ms. Allocated memory is still 137.4 MB. Free memory was 100.1 MB in the beginning and 90.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-19 06:47:56,775 INFO L168 Benchmark]: Boogie Preprocessor took 105.14 ms. Allocated memory was 137.4 MB in the beginning and 199.2 MB in the end (delta: 61.9 MB). Free memory was 90.7 MB in the beginning and 178.2 MB in the end (delta: -87.5 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. [2020-08-19 06:47:56,779 INFO L168 Benchmark]: RCFGBuilder took 261.12 ms. Allocated memory is still 199.2 MB. Free memory was 178.2 MB in the beginning and 164.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. [2020-08-19 06:47:56,782 INFO L168 Benchmark]: TraceAbstraction took 5993.35 ms. Allocated memory was 199.2 MB in the beginning and 327.7 MB in the end (delta: 128.5 MB). Free memory was 163.7 MB in the beginning and 121.4 MB in the end (delta: 42.2 MB). Peak memory consumption was 170.7 MB. Max. memory is 7.1 GB. [2020-08-19 06:47:56,788 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 137.4 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 259.33 ms. Allocated memory is still 137.4 MB. Free memory was 100.1 MB in the beginning and 90.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.14 ms. Allocated memory was 137.4 MB in the beginning and 199.2 MB in the end (delta: 61.9 MB). Free memory was 90.7 MB in the beginning and 178.2 MB in the end (delta: -87.5 MB). Peak memory consumption was 13.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 261.12 ms. Allocated memory is still 199.2 MB. Free memory was 178.2 MB in the beginning and 164.3 MB in the end (delta: 13.8 MB). Peak memory consumption was 13.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5993.35 ms. Allocated memory was 199.2 MB in the beginning and 327.7 MB in the end (delta: 128.5 MB). Free memory was 163.7 MB in the beginning and 121.4 MB in the end (delta: 42.2 MB). Peak memory consumption was 170.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 39]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L36] int x = 5; [L37] CALL, EXPR fibo1(x) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND TRUE n < 1 [L9] return 0; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND FALSE !(n < 1) [L20] COND FALSE !(n == 1) [L23] CALL, EXPR fibo1(n-1) [L8] COND FALSE !(n < 1) [L10] COND FALSE !(n == 1) [L13] CALL, EXPR fibo2(n-1) [L18] COND FALSE !(n < 1) [L20] COND TRUE n == 1 [L21] return 1; [L13] RET, EXPR fibo2(n-1) [L13] CALL, EXPR fibo2(n-2) [L18] COND TRUE n < 1 [L19] return 0; [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L23] RET, EXPR fibo1(n-1) [L23] CALL, EXPR fibo1(n-2) [L8] COND FALSE !(n < 1) [L10] COND TRUE n == 1 [L11] return 1; [L23] RET, EXPR fibo1(n-2) [L23] return fibo1(n-1) + fibo1(n-2); [L13] RET, EXPR fibo2(n-2) [L13] return fibo2(n-1) + fibo2(n-2); [L37] RET, EXPR fibo1(x) [L37] int result = fibo1(x); [L38] COND TRUE result == 5 [L39] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.8s, OverallIterations: 15, TraceHistogramMax: 17, AutomataDifference: 2.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 407 SDtfs, 411 SDslu, 1760 SDs, 0 SdLazy, 1927 SolverSat, 259 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 451 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 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: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 74 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 1008 NumberOfCodeBlocks, 1008 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 885 ConstructedInterpolants, 0 QuantifiedInterpolants, 140149 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 1400/2017 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...