/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:08:07,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:08:07,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:08:07,506 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 18:08:07,506 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 18:08:07,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 18:08:07,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 18:08:07,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 18:08:07,523 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 18:08:07,527 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 18:08:07,528 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 18:08:07,530 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 18:08:07,530 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:08:07,533 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:08:07,535 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:08:07,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:08:07,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:08:07,540 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:08:07,542 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:08:07,552 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:08:07,554 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:08:07,556 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:08:07,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:08:07,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:08:07,570 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 18:08:07,570 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 18:08:07,570 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 18:08:07,571 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 18:08:07,575 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 18:08:07,576 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 18:08:07,576 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 18:08:07,579 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 18:08:07,580 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 18:08:07,580 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 18:08:07,581 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 18:08:07,582 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 18:08:07,582 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 18:08:07,583 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 18:08:07,583 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 18:08:07,583 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 18:08:07,585 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 18:08:07,586 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 18:08:07,633 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:08:07,633 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:08:07,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:08:07,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:08:07,636 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:08:07,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:08:07,636 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:08:07,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:08:07,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:08:07,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:08:07,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:08:07,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:08:07,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:08:07,639 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:08:07,639 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:08:07,639 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:08:07,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:08:07,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:08:07,640 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:08:07,640 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:08:07,640 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:08:07,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:08:07,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:08:07,641 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:08:07,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:08:07,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:08:07,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:08:07,641 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:08:07,641 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:08:07,642 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-08-21 18:08:07,979 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:08:07,998 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:08:08,004 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:08:08,006 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:08:08,006 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:08:08,007 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2020-08-21 18:08:08,084 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/310ba21f0/d1e30efe9a5f47d1bb950f926b7ec065/FLAG6baecef66 [2020-08-21 18:08:08,502 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:08:08,503 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2020-08-21 18:08:08,510 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/310ba21f0/d1e30efe9a5f47d1bb950f926b7ec065/FLAG6baecef66 [2020-08-21 18:08:08,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/310ba21f0/d1e30efe9a5f47d1bb950f926b7ec065 [2020-08-21 18:08:08,889 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:08:08,890 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:08:08,891 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:08:08,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:08:08,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:08:08,897 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:08:08" (1/1) ... [2020-08-21 18:08:08,901 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79d9afb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:08:08, skipping insertion in model container [2020-08-21 18:08:08,901 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:08:08" (1/1) ... [2020-08-21 18:08:08,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:08:08,928 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:08:09,164 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:08:09,169 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:08:09,190 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:08:09,207 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:08:09,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:08:09 WrapperNode [2020-08-21 18:08:09,209 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:08:09,210 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:08:09,210 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:08:09,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:08:09,224 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:08:09" (1/1) ... [2020-08-21 18:08:09,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:08:09" (1/1) ... [2020-08-21 18:08:09,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:08:09" (1/1) ... [2020-08-21 18:08:09,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:08:09" (1/1) ... [2020-08-21 18:08:09,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:08:09" (1/1) ... [2020-08-21 18:08:09,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:08:09" (1/1) ... [2020-08-21 18:08:09,320 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:08:09" (1/1) ... [2020-08-21 18:08:09,321 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:08:09,322 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:08:09,322 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:08:09,322 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:08:09,323 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:08:09" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:08:09,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:08:09,389 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:08:09,390 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 18:08:09,391 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-21 18:08:09,392 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:08:09,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:08:09,392 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:08:09,392 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 18:08:09,392 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-21 18:08:09,392 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:08:09,392 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:08:09,393 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:08:09,557 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:08:09,558 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 18:08:09,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:08:09 BoogieIcfgContainer [2020-08-21 18:08:09,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:08:09,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:08:09,563 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:08:09,566 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:08:09,566 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:08:08" (1/3) ... [2020-08-21 18:08:09,567 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6a0898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:08:09, skipping insertion in model container [2020-08-21 18:08:09,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:08:09" (2/3) ... [2020-08-21 18:08:09,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e6a0898 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:08:09, skipping insertion in model container [2020-08-21 18:08:09,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:08:09" (3/3) ... [2020-08-21 18:08:09,570 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2020-08-21 18:08:09,579 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:08:09,585 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:08:09,598 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:08:09,621 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:08:09,621 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:08:09,621 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:08:09,621 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:08:09,622 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:08:09,622 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:08:09,622 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:08:09,622 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:08:09,640 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-08-21 18:08:09,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 18:08:09,645 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:09,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:08:09,646 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:09,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:09,652 INFO L82 PathProgramCache]: Analyzing trace with hash -550894517, now seen corresponding path program 1 times [2020-08-21 18:08:09,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:09,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854111868] [2020-08-21 18:08:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:09,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:09,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:09,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:09,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:08:09,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854111868] [2020-08-21 18:08:09,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:08:09,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 18:08:09,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249100401] [2020-08-21 18:08:09,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 18:08:09,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:09,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 18:08:09,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 18:08:09,917 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-08-21 18:08:10,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:10,019 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-08-21 18:08:10,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 18:08:10,021 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 18:08:10,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:10,031 INFO L225 Difference]: With dead ends: 36 [2020-08-21 18:08:10,032 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 18:08:10,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-21 18:08:10,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 18:08:10,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 18:08:10,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 18:08:10,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-21 18:08:10,077 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2020-08-21 18:08:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:10,077 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-21 18:08:10,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 18:08:10,078 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-21 18:08:10,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 18:08:10,079 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:10,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:08:10,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:08:10,080 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:10,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:10,080 INFO L82 PathProgramCache]: Analyzing trace with hash 40504409, now seen corresponding path program 1 times [2020-08-21 18:08:10,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:10,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321938464] [2020-08-21 18:08:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:10,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:10,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:10,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:10,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:10,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 18:08:10,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321938464] [2020-08-21 18:08:10,218 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:08:10,218 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 18:08:10,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058699420] [2020-08-21 18:08:10,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 18:08:10,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:10,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 18:08:10,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 18:08:10,222 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-21 18:08:10,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:10,311 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-08-21 18:08:10,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 18:08:10,312 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-21 18:08:10,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:10,314 INFO L225 Difference]: With dead ends: 33 [2020-08-21 18:08:10,314 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 18:08:10,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:08:10,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 18:08:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-21 18:08:10,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 18:08:10,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-08-21 18:08:10,324 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-08-21 18:08:10,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:10,324 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-08-21 18:08:10,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 18:08:10,324 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-08-21 18:08:10,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:08:10,326 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:10,326 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] [2020-08-21 18:08:10,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:08:10,327 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:10,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:10,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1029702107, now seen corresponding path program 1 times [2020-08-21 18:08:10,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:10,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1320973283] [2020-08-21 18:08:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:10,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:10,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:10,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:10,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:10,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:10,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 18:08:10,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1320973283] [2020-08-21 18:08:10,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:08:10,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 18:08:10,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002405124] [2020-08-21 18:08:10,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 18:08:10,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:10,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 18:08:10,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 18:08:10,493 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-08-21 18:08:10,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:10,587 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-08-21 18:08:10,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 18:08:10,588 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-08-21 18:08:10,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:10,590 INFO L225 Difference]: With dead ends: 39 [2020-08-21 18:08:10,590 INFO L226 Difference]: Without dead ends: 35 [2020-08-21 18:08:10,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-08-21 18:08:10,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-21 18:08:10,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-08-21 18:08:10,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 18:08:10,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-21 18:08:10,600 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-08-21 18:08:10,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:10,601 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-21 18:08:10,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 18:08:10,601 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-21 18:08:10,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 18:08:10,603 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:10,603 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:08:10,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:08:10,604 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:10,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:10,604 INFO L82 PathProgramCache]: Analyzing trace with hash -559715991, now seen corresponding path program 1 times [2020-08-21 18:08:10,605 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:10,605 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217649956] [2020-08-21 18:08:10,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:10,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:10,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:10,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:10,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:10,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:10,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:10,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:10,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 18:08:10,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217649956] [2020-08-21 18:08:10,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:08:10,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 18:08:10,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718253364] [2020-08-21 18:08:10,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 18:08:10,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:10,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 18:08:10,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 18:08:10,840 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 9 states. [2020-08-21 18:08:10,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:10,938 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-08-21 18:08:10,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 18:08:10,939 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-08-21 18:08:10,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:10,940 INFO L225 Difference]: With dead ends: 45 [2020-08-21 18:08:10,940 INFO L226 Difference]: Without dead ends: 41 [2020-08-21 18:08:10,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:08:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-21 18:08:10,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-08-21 18:08:10,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 18:08:10,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-21 18:08:10,950 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 31 [2020-08-21 18:08:10,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:10,951 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-21 18:08:10,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 18:08:10,951 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-21 18:08:10,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 18:08:10,952 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:10,953 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:08:10,953 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:08:10,953 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:10,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:10,954 INFO L82 PathProgramCache]: Analyzing trace with hash 2003326827, now seen corresponding path program 2 times [2020-08-21 18:08:10,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:10,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618494895] [2020-08-21 18:08:10,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:10,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:11,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:11,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:11,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:11,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:11,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:11,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,177 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-08-21 18:08:11,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618494895] [2020-08-21 18:08:11,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:08:11,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 18:08:11,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405124725] [2020-08-21 18:08:11,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 18:08:11,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:11,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 18:08:11,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 18:08:11,180 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 10 states. [2020-08-21 18:08:11,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:11,290 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-08-21 18:08:11,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 18:08:11,291 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-08-21 18:08:11,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:11,293 INFO L225 Difference]: With dead ends: 51 [2020-08-21 18:08:11,293 INFO L226 Difference]: Without dead ends: 47 [2020-08-21 18:08:11,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:08:11,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-21 18:08:11,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-08-21 18:08:11,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 18:08:11,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-21 18:08:11,302 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 37 [2020-08-21 18:08:11,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:11,303 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-21 18:08:11,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 18:08:11,303 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-21 18:08:11,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 18:08:11,304 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:11,305 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:08:11,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:08:11,305 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:11,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:11,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1197899385, now seen corresponding path program 2 times [2020-08-21 18:08:11,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:11,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1256249222] [2020-08-21 18:08:11,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:11,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:11,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:11,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,616 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 18:08:11,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1256249222] [2020-08-21 18:08:11,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:08:11,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 18:08:11,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426786035] [2020-08-21 18:08:11,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 18:08:11,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:11,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 18:08:11,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:08:11,619 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 15 states. [2020-08-21 18:08:11,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:11,730 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-08-21 18:08:11,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 18:08:11,730 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-21 18:08:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:11,732 INFO L225 Difference]: With dead ends: 57 [2020-08-21 18:08:11,732 INFO L226 Difference]: Without dead ends: 53 [2020-08-21 18:08:11,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-21 18:08:11,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-21 18:08:11,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2020-08-21 18:08:11,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 18:08:11,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-21 18:08:11,742 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 43 [2020-08-21 18:08:11,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:11,743 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-21 18:08:11,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 18:08:11,743 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-21 18:08:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 18:08:11,745 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:11,746 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:08:11,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:08:11,746 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:11,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:11,747 INFO L82 PathProgramCache]: Analyzing trace with hash 706413819, now seen corresponding path program 3 times [2020-08-21 18:08:11,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:11,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761321305] [2020-08-21 18:08:11,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:11,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:11,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:11,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:11,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:11,985 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-08-21 18:08:11,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761321305] [2020-08-21 18:08:11,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:08:11,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 18:08:11,986 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417460852] [2020-08-21 18:08:11,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 18:08:11,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:11,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 18:08:11,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-21 18:08:11,989 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 12 states. [2020-08-21 18:08:12,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:12,291 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2020-08-21 18:08:12,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 18:08:12,293 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-08-21 18:08:12,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:12,297 INFO L225 Difference]: With dead ends: 104 [2020-08-21 18:08:12,297 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 18:08:12,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-08-21 18:08:12,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 18:08:12,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-08-21 18:08:12,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 18:08:12,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-21 18:08:12,320 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 49 [2020-08-21 18:08:12,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:12,321 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-21 18:08:12,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 18:08:12,322 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-21 18:08:12,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 18:08:12,324 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:08:12,324 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:08:12,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:08:12,325 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:08:12,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:08:12,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1492956279, now seen corresponding path program 3 times [2020-08-21 18:08:12,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:08:12,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002248798] [2020-08-21 18:08:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:08:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:12,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:08:12,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:12,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 18:08:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:12,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:12,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:12,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:12,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:12,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:12,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:12,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:12,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:12,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:12,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:12,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 18:08:12,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:08:12,601 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 27 proven. 6 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-08-21 18:08:12,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002248798] [2020-08-21 18:08:12,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 18:08:12,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 18:08:12,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978781241] [2020-08-21 18:08:12,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 18:08:12,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:08:12,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 18:08:12,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-08-21 18:08:12,606 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 13 states. [2020-08-21 18:08:12,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:08:12,910 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2020-08-21 18:08:12,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 18:08:12,910 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-08-21 18:08:12,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:08:12,911 INFO L225 Difference]: With dead ends: 72 [2020-08-21 18:08:12,911 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 18:08:12,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-08-21 18:08:12,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 18:08:12,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 18:08:12,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 18:08:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 18:08:12,914 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2020-08-21 18:08:12,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:08:12,914 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 18:08:12,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 18:08:12,915 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 18:08:12,915 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 18:08:12,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:08:12,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 18:08:12,998 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 18:08:12,998 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:08:12,998 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= id2_~x |id2_#in~x|) [2020-08-21 18:08:12,998 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-08-21 18:08:12,998 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-08-21 18:08:12,998 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 12 15) no Hoare annotation was computed. [2020-08-21 18:08:12,999 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 12 15) the Hoare annotation is: true [2020-08-21 18:08:12,999 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 12 15) no Hoare annotation was computed. [2020-08-21 18:08:12,999 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:08:12,999 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 18:08:12,999 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 18:08:12,999 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:08:12,999 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2020-08-21 18:08:13,000 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 17 23) the Hoare annotation is: true [2020-08-21 18:08:13,000 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 23) no Hoare annotation was computed. [2020-08-21 18:08:13,000 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-08-21 18:08:13,000 INFO L268 CegarLoopResult]: For program point L20(lines 20 22) no Hoare annotation was computed. [2020-08-21 18:08:13,000 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (<= main_~input~0 5) (<= 5 main_~input~0)) [2020-08-21 18:08:13,000 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-08-21 18:08:13,000 INFO L268 CegarLoopResult]: For program point L20-2(lines 17 23) no Hoare annotation was computed. [2020-08-21 18:08:13,001 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 10) no Hoare annotation was computed. [2020-08-21 18:08:13,001 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 10) no Hoare annotation was computed. [2020-08-21 18:08:13,001 INFO L264 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-08-21 18:08:13,001 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 18:08:13,001 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-21 18:08:13,001 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 10) the Hoare annotation is: true [2020-08-21 18:08:13,007 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:08:13 BoogieIcfgContainer [2020-08-21 18:08:13,007 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:08:13,010 INFO L168 Benchmark]: Toolchain (without parser) took 4118.65 ms. Allocated memory was 140.0 MB in the beginning and 245.9 MB in the end (delta: 105.9 MB). Free memory was 103.7 MB in the beginning and 168.0 MB in the end (delta: -64.3 MB). Peak memory consumption was 41.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:08:13,011 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 18:08:13,012 INFO L168 Benchmark]: CACSL2BoogieTranslator took 317.83 ms. Allocated memory is still 140.0 MB. Free memory was 103.3 MB in the beginning and 93.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-21 18:08:13,012 INFO L168 Benchmark]: Boogie Preprocessor took 112.11 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.9 MB in the beginning and 181.5 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-08-21 18:08:13,013 INFO L168 Benchmark]: RCFGBuilder took 239.89 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 168.8 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-21 18:08:13,014 INFO L168 Benchmark]: TraceAbstraction took 3444.23 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 168.1 MB in the beginning and 168.0 MB in the end (delta: 124.8 kB). Peak memory consumption was 43.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:08:13,018 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 317.83 ms. Allocated memory is still 140.0 MB. Free memory was 103.3 MB in the beginning and 93.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 112.11 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 93.9 MB in the beginning and 181.5 MB in the end (delta: -87.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 239.89 ms. Allocated memory is still 202.4 MB. Free memory was 181.5 MB in the beginning and 168.8 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3444.23 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 168.1 MB in the beginning and 168.0 MB in the end (delta: 124.8 kB). Peak memory consumption was 43.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 21]: 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, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.2s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 173 SDtfs, 115 SDslu, 1090 SDs, 0 SdLazy, 722 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 184 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 58 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 21 PreInvPairs, 21 NumberOfFragments, 19 HoareAnnotationTreeSize, 21 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 9 FomulaSimplificationsInter, 90 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 272 NumberOfCodeBlocks, 272 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 264 ConstructedInterpolants, 0 QuantifiedInterpolants, 26688 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 2 PerfectInterpolantSequences, 135/180 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...