/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:08:18,375 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 01:08:18,378 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 01:08:18,403 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 01:08:18,404 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:08:18,405 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:08:18,406 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:08:18,408 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:08:18,410 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:08:18,411 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:08:18,412 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:08:18,413 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:08:18,414 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:08:18,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:08:18,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:08:18,418 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:08:18,419 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:08:18,420 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:08:18,422 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:08:18,424 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:08:18,426 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:08:18,427 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:08:18,428 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:08:18,429 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:08:18,432 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 01:08:18,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 01:08:18,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 01:08:18,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 01:08:18,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 01:08:18,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-19 01:08:18,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-19 01:08:18,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-19 01:08:18,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-19 01:08:18,437 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-19 01:08:18,438 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-19 01:08:18,439 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-19 01:08:18,439 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-19 01:08:18,440 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-19 01:08:18,440 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:08:18,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:08:18,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:08:18,445 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 01:08:18,497 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:08:18,497 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:08:18,498 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:08:18,498 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:08:18,499 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:08:18,500 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:08:18,500 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:08:18,501 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:08:18,501 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:08:18,501 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:08:18,501 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:08:18,502 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:08:18,502 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:08:18,502 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:08:18,502 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:08:18,502 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:08:18,503 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:08:18,503 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:08:18,503 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:08:18,503 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:08:18,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:08:18,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:08:18,505 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:08:18,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:08:18,506 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:08:18,506 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:08:18,506 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:08:18,506 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:08:18,506 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:08:18,507 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=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; [2020-08-19 01:08:18,858 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:08:18,882 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:08:18,886 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:08:18,888 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:08:18,889 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:08:18,890 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-19 01:08:18,970 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ececa10f/9729f1fd9ee04a0d892e881dbd7f2eb0/FLAGb51889f75 [2020-08-19 01:08:19,443 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:08:19,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_b5_o10.c [2020-08-19 01:08:19,451 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ececa10f/9729f1fd9ee04a0d892e881dbd7f2eb0/FLAGb51889f75 [2020-08-19 01:08:19,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5ececa10f/9729f1fd9ee04a0d892e881dbd7f2eb0 [2020-08-19 01:08:19,838 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:08:19,839 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:08:19,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:08:19,841 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:08:19,845 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:08:19,846 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:08:19" (1/1) ... [2020-08-19 01:08:19,849 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c4f371a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:19, skipping insertion in model container [2020-08-19 01:08:19,849 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:08:19" (1/1) ... [2020-08-19 01:08:19,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:08:19,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:08:20,141 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:08:20,149 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:08:20,171 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:08:20,189 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:08:20,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:20 WrapperNode [2020-08-19 01:08:20,190 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:08:20,191 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:08:20,191 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:08:20,191 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:08:20,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:20" (1/1) ... [2020-08-19 01:08:20,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:20" (1/1) ... [2020-08-19 01:08:20,308 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:20" (1/1) ... [2020-08-19 01:08:20,309 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:20" (1/1) ... [2020-08-19 01:08:20,313 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:20" (1/1) ... [2020-08-19 01:08:20,316 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:20" (1/1) ... [2020-08-19 01:08:20,318 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:20" (1/1) ... [2020-08-19 01:08:20,323 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:08:20,324 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:08:20,324 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:08:20,324 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:08:20,325 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:08:20,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:08:20,388 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:08:20,388 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-19 01:08:20,388 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-19 01:08:20,389 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:08:20,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 01:08:20,389 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:08:20,389 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-19 01:08:20,389 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-19 01:08:20,389 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:08:20,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:08:20,390 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:08:20,564 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:08:20,564 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-19 01:08:20,568 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:08:20 BoogieIcfgContainer [2020-08-19 01:08:20,568 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:08:20,569 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:08:20,570 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:08:20,573 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:08:20,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:08:19" (1/3) ... [2020-08-19 01:08:20,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a6966b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:08:20, skipping insertion in model container [2020-08-19 01:08:20,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:08:20" (2/3) ... [2020-08-19 01:08:20,574 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@11a6966b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:08:20, skipping insertion in model container [2020-08-19 01:08:20,575 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:08:20" (3/3) ... [2020-08-19 01:08:20,576 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_b5_o10.c [2020-08-19 01:08:20,599 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:08:20,617 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:08:20,656 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:08:20,698 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:08:20,698 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:08:20,698 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:08:20,699 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:08:20,699 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:08:20,699 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:08:20,699 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:08:20,699 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:08:20,721 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states. [2020-08-19 01:08:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-19 01:08:20,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:20,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:20,729 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:20,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:20,735 INFO L82 PathProgramCache]: Analyzing trace with hash 128923731, now seen corresponding path program 1 times [2020-08-19 01:08:20,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:20,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856167107] [2020-08-19 01:08:20,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:20,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:20,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:20,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:20,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:08:20,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856167107] [2020-08-19 01:08:20,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:08:20,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:08:20,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400348668] [2020-08-19 01:08:21,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:08:21,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:21,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:08:21,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:08:21,016 INFO L87 Difference]: Start difference. First operand 28 states. Second operand 5 states. [2020-08-19 01:08:21,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:21,070 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-08-19 01:08:21,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:08:21,072 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-19 01:08:21,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:21,081 INFO L225 Difference]: With dead ends: 40 [2020-08-19 01:08:21,082 INFO L226 Difference]: Without dead ends: 26 [2020-08-19 01:08:21,085 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 [2020-08-19 01:08:21,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-19 01:08:21,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-19 01:08:21,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-19 01:08:21,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-19 01:08:21,125 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 13 [2020-08-19 01:08:21,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:21,125 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-19 01:08:21,125 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:08:21,126 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-19 01:08:21,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 01:08:21,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:21,128 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] [2020-08-19 01:08:21,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:08:21,129 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:21,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:21,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1945633833, now seen corresponding path program 1 times [2020-08-19 01:08:21,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:21,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1372836294] [2020-08-19 01:08:21,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:21,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:21,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:21,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:08:21,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1372836294] [2020-08-19 01:08:21,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:08:21,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:08:21,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355208162] [2020-08-19 01:08:21,306 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:08:21,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:21,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:08:21,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:08:21,308 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2020-08-19 01:08:21,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:21,341 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-08-19 01:08:21,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:08:21,342 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-19 01:08:21,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:21,343 INFO L225 Difference]: With dead ends: 32 [2020-08-19 01:08:21,344 INFO L226 Difference]: Without dead ends: 28 [2020-08-19 01:08:21,345 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 [2020-08-19 01:08:21,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-19 01:08:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-19 01:08:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-19 01:08:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2020-08-19 01:08:21,353 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2020-08-19 01:08:21,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:21,354 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2020-08-19 01:08:21,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:08:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2020-08-19 01:08:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 01:08:21,355 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:21,355 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] [2020-08-19 01:08:21,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:08:21,356 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:21,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1974262984, now seen corresponding path program 1 times [2020-08-19 01:08:21,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:21,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138324317] [2020-08-19 01:08:21,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:21,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:21,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:21,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:08:21,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138324317] [2020-08-19 01:08:21,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:08:21,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 01:08:21,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344971867] [2020-08-19 01:08:21,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 01:08:21,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:21,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 01:08:21,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:08:21,562 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 8 states. [2020-08-19 01:08:21,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:21,630 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-19 01:08:21,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 01:08:21,631 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-08-19 01:08:21,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:21,632 INFO L225 Difference]: With dead ends: 48 [2020-08-19 01:08:21,632 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 01:08:21,634 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 [2020-08-19 01:08:21,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 01:08:21,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-19 01:08:21,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 01:08:21,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-08-19 01:08:21,642 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-08-19 01:08:21,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:21,642 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-08-19 01:08:21,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 01:08:21,643 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-08-19 01:08:21,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 01:08:21,644 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:21,644 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:21,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:08:21,645 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:21,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:21,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1451784300, now seen corresponding path program 1 times [2020-08-19 01:08:21,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:21,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570478874] [2020-08-19 01:08:21,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:21,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:21,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,801 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 01:08:21,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570478874] [2020-08-19 01:08:21,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:08:21,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:08:21,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193349791] [2020-08-19 01:08:21,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:08:21,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:21,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:08:21,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:08:21,805 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 5 states. [2020-08-19 01:08:21,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:21,834 INFO L93 Difference]: Finished difference Result 50 states and 57 transitions. [2020-08-19 01:08:21,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 01:08:21,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-08-19 01:08:21,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:21,836 INFO L225 Difference]: With dead ends: 50 [2020-08-19 01:08:21,837 INFO L226 Difference]: Without dead ends: 36 [2020-08-19 01:08:21,837 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 [2020-08-19 01:08:21,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-19 01:08:21,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-08-19 01:08:21,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-19 01:08:21,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-08-19 01:08:21,846 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2020-08-19 01:08:21,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:21,847 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-08-19 01:08:21,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:08:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-08-19 01:08:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 01:08:21,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:21,849 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:21,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:08:21,849 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:21,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:21,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1255270795, now seen corresponding path program 1 times [2020-08-19 01:08:21,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:21,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924391842] [2020-08-19 01:08:21,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:21,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:21,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-19 01:08:22,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924391842] [2020-08-19 01:08:22,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:22,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 01:08:22,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44527948] [2020-08-19 01:08:22,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 01:08:22,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:22,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 01:08:22,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-08-19 01:08:22,163 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 11 states. [2020-08-19 01:08:22,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:22,279 INFO L93 Difference]: Finished difference Result 64 states and 73 transitions. [2020-08-19 01:08:22,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 01:08:22,280 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-08-19 01:08:22,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:22,283 INFO L225 Difference]: With dead ends: 64 [2020-08-19 01:08:22,283 INFO L226 Difference]: Without dead ends: 44 [2020-08-19 01:08:22,284 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 [2020-08-19 01:08:22,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-19 01:08:22,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-08-19 01:08:22,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-19 01:08:22,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-08-19 01:08:22,301 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-08-19 01:08:22,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:22,302 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-08-19 01:08:22,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 01:08:22,302 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-08-19 01:08:22,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-19 01:08:22,303 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:22,304 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] [2020-08-19 01:08:22,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 01:08:22,304 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:22,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:22,305 INFO L82 PathProgramCache]: Analyzing trace with hash 709659056, now seen corresponding path program 1 times [2020-08-19 01:08:22,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:22,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348385414] [2020-08-19 01:08:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:22,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:22,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,616 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 01:08:22,617 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348385414] [2020-08-19 01:08:22,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:22,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 01:08:22,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801000386] [2020-08-19 01:08:22,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 01:08:22,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 01:08:22,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-08-19 01:08:22,619 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 14 states. [2020-08-19 01:08:22,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:22,781 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-08-19 01:08:22,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 01:08:22,781 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 34 [2020-08-19 01:08:22,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:22,782 INFO L225 Difference]: With dead ends: 72 [2020-08-19 01:08:22,783 INFO L226 Difference]: Without dead ends: 52 [2020-08-19 01:08:22,784 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 [2020-08-19 01:08:22,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-19 01:08:22,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-08-19 01:08:22,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-19 01:08:22,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2020-08-19 01:08:22,791 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 34 [2020-08-19 01:08:22,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:22,792 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2020-08-19 01:08:22,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 01:08:22,792 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2020-08-19 01:08:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 01:08:22,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:22,796 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] [2020-08-19 01:08:22,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 01:08:22,797 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:22,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:22,797 INFO L82 PathProgramCache]: Analyzing trace with hash -797786941, now seen corresponding path program 2 times [2020-08-19 01:08:22,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:22,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419481296] [2020-08-19 01:08:22,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:22,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:22,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:23,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,218 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-19 01:08:23,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419481296] [2020-08-19 01:08:23,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:23,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 01:08:23,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721392824] [2020-08-19 01:08:23,221 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 01:08:23,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:23,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 01:08:23,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-08-19 01:08:23,223 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand 17 states. [2020-08-19 01:08:23,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:23,448 INFO L93 Difference]: Finished difference Result 80 states and 89 transitions. [2020-08-19 01:08:23,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 01:08:23,449 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 41 [2020-08-19 01:08:23,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:23,451 INFO L225 Difference]: With dead ends: 80 [2020-08-19 01:08:23,451 INFO L226 Difference]: Without dead ends: 60 [2020-08-19 01:08:23,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2020-08-19 01:08:23,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-19 01:08:23,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-08-19 01:08:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 01:08:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-19 01:08:23,459 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 41 [2020-08-19 01:08:23,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:23,460 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-19 01:08:23,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 01:08:23,460 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-19 01:08:23,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-19 01:08:23,461 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:23,461 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] [2020-08-19 01:08:23,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 01:08:23,462 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:23,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:23,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1496626328, now seen corresponding path program 2 times [2020-08-19 01:08:23,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:23,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [265663963] [2020-08-19 01:08:23,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:23,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:23,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-19 01:08:23,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [265663963] [2020-08-19 01:08:23,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:23,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 01:08:23,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092967340] [2020-08-19 01:08:23,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 01:08:23,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:23,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 01:08:23,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-19 01:08:23,930 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 20 states. [2020-08-19 01:08:24,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:24,199 INFO L93 Difference]: Finished difference Result 90 states and 99 transitions. [2020-08-19 01:08:24,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 01:08:24,200 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-08-19 01:08:24,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:24,201 INFO L225 Difference]: With dead ends: 90 [2020-08-19 01:08:24,201 INFO L226 Difference]: Without dead ends: 70 [2020-08-19 01:08:24,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-19 01:08:24,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-19 01:08:24,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2020-08-19 01:08:24,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-19 01:08:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-08-19 01:08:24,210 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 48 [2020-08-19 01:08:24,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:24,210 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-08-19 01:08:24,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 01:08:24,211 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-08-19 01:08:24,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 01:08:24,212 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:24,212 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:24,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 01:08:24,212 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:24,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:24,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1464480251, now seen corresponding path program 3 times [2020-08-19 01:08:24,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:24,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [896139529] [2020-08-19 01:08:24,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:24,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:24,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:24,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:24,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:24,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:24,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:24,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:24,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:24,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:24,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:24,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:24,685 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-19 01:08:24,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [896139529] [2020-08-19 01:08:24,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:24,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 01:08:24,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922026509] [2020-08-19 01:08:24,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 01:08:24,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:24,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 01:08:24,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-19 01:08:24,699 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 20 states. [2020-08-19 01:08:24,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:24,982 INFO L93 Difference]: Finished difference Result 94 states and 102 transitions. [2020-08-19 01:08:24,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 01:08:24,982 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 55 [2020-08-19 01:08:24,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:24,984 INFO L225 Difference]: With dead ends: 94 [2020-08-19 01:08:24,984 INFO L226 Difference]: Without dead ends: 76 [2020-08-19 01:08:24,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-19 01:08:24,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-19 01:08:24,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2020-08-19 01:08:24,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-19 01:08:24,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2020-08-19 01:08:24,993 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 55 [2020-08-19 01:08:24,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:24,993 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2020-08-19 01:08:24,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 01:08:24,993 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2020-08-19 01:08:24,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-19 01:08:24,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:08:24,995 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:08:24,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 01:08:24,995 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:08:24,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:08:24,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1405297280, now seen corresponding path program 3 times [2020-08-19 01:08:24,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:08:24,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349522261] [2020-08-19 01:08:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:08:25,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:25,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:08:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:25,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 01:08:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:25,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:25,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:25,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:25,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:25,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:25,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:25,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:25,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:25,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-19 01:08:25,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:08:25,481 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-19 01:08:25,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349522261] [2020-08-19 01:08:25,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:08:25,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 01:08:25,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232821629] [2020-08-19 01:08:25,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 01:08:25,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:08:25,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 01:08:25,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-08-19 01:08:25,485 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand 20 states. [2020-08-19 01:08:25,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:08:25,836 INFO L93 Difference]: Finished difference Result 82 states and 87 transitions. [2020-08-19 01:08:25,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 01:08:25,836 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 62 [2020-08-19 01:08:25,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:08:25,837 INFO L225 Difference]: With dead ends: 82 [2020-08-19 01:08:25,837 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 01:08:25,838 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=543, Unknown=0, NotChecked=0, Total=600 [2020-08-19 01:08:25,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 01:08:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 01:08:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 01:08:25,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 01:08:25,839 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 62 [2020-08-19 01:08:25,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:08:25,840 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 01:08:25,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 01:08:25,840 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 01:08:25,840 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 01:08:25,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 01:08:25,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 01:08:25,867 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 01:08:25,867 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 01:08:25,867 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-19 01:08:25,867 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-19 01:08:25,867 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-08-19 01:08:25,867 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-08-19 01:08:25,868 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 14 19) no Hoare annotation was computed. [2020-08-19 01:08:25,868 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 14 19) the Hoare annotation is: true [2020-08-19 01:08:25,868 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 14 19) no Hoare annotation was computed. [2020-08-19 01:08:25,868 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 01:08:25,868 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 01:08:25,868 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 01:08:25,869 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 01:08:25,869 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 25) no Hoare annotation was computed. [2020-08-19 01:08:25,869 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 21 27) the Hoare annotation is: true [2020-08-19 01:08:25,869 INFO L268 CegarLoopResult]: For program point L25(line 25) no Hoare annotation was computed. [2020-08-19 01:08:25,869 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 21 27) no Hoare annotation was computed. [2020-08-19 01:08:25,869 INFO L268 CegarLoopResult]: For program point L24(lines 24 26) no Hoare annotation was computed. [2020-08-19 01:08:25,869 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-19 01:08:25,870 INFO L268 CegarLoopResult]: For program point L23-1(line 23) no Hoare annotation was computed. [2020-08-19 01:08:25,870 INFO L268 CegarLoopResult]: For program point L24-2(lines 21 27) no Hoare annotation was computed. [2020-08-19 01:08:25,870 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 12) no Hoare annotation was computed. [2020-08-19 01:08:25,870 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 12) no Hoare annotation was computed. [2020-08-19 01:08:25,870 INFO L268 CegarLoopResult]: For program point L10(line 10) no Hoare annotation was computed. [2020-08-19 01:08:25,870 INFO L271 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: true [2020-08-19 01:08:25,870 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-19 01:08:25,871 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-19 01:08:25,871 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 12) the Hoare annotation is: true [2020-08-19 01:08:25,877 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:08:25 BoogieIcfgContainer [2020-08-19 01:08:25,877 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:08:25,879 INFO L168 Benchmark]: Toolchain (without parser) took 6039.45 ms. Allocated memory was 138.4 MB in the beginning and 293.1 MB in the end (delta: 154.7 MB). Free memory was 101.8 MB in the beginning and 252.2 MB in the end (delta: -150.4 MB). Peak memory consumption was 4.3 MB. Max. memory is 7.1 GB. [2020-08-19 01:08:25,880 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 01:08:25,881 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.33 ms. Allocated memory is still 138.4 MB. Free memory was 101.6 MB in the beginning and 92.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-19 01:08:25,882 INFO L168 Benchmark]: Boogie Preprocessor took 132.32 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 92.0 MB in the beginning and 180.0 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-08-19 01:08:25,882 INFO L168 Benchmark]: RCFGBuilder took 244.78 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 166.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-19 01:08:25,883 INFO L168 Benchmark]: TraceAbstraction took 5307.42 ms. Allocated memory was 201.3 MB in the beginning and 293.1 MB in the end (delta: 91.8 MB). Free memory was 166.2 MB in the beginning and 252.2 MB in the end (delta: -86.1 MB). Peak memory consumption was 5.7 MB. Max. memory is 7.1 GB. [2020-08-19 01:08:25,887 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.4 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 350.33 ms. Allocated memory is still 138.4 MB. Free memory was 101.6 MB in the beginning and 92.0 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 132.32 ms. Allocated memory was 138.4 MB in the beginning and 201.3 MB in the end (delta: 62.9 MB). Free memory was 92.0 MB in the beginning and 180.0 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * RCFGBuilder took 244.78 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 166.8 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5307.42 ms. Allocated memory was 201.3 MB in the beginning and 293.1 MB in the end (delta: 91.8 MB). Free memory was 166.2 MB in the beginning and 252.2 MB in the end (delta: -86.1 MB). Peak memory consumption was 5.7 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: 5.1s, OverallIterations: 10, TraceHistogramMax: 4, AutomataDifference: 1.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 323 SDtfs, 58 SDslu, 3296 SDs, 0 SdLazy, 1115 SolverSat, 13 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 256 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 2.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=70occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 62 StatesRemovedByMinimization, 8 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, 2.9s InterpolantComputationTime, 347 NumberOfCodeBlocks, 347 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 337 ConstructedInterpolants, 0 QuantifiedInterpolants, 50267 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 10 InterpolantComputations, 4 PerfectInterpolantSequences, 118/206 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...