/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=WIDEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 22:49:58,067 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 22:49:58,070 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 22:49:58,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 22:49:58,094 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 22:49:58,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 22:49:58,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 22:49:58,099 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 22:49:58,100 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 22:49:58,101 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 22:49:58,102 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 22:49:58,103 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 22:49:58,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 22:49:58,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 22:49:58,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 22:49:58,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 22:49:58,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 22:49:58,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 22:49:58,111 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 22:49:58,113 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 22:49:58,115 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 22:49:58,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 22:49:58,118 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 22:49:58,119 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 22:49:58,121 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 22:49:58,122 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 22:49:58,122 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 22:49:58,123 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 22:49:58,123 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 22:49:58,124 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 22:49:58,124 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 22:49:58,125 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 22:49:58,126 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 22:49:58,127 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 22:49:58,128 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 22:49:58,128 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 22:49:58,129 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 22:49:58,129 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 22:49:58,129 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 22:49:58,131 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 22:49:58,131 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 22:49:58,132 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 [2020-08-18 22:49:58,156 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 22:49:58,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 22:49:58,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 22:49:58,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 22:49:58,158 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 22:49:58,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 22:49:58,159 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 22:49:58,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 22:49:58,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 22:49:58,160 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 22:49:58,160 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 22:49:58,160 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 22:49:58,160 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 22:49:58,160 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 22:49:58,161 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 22:49:58,161 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 22:49:58,161 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 22:49:58,161 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 22:49:58,161 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 22:49:58,162 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 22:49:58,162 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 22:49:58,162 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 22:49:58,162 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 22:49:58,163 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 22:49:58,163 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 22:49:58,163 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 22:49:58,163 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 22:49:58,163 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 22:49:58,164 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 22:49:58,164 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=WIDEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDEST; [2020-08-18 22:49:58,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 22:49:58,535 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 22:49:58,539 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 22:49:58,541 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 22:49:58,541 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 22:49:58,543 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-08-18 22:49:58,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/241698c86/b539b2083c614cd4acc2e01bfab1f0d1/FLAGe991adbef [2020-08-18 22:49:59,118 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 22:49:59,119 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs3f.c [2020-08-18 22:49:59,126 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/241698c86/b539b2083c614cd4acc2e01bfab1f0d1/FLAGe991adbef [2020-08-18 22:49:59,472 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/241698c86/b539b2083c614cd4acc2e01bfab1f0d1 [2020-08-18 22:49:59,481 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 22:49:59,483 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 22:49:59,484 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 22:49:59,485 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 22:49:59,488 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 22:49:59,489 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:49:59" (1/1) ... [2020-08-18 22:49:59,492 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55e164ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:59, skipping insertion in model container [2020-08-18 22:49:59,492 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:49:59" (1/1) ... [2020-08-18 22:49:59,500 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 22:49:59,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 22:49:59,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:49:59,799 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 22:49:59,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 22:49:59,995 INFO L208 MainTranslator]: Completed translation [2020-08-18 22:49:59,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:59 WrapperNode [2020-08-18 22:49:59,996 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 22:49:59,997 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 22:49:59,997 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 22:49:59,997 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 22:50:00,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:59" (1/1) ... [2020-08-18 22:50:00,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:59" (1/1) ... [2020-08-18 22:50:00,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:59" (1/1) ... [2020-08-18 22:50:00,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:59" (1/1) ... [2020-08-18 22:50:00,052 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:59" (1/1) ... [2020-08-18 22:50:00,058 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:59" (1/1) ... [2020-08-18 22:50:00,066 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:59" (1/1) ... [2020-08-18 22:50:00,070 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 22:50:00,070 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 22:50:00,071 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 22:50:00,071 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 22:50:00,072 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:59" (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 [2020-08-18 22:50:00,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 22:50:00,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 22:50:00,141 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 22:50:00,142 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 22:50:00,142 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 22:50:00,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 22:50:00,142 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 22:50:00,142 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 22:50:00,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 22:50:00,143 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 22:50:00,143 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 22:50:00,143 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 22:50:00,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 22:50:00,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 22:50:00,144 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 22:50:00,144 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 22:50:00,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 22:50:00,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 22:50:00,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 22:50:00,474 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 22:50:00,474 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 22:50:00,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:50:00 BoogieIcfgContainer [2020-08-18 22:50:00,478 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 22:50:00,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 22:50:00,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 22:50:00,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 22:50:00,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:49:59" (1/3) ... [2020-08-18 22:50:00,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d60ee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:50:00, skipping insertion in model container [2020-08-18 22:50:00,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:49:59" (2/3) ... [2020-08-18 22:50:00,486 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d60ee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:50:00, skipping insertion in model container [2020-08-18 22:50:00,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:50:00" (3/3) ... [2020-08-18 22:50:00,488 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-08-18 22:50:00,500 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 22:50:00,507 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 22:50:00,522 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 22:50:00,543 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 22:50:00,543 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 22:50:00,543 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 22:50:00,543 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 22:50:00,544 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 22:50:00,544 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 22:50:00,544 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 22:50:00,544 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 22:50:00,561 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-18 22:50:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:50:00,567 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:00,568 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:00,568 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:00,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:00,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-18 22:50:00,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:00,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [291999797] [2020-08-18 22:50:00,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:00,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:00,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:00,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 22:50:00,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:00,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:50:00,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [291999797] [2020-08-18 22:50:00,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:50:00,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 22:50:00,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525203274] [2020-08-18 22:50:00,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 22:50:00,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:00,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 22:50:00,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:50:00,814 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-18 22:50:00,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:00,929 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-18 22:50:00,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 22:50:00,931 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 22:50:00,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:00,940 INFO L225 Difference]: With dead ends: 56 [2020-08-18 22:50:00,940 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 22:50:00,944 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 22:50:00,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 22:50:00,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-18 22:50:00,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 22:50:00,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-18 22:50:00,983 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-08-18 22:50:00,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:00,983 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-18 22:50:00,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 22:50:00,984 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-18 22:50:00,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 22:50:00,985 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:00,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:00,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 22:50:00,986 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:00,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:00,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-18 22:50:00,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:00,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1701578682] [2020-08-18 22:50:00,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:01,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:01,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:01,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:01,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 22:50:01,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:50:01,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1701578682] [2020-08-18 22:50:01,118 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:50:01,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 22:50:01,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131066155] [2020-08-18 22:50:01,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:50:01,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:01,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:50:01,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:50:01,122 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-08-18 22:50:01,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:01,298 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-18 22:50:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 22:50:01,299 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-18 22:50:01,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:01,300 INFO L225 Difference]: With dead ends: 45 [2020-08-18 22:50:01,301 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 22:50:01,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 22:50:01,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 22:50:01,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 22:50:01,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 22:50:01,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-18 22:50:01,322 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-08-18 22:50:01,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:01,325 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-18 22:50:01,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:50:01,325 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-18 22:50:01,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 22:50:01,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:01,328 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 22:50:01,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 22:50:01,329 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:01,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:01,332 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-18 22:50:01,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:01,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2085316037] [2020-08-18 22:50:01,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:01,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:01,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:01,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 22:50:01,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 22:50:01,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2085316037] [2020-08-18 22:50:01,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 22:50:01,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 22:50:01,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551282738] [2020-08-18 22:50:01,623 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:50:01,623 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:01,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:50:01,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:50:01,625 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-08-18 22:50:01,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:01,871 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-18 22:50:01,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 22:50:01,872 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-18 22:50:01,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:01,873 INFO L225 Difference]: With dead ends: 39 [2020-08-18 22:50:01,873 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 22:50:01,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-08-18 22:50:01,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 22:50:01,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-18 22:50:01,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 22:50:01,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-18 22:50:01,886 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-08-18 22:50:01,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:01,888 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-18 22:50:01,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:50:01,888 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-18 22:50:01,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 22:50:01,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:01,890 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, 1, 1, 1] [2020-08-18 22:50:01,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 22:50:01,891 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:01,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:01,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-08-18 22:50:01,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:01,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601798298] [2020-08-18 22:50:01,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:01,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:02,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:02,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 22:50:02,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:02,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 22:50:02,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601798298] [2020-08-18 22:50:02,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:02,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 22:50:02,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222083596] [2020-08-18 22:50:02,055 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 22:50:02,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:02,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 22:50:02,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 22:50:02,061 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-08-18 22:50:02,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:02,235 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-18 22:50:02,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 22:50:02,235 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-08-18 22:50:02,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:02,236 INFO L225 Difference]: With dead ends: 54 [2020-08-18 22:50:02,237 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 22:50:02,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-18 22:50:02,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 22:50:02,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-18 22:50:02,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 22:50:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-18 22:50:02,245 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-08-18 22:50:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:02,246 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-18 22:50:02,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 22:50:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-18 22:50:02,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 22:50:02,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:02,247 INFO L422 BasicCegarLoop]: trace histogram [2, 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] [2020-08-18 22:50:02,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 22:50:02,248 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:02,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 2 times [2020-08-18 22:50:02,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:02,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746138876] [2020-08-18 22:50:02,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:02,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:02,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 22:50:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:02,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 22:50:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 22:50:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 22:50:02,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746138876] [2020-08-18 22:50:02,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 22:50:02,342 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 22:50:02,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886606519] [2020-08-18 22:50:02,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 22:50:02,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 22:50:02,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 22:50:02,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:50:02,344 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-08-18 22:50:02,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 22:50:02,448 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-08-18 22:50:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 22:50:02,448 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-18 22:50:02,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 22:50:02,449 INFO L225 Difference]: With dead ends: 55 [2020-08-18 22:50:02,449 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 22:50:02,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 22:50:02,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 22:50:02,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-08-18 22:50:02,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 22:50:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-18 22:50:02,457 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-08-18 22:50:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 22:50:02,458 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-18 22:50:02,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 22:50:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-18 22:50:02,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 22:50:02,459 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 22:50:02,459 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-18 22:50:02,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 22:50:02,460 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 22:50:02,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 22:50:02,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-08-18 22:50:02,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 22:50:02,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504278632] [2020-08-18 22:50:02,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 22:50:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 22:50:02,495 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 22:50:02,495 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 22:50:02,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 22:50:02,520 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:50:02 BoogieIcfgContainer [2020-08-18 22:50:02,521 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 22:50:02,524 INFO L168 Benchmark]: Toolchain (without parser) took 3039.60 ms. Allocated memory was 134.7 MB in the beginning and 224.9 MB in the end (delta: 90.2 MB). Free memory was 97.5 MB in the beginning and 121.9 MB in the end (delta: -24.5 MB). Peak memory consumption was 65.7 MB. Max. memory is 7.1 GB. [2020-08-18 22:50:02,525 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 134.7 MB. Free memory was 116.2 MB in the beginning and 116.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 22:50:02,526 INFO L168 Benchmark]: CACSL2BoogieTranslator took 512.31 ms. Allocated memory was 134.7 MB in the beginning and 200.8 MB in the end (delta: 66.1 MB). Free memory was 97.2 MB in the beginning and 179.6 MB in the end (delta: -82.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-08-18 22:50:02,527 INFO L168 Benchmark]: Boogie Preprocessor took 72.90 ms. Allocated memory is still 200.8 MB. Free memory was 179.6 MB in the beginning and 177.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-08-18 22:50:02,528 INFO L168 Benchmark]: RCFGBuilder took 408.17 ms. Allocated memory is still 200.8 MB. Free memory was 177.6 MB in the beginning and 159.9 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. [2020-08-18 22:50:02,529 INFO L168 Benchmark]: TraceAbstraction took 2040.90 ms. Allocated memory was 200.8 MB in the beginning and 224.9 MB in the end (delta: 24.1 MB). Free memory was 159.9 MB in the beginning and 121.9 MB in the end (delta: 38.0 MB). Peak memory consumption was 62.1 MB. Max. memory is 7.1 GB. [2020-08-18 22:50:02,533 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 134.7 MB. Free memory was 116.2 MB in the beginning and 116.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 512.31 ms. Allocated memory was 134.7 MB in the beginning and 200.8 MB in the end (delta: 66.1 MB). Free memory was 97.2 MB in the beginning and 179.6 MB in the end (delta: -82.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 72.90 ms. Allocated memory is still 200.8 MB. Free memory was 179.6 MB in the beginning and 177.6 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 408.17 ms. Allocated memory is still 200.8 MB. Free memory was 177.6 MB in the beginning and 159.9 MB in the end (delta: 17.7 MB). Peak memory consumption was 17.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2040.90 ms. Allocated memory was 200.8 MB in the beginning and 224.9 MB in the end (delta: 24.1 MB). Free memory was 159.9 MB in the beginning and 121.9 MB in the end (delta: 38.0 MB). Peak memory consumption was 62.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i