/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=1000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 16:31:28,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 16:31:28,670 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 16:31:28,713 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 16:31:28,713 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 16:31:28,726 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 16:31:28,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 16:31:28,731 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 16:31:28,735 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 16:31:28,737 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 16:31:28,738 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 16:31:28,742 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 16:31:28,743 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 16:31:28,747 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 16:31:28,748 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 16:31:28,750 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 16:31:28,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 16:31:28,755 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 16:31:28,757 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 16:31:28,765 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 16:31:28,766 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 16:31:28,769 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 16:31:28,770 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 16:31:28,771 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 16:31:28,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 16:31:28,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 16:31:28,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 16:31:28,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 16:31:28,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 16:31:28,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 16:31:28,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 16:31:28,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 16:31:28,777 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 16:31:28,778 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 16:31:28,779 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 16:31:28,779 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 16:31:28,780 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 16:31:28,780 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 16:31:28,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 16:31:28,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 16:31:28,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 16:31:28,783 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 16:31:28,805 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 16:31:28,806 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 16:31:28,807 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 16:31:28,807 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 16:31:28,807 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 16:31:28,808 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 16:31:28,808 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 16:31:28,808 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 16:31:28,808 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 16:31:28,808 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 16:31:28,809 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 16:31:28,809 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 16:31:28,809 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 16:31:28,809 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 16:31:28,809 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 16:31:28,810 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 16:31:28,810 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 16:31:28,810 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 16:31:28,810 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 16:31:28,810 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 16:31:28,811 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 16:31:28,811 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:31:28,811 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 16:31:28,811 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 16:31:28,811 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 16:31:28,812 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 16:31:28,812 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 16:31:28,812 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 16:31:28,812 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 16:31:28,812 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=1000;interpolation-heuristic=SMALLEST;log-additional-information=true; [2020-08-21 16:31:29,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 16:31:29,127 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 16:31:29,136 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 16:31:29,138 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 16:31:29,139 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 16:31:29,139 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-08-21 16:31:29,211 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cc53b9a2/e79b5aa9300c4e33b364fa9ac68c395c/FLAG8584d9ba0 [2020-08-21 16:31:29,711 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 16:31:29,712 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b3_o5.c [2020-08-21 16:31:29,719 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cc53b9a2/e79b5aa9300c4e33b364fa9ac68c395c/FLAG8584d9ba0 [2020-08-21 16:31:30,066 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3cc53b9a2/e79b5aa9300c4e33b364fa9ac68c395c [2020-08-21 16:31:30,076 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 16:31:30,078 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 16:31:30,079 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 16:31:30,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 16:31:30,083 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 16:31:30,084 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:31:30" (1/1) ... [2020-08-21 16:31:30,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bd8ad23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:30, skipping insertion in model container [2020-08-21 16:31:30,088 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 04:31:30" (1/1) ... [2020-08-21 16:31:30,096 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 16:31:30,115 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 16:31:30,282 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:31:30,287 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 16:31:30,306 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 16:31:30,323 INFO L208 MainTranslator]: Completed translation [2020-08-21 16:31:30,323 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:30 WrapperNode [2020-08-21 16:31:30,324 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 16:31:30,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 16:31:30,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 16:31:30,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 16:31:30,340 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:30" (1/1) ... [2020-08-21 16:31:30,340 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:30" (1/1) ... [2020-08-21 16:31:30,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:30" (1/1) ... [2020-08-21 16:31:30,347 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:30" (1/1) ... [2020-08-21 16:31:30,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:30" (1/1) ... [2020-08-21 16:31:30,449 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:30" (1/1) ... [2020-08-21 16:31:30,450 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:30" (1/1) ... [2020-08-21 16:31:30,452 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 16:31:30,452 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 16:31:30,452 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 16:31:30,453 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 16:31:30,454 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 16:31:30,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 16:31:30,516 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 16:31:30,517 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 16:31:30,517 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-21 16:31:30,517 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 16:31:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 16:31:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 16:31:30,517 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 16:31:30,518 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-21 16:31:30,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 16:31:30,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 16:31:30,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 16:31:30,720 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 16:31:30,720 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 16:31:30,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:31:30 BoogieIcfgContainer [2020-08-21 16:31:30,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 16:31:30,728 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 16:31:30,728 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 16:31:30,732 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 16:31:30,732 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 04:31:30" (1/3) ... [2020-08-21 16:31:30,733 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@195d9964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:31:30, skipping insertion in model container [2020-08-21 16:31:30,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 04:31:30" (2/3) ... [2020-08-21 16:31:30,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@195d9964 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 04:31:30, skipping insertion in model container [2020-08-21 16:31:30,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 04:31:30" (3/3) ... [2020-08-21 16:31:30,736 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b3_o5.c [2020-08-21 16:31:30,748 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 16:31:30,757 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 16:31:30,777 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 16:31:30,848 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 16:31:30,848 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 16:31:30,849 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 16:31:30,849 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 16:31:30,849 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 16:31:30,849 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 16:31:30,849 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 16:31:30,850 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 16:31:30,876 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-21 16:31:30,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 16:31:30,883 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:30,884 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:31:30,886 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:30,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:30,893 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-21 16:31:30,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:30,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314080600] [2020-08-21 16:31:30,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:31,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:31,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:31,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:31,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:31,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:31:31,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314080600] [2020-08-21 16:31:31,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:31:31,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:31:31,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596153098] [2020-08-21 16:31:31,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:31:31,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:31,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:31:31,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:31:31,219 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-21 16:31:31,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:31,274 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-21 16:31:31,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:31:31,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 16:31:31,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:31,289 INFO L225 Difference]: With dead ends: 40 [2020-08-21 16:31:31,290 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 16:31:31,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:31:31,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 16:31:31,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-21 16:31:31,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 16:31:31,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-21 16:31:31,344 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-21 16:31:31,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:31,344 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-21 16:31:31,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:31:31,345 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-21 16:31:31,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 16:31:31,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:31,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:31:31,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 16:31:31,348 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:31,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:31,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-21 16:31:31,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:31,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345867942] [2020-08-21 16:31:31,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:31,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:31,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:31,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:31,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:31,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:31,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:31,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:31,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:31:31,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345867942] [2020-08-21 16:31:31,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:31:31,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:31:31,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655211881] [2020-08-21 16:31:31,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:31:31,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:31,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:31:31,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:31:31,506 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-21 16:31:31,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:31,526 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-21 16:31:31,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:31:31,527 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-21 16:31:31,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:31,529 INFO L225 Difference]: With dead ends: 32 [2020-08-21 16:31:31,529 INFO L226 Difference]: Without dead ends: 28 [2020-08-21 16:31:31,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:31:31,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-21 16:31:31,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-21 16:31:31,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 16:31:31,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-21 16:31:31,543 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-21 16:31:31,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:31,544 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-21 16:31:31,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:31:31,545 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-21 16:31:31,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 16:31:31,546 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:31,546 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:31:31,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 16:31:31,548 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:31,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:31,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-21 16:31:31,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:31,552 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1719867090] [2020-08-21 16:31:31,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:31,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:31,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:31,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:31,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:31,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 16:31:31,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1719867090] [2020-08-21 16:31:31,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:31:31,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 16:31:31,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237015207] [2020-08-21 16:31:31,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 16:31:31,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:31,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 16:31:31,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-21 16:31:31,799 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-21 16:31:31,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:31,862 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-21 16:31:31,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 16:31:31,863 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-21 16:31:31,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:31,864 INFO L225 Difference]: With dead ends: 48 [2020-08-21 16:31:31,864 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 16:31:31,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 16:31:31,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 16:31:31,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 16:31:31,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 16:31:31,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-21 16:31:31,874 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-21 16:31:31,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:31,874 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-21 16:31:31,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 16:31:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-21 16:31:31,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 16:31:31,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:31,876 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:31:31,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 16:31:31,877 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:31,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:31,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-21 16:31:31,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:31,878 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [780611795] [2020-08-21 16:31:31,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:31,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:31,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:31,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:32,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:32,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 16:31:32,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [780611795] [2020-08-21 16:31:32,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 16:31:32,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 16:31:32,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719911633] [2020-08-21 16:31:32,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 16:31:32,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:32,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 16:31:32,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:31:32,065 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-21 16:31:32,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:32,112 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-21 16:31:32,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 16:31:32,113 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-21 16:31:32,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:32,114 INFO L225 Difference]: With dead ends: 50 [2020-08-21 16:31:32,115 INFO L226 Difference]: Without dead ends: 36 [2020-08-21 16:31:32,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 16:31:32,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-21 16:31:32,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-21 16:31:32,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 16:31:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-21 16:31:32,123 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-21 16:31:32,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:32,123 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-21 16:31:32,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 16:31:32,124 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-21 16:31:32,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 16:31:32,125 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:32,125 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:31:32,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 16:31:32,126 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:32,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:32,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-21 16:31:32,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:32,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634477693] [2020-08-21 16:31:32,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:32,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:32,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:32,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:32,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:32,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:32,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 16:31:32,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634477693] [2020-08-21 16:31:32,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:32,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 16:31:32,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137866551] [2020-08-21 16:31:32,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 16:31:32,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:32,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 16:31:32,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-21 16:31:32,332 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-08-21 16:31:32,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:32,442 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-08-21 16:31:32,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 16:31:32,443 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-21 16:31:32,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:32,445 INFO L225 Difference]: With dead ends: 64 [2020-08-21 16:31:32,446 INFO L226 Difference]: Without dead ends: 44 [2020-08-21 16:31:32,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2020-08-21 16:31:32,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-21 16:31:32,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-08-21 16:31:32,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-21 16:31:32,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-21 16:31:32,458 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-08-21 16:31:32,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:32,459 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-21 16:31:32,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 16:31:32,459 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-21 16:31:32,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 16:31:32,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:32,460 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-21 16:31:32,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 16:31:32,461 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:32,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:32,464 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-08-21 16:31:32,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:32,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186101170] [2020-08-21 16:31:32,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:32,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:32,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:32,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:32,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:32,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:32,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:32,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:32,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:32,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 16:31:32,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186101170] [2020-08-21 16:31:32,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:32,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 16:31:32,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345501179] [2020-08-21 16:31:32,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 16:31:32,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:32,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 16:31:32,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-21 16:31:32,753 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2020-08-21 16:31:32,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:32,926 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2020-08-21 16:31:32,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:31:32,927 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-21 16:31:32,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:32,929 INFO L225 Difference]: With dead ends: 74 [2020-08-21 16:31:32,929 INFO L226 Difference]: Without dead ends: 54 [2020-08-21 16:31:32,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-21 16:31:32,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-21 16:31:32,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-08-21 16:31:32,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-21 16:31:32,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-21 16:31:32,938 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2020-08-21 16:31:32,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:32,939 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-21 16:31:32,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 16:31:32,939 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-21 16:31:32,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 16:31:32,940 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:32,941 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:31:32,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 16:31:32,941 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:32,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:32,942 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-08-21 16:31:32,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:32,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639781898] [2020-08-21 16:31:32,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:32,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:32,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:33,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:33,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:33,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:33,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:33,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:33,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:33,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-21 16:31:33,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639781898] [2020-08-21 16:31:33,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:33,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 16:31:33,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926477822] [2020-08-21 16:31:33,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 16:31:33,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:33,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 16:31:33,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-21 16:31:33,272 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 14 states. [2020-08-21 16:31:33,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:33,441 INFO L93 Difference]: Finished difference Result 78 states and 86 transitions. [2020-08-21 16:31:33,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:31:33,442 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-08-21 16:31:33,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:33,443 INFO L225 Difference]: With dead ends: 78 [2020-08-21 16:31:33,444 INFO L226 Difference]: Without dead ends: 60 [2020-08-21 16:31:33,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-21 16:31:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-21 16:31:33,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2020-08-21 16:31:33,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-21 16:31:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-08-21 16:31:33,452 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 41 [2020-08-21 16:31:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:33,453 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-08-21 16:31:33,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 16:31:33,453 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-08-21 16:31:33,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-21 16:31:33,456 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 16:31:33,456 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 16:31:33,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 16:31:33,456 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 16:31:33,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 16:31:33,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2020-08-21 16:31:33,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 16:31:33,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014308934] [2020-08-21 16:31:33,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 16:31:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:33,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 16:31:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:33,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 16:31:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:33,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:33,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:33,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:33,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:33,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:33,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:33,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 16:31:33,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 16:31:33,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 16:31:33,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1014308934] [2020-08-21 16:31:33,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 16:31:33,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 16:31:33,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045842399] [2020-08-21 16:31:33,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 16:31:33,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 16:31:33,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 16:31:33,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-21 16:31:33,926 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 14 states. [2020-08-21 16:31:34,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 16:31:34,068 INFO L93 Difference]: Finished difference Result 66 states and 71 transitions. [2020-08-21 16:31:34,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 16:31:34,068 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-08-21 16:31:34,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 16:31:34,069 INFO L225 Difference]: With dead ends: 66 [2020-08-21 16:31:34,069 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 16:31:34,070 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-08-21 16:31:34,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 16:31:34,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 16:31:34,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 16:31:34,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 16:31:34,073 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-08-21 16:31:34,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 16:31:34,074 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 16:31:34,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 16:31:34,074 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 16:31:34,074 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 16:31:34,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 16:31:34,077 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 16:31:34,121 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 16:31:34,122 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:31:34,122 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-21 16:31:34,122 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-21 16:31:34,122 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-21 16:31:34,122 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-08-21 16:31:34,122 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-08-21 16:31:34,123 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-21 16:31:34,123 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-08-21 16:31:34,123 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 16:31:34,123 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 16:31:34,123 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 16:31:34,123 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 16:31:34,124 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-08-21 16:31:34,124 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-21 16:31:34,124 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-21 16:31:34,124 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-08-21 16:31:34,124 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-21 16:31:34,124 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-21 16:31:34,124 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-21 16:31:34,124 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-08-21 16:31:34,125 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-08-21 16:31:34,125 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-21 16:31:34,125 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-08-21 16:31:34,125 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-21 16:31:34,125 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 16:31:34,125 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-21 16:31:34,126 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-21 16:31:34,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 04:31:34 BoogieIcfgContainer [2020-08-21 16:31:34,132 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 16:31:34,135 INFO L168 Benchmark]: Toolchain (without parser) took 4056.30 ms. Allocated memory was 140.0 MB in the beginning and 245.4 MB in the end (delta: 105.4 MB). Free memory was 102.0 MB in the beginning and 217.0 MB in the end (delta: -114.9 MB). Peak memory consumption was 107.6 MB. Max. memory is 7.1 GB. [2020-08-21 16:31:34,136 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 16:31:34,137 INFO L168 Benchmark]: CACSL2BoogieTranslator took 245.04 ms. Allocated memory is still 140.0 MB. Free memory was 101.8 MB in the beginning and 92.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-21 16:31:34,138 INFO L168 Benchmark]: Boogie Preprocessor took 127.32 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 92.2 MB in the beginning and 183.6 MB in the end (delta: -91.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 16:31:34,139 INFO L168 Benchmark]: RCFGBuilder took 273.93 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 170.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 16:31:34,140 INFO L168 Benchmark]: TraceAbstraction took 3404.79 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 170.1 MB in the beginning and 217.0 MB in the end (delta: -46.9 MB). Peak memory consumption was 111.1 MB. Max. memory is 7.1 GB. [2020-08-21 16:31:34,143 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 245.04 ms. Allocated memory is still 140.0 MB. Free memory was 101.8 MB in the beginning and 92.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.32 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 92.2 MB in the beginning and 183.6 MB in the end (delta: -91.4 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 273.93 ms. Allocated memory is still 204.5 MB. Free memory was 183.6 MB in the beginning and 170.7 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3404.79 ms. Allocated memory was 204.5 MB in the beginning and 245.4 MB in the end (delta: 40.9 MB). Free memory was 170.1 MB in the beginning and 217.0 MB in the end (delta: -46.9 MB). Peak memory consumption was 111.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 25]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.2s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 245 SDtfs, 32 SDslu, 1737 SDs, 0 SdLazy, 450 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 160 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 30 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 11 PreInvPairs, 11 NumberOfFragments, 9 HoareAnnotationTreeSize, 11 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.8s InterpolantComputationTime, 230 NumberOfCodeBlocks, 230 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 222 ConstructedInterpolants, 0 QuantifiedInterpolants, 23450 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 4 PerfectInterpolantSequences, 53/77 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...