/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 --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 22:58:38,531 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:58:38,534 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:58:38,558 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:58:38,558 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:58:38,559 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:58:38,561 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:58:38,562 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:58:38,564 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:58:38,565 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:58:38,566 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:58:38,567 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:58:38,567 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:58:38,568 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:58:38,569 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:58:38,570 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:58:38,571 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:58:38,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:58:38,573 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:58:38,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:58:38,577 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:58:38,578 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:58:38,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:58:38,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:58:38,582 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 22:58:38,583 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 22:58:38,583 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 22:58:38,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 22:58:38,584 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 22:58:38,585 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 22:58:38,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 22:58:38,586 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 22:58:38,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 22:58:38,588 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 22:58:38,589 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 22:58:38,589 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 22:58:38,590 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 22:58:38,590 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 22:58:38,590 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:58:38,591 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:58:38,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:58:38,592 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 22:58:38,615 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:58:38,615 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:58:38,616 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:58:38,616 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:58:38,617 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:58:38,617 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:58:38,617 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:58:38,617 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:58:38,618 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:58:38,618 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:58:38,618 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:58:38,618 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:58:38,618 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:58:38,619 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:58:38,619 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:58:38,619 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:58:38,619 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:58:38,619 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:58:38,619 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:58:38,620 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:58:38,620 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:58:38,620 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:58:38,620 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:58:38,620 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:58:38,621 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:58:38,621 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:58:38,621 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:58:38,621 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:58:38,621 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:58:38,622 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=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2;log-additional-information=true; [2020-08-21 22:58:38,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:58:38,978 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:58:38,984 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:58:38,985 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:58:38,987 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:58:38,988 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2020-08-21 22:58:39,046 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bdfc8e064/73d5f49f8fd04b0f82fd1e7f91594b89/FLAG54037c796 [2020-08-21 22:58:39,515 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:58:39,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id2_i5_o5-2.c [2020-08-21 22:58:39,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bdfc8e064/73d5f49f8fd04b0f82fd1e7f91594b89/FLAG54037c796 [2020-08-21 22:58:39,914 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bdfc8e064/73d5f49f8fd04b0f82fd1e7f91594b89 [2020-08-21 22:58:39,922 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:58:39,924 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:58:39,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:58:39,925 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:58:39,934 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:58:39,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:58:39" (1/1) ... [2020-08-21 22:58:39,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2748618 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:39, skipping insertion in model container [2020-08-21 22:58:39,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:58:39" (1/1) ... [2020-08-21 22:58:39,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:58:39,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:58:40,159 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:58:40,162 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:58:40,176 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:58:40,188 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:58:40,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:40 WrapperNode [2020-08-21 22:58:40,188 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:58:40,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:58:40,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:58:40,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:58:40,202 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:40" (1/1) ... [2020-08-21 22:58:40,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:40" (1/1) ... [2020-08-21 22:58:40,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:40" (1/1) ... [2020-08-21 22:58:40,281 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:40" (1/1) ... [2020-08-21 22:58:40,289 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:40" (1/1) ... [2020-08-21 22:58:40,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:40" (1/1) ... [2020-08-21 22:58:40,293 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:40" (1/1) ... [2020-08-21 22:58:40,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:58:40,296 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:58:40,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:58:40,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:58:40,298 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:40" (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 22:58:40,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:58:40,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:58:40,356 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-21 22:58:40,357 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-21 22:58:40,357 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:58:40,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:58:40,357 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:58:40,357 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-21 22:58:40,357 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-21 22:58:40,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:58:40,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:58:40,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:58:40,531 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:58:40,532 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-21 22:58:40,535 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:58:40 BoogieIcfgContainer [2020-08-21 22:58:40,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:58:40,537 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:58:40,537 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:58:40,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:58:40,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:58:39" (1/3) ... [2020-08-21 22:58:40,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbba306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:58:40, skipping insertion in model container [2020-08-21 22:58:40,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:58:40" (2/3) ... [2020-08-21 22:58:40,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bbba306 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:58:40, skipping insertion in model container [2020-08-21 22:58:40,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:58:40" (3/3) ... [2020-08-21 22:58:40,545 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-2.c [2020-08-21 22:58:40,556 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:58:40,564 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:58:40,578 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:58:40,602 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:58:40,602 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:58:40,603 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:58:40,603 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:58:40,603 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:58:40,603 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:58:40,603 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:58:40,603 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:58:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-08-21 22:58:40,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 22:58:40,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:40,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:58:40,631 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:40,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:40,637 INFO L82 PathProgramCache]: Analyzing trace with hash -550894517, now seen corresponding path program 1 times [2020-08-21 22:58:40,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:40,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861287038] [2020-08-21 22:58:40,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:40,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:40,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:40,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:40,830 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 22:58:40,831 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861287038] [2020-08-21 22:58:40,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:58:40,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 22:58:40,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876072988] [2020-08-21 22:58:40,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:58:40,842 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:40,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:58:40,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:58:40,868 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 5 states. [2020-08-21 22:58:40,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:40,958 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-08-21 22:58:40,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:58:40,961 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-08-21 22:58:40,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:40,973 INFO L225 Difference]: With dead ends: 36 [2020-08-21 22:58:40,973 INFO L226 Difference]: Without dead ends: 24 [2020-08-21 22:58:40,977 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 22:58:40,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-21 22:58:41,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-21 22:58:41,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-21 22:58:41,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-08-21 22:58:41,036 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 13 [2020-08-21 22:58:41,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:41,037 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-08-21 22:58:41,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:58:41,037 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-08-21 22:58:41,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 22:58:41,039 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:41,040 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 22:58:41,040 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:58:41,041 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:41,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:41,041 INFO L82 PathProgramCache]: Analyzing trace with hash 40504409, now seen corresponding path program 1 times [2020-08-21 22:58:41,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:41,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406739472] [2020-08-21 22:58:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,205 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 22:58:41,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406739472] [2020-08-21 22:58:41,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:58:41,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 22:58:41,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811000671] [2020-08-21 22:58:41,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:58:41,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:41,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:58:41,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:58:41,211 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 7 states. [2020-08-21 22:58:41,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:41,301 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-08-21 22:58:41,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:58:41,303 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-08-21 22:58:41,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:41,304 INFO L225 Difference]: With dead ends: 33 [2020-08-21 22:58:41,304 INFO L226 Difference]: Without dead ends: 29 [2020-08-21 22:58:41,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:58:41,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-21 22:58:41,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-08-21 22:58:41,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-21 22:58:41,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-08-21 22:58:41,315 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 19 [2020-08-21 22:58:41,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:41,316 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-08-21 22:58:41,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:58:41,316 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-08-21 22:58:41,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 22:58:41,317 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:41,318 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 22:58:41,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:58:41,318 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:41,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:41,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1029702107, now seen corresponding path program 1 times [2020-08-21 22:58:41,319 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:41,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044176645] [2020-08-21 22:58:41,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:41,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:41,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:41,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,480 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 22:58:41,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044176645] [2020-08-21 22:58:41,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:41,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 22:58:41,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030928954] [2020-08-21 22:58:41,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:58:41,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:41,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:58:41,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:58:41,484 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-08-21 22:58:41,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:41,595 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-08-21 22:58:41,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:58:41,596 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-08-21 22:58:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:41,597 INFO L225 Difference]: With dead ends: 39 [2020-08-21 22:58:41,598 INFO L226 Difference]: Without dead ends: 35 [2020-08-21 22:58:41,599 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 22:58:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-21 22:58:41,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2020-08-21 22:58:41,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 22:58:41,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-21 22:58:41,608 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 25 [2020-08-21 22:58:41,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:41,609 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-21 22:58:41,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:58:41,609 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-21 22:58:41,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-21 22:58:41,611 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:41,611 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 22:58:41,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:58:41,612 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:41,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:41,613 INFO L82 PathProgramCache]: Analyzing trace with hash -559715991, now seen corresponding path program 1 times [2020-08-21 22:58:41,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:41,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759039362] [2020-08-21 22:58:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:41,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:41,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,796 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 22:58:41,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759039362] [2020-08-21 22:58:41,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:41,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 22:58:41,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307634531] [2020-08-21 22:58:41,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 22:58:41,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:41,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 22:58:41,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:58:41,799 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 9 states. [2020-08-21 22:58:41,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:41,902 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-08-21 22:58:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:58:41,902 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-08-21 22:58:41,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:41,904 INFO L225 Difference]: With dead ends: 45 [2020-08-21 22:58:41,904 INFO L226 Difference]: Without dead ends: 41 [2020-08-21 22:58:41,905 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:58:41,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-21 22:58:41,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-08-21 22:58:41,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 22:58:41,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-08-21 22:58:41,914 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 31 [2020-08-21 22:58:41,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:41,915 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-08-21 22:58:41,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 22:58:41,915 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-08-21 22:58:41,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-21 22:58:41,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:41,918 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 22:58:41,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:58:41,919 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:41,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:41,920 INFO L82 PathProgramCache]: Analyzing trace with hash 2003326827, now seen corresponding path program 2 times [2020-08-21 22:58:41,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:41,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475795835] [2020-08-21 22:58:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:41,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:41,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:42,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:42,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,146 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 22:58:42,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475795835] [2020-08-21 22:58:42,147 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:42,147 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:58:42,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709673711] [2020-08-21 22:58:42,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:58:42,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:42,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:58:42,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:58:42,149 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 10 states. [2020-08-21 22:58:42,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:42,267 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2020-08-21 22:58:42,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:58:42,268 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-08-21 22:58:42,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:42,269 INFO L225 Difference]: With dead ends: 51 [2020-08-21 22:58:42,270 INFO L226 Difference]: Without dead ends: 47 [2020-08-21 22:58:42,271 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 22:58:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-21 22:58:42,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 36. [2020-08-21 22:58:42,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 22:58:42,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-08-21 22:58:42,279 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 37 [2020-08-21 22:58:42,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:42,279 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-08-21 22:58:42,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:58:42,280 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-08-21 22:58:42,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 22:58:42,281 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:42,281 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 22:58:42,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:58:42,282 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:42,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1197899385, now seen corresponding path program 2 times [2020-08-21 22:58:42,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:42,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [546350588] [2020-08-21 22:58:42,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:42,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:42,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:42,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:42,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,609 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 22:58:42,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [546350588] [2020-08-21 22:58:42,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:42,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 22:58:42,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686173153] [2020-08-21 22:58:42,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 22:58:42,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:42,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 22:58:42,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-08-21 22:58:42,613 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 15 states. [2020-08-21 22:58:42,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:42,711 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2020-08-21 22:58:42,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 22:58:42,712 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 43 [2020-08-21 22:58:42,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:42,714 INFO L225 Difference]: With dead ends: 57 [2020-08-21 22:58:42,714 INFO L226 Difference]: Without dead ends: 53 [2020-08-21 22:58:42,715 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 22:58:42,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-21 22:58:42,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2020-08-21 22:58:42,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-21 22:58:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-21 22:58:42,724 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 43 [2020-08-21 22:58:42,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:42,724 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-21 22:58:42,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 22:58:42,725 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-21 22:58:42,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 22:58:42,727 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:42,727 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 22:58:42,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:58:42,727 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:42,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:42,728 INFO L82 PathProgramCache]: Analyzing trace with hash 706413819, now seen corresponding path program 3 times [2020-08-21 22:58:42,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:42,729 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611644080] [2020-08-21 22:58:42,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:42,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:42,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:42,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:42,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:42,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:42,949 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 22:58:42,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611644080] [2020-08-21 22:58:42,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:42,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:58:42,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331360937] [2020-08-21 22:58:42,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:58:42,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:42,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:58:42,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:58:42,952 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 12 states. [2020-08-21 22:58:43,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:43,295 INFO L93 Difference]: Finished difference Result 104 states and 125 transitions. [2020-08-21 22:58:43,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 22:58:43,296 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-08-21 22:58:43,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:43,298 INFO L225 Difference]: With dead ends: 104 [2020-08-21 22:58:43,298 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 22:58:43,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-08-21 22:58:43,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 22:58:43,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-08-21 22:58:43,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-21 22:58:43,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-08-21 22:58:43,309 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 49 [2020-08-21 22:58:43,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:43,310 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-08-21 22:58:43,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:58:43,310 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-08-21 22:58:43,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 22:58:43,311 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:58:43,311 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 22:58:43,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:58:43,312 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:58:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:58:43,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1492956279, now seen corresponding path program 3 times [2020-08-21 22:58:43,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:58:43,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925191523] [2020-08-21 22:58:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:58:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:43,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:58:43,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:43,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-21 22:58:43,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:43,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:43,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:43,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:43,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:43,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:43,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:43,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:43,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:43,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:43,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-21 22:58:43,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:58:43,598 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 22:58:43,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925191523] [2020-08-21 22:58:43,599 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:58:43,599 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 22:58:43,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400487742] [2020-08-21 22:58:43,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 22:58:43,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:58:43,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 22:58:43,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:58:43,603 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 13 states. [2020-08-21 22:58:43,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:58:43,928 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2020-08-21 22:58:43,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 22:58:43,929 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-08-21 22:58:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:58:43,929 INFO L225 Difference]: With dead ends: 72 [2020-08-21 22:58:43,930 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 22:58:43,931 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 22:58:43,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 22:58:43,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 22:58:43,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 22:58:43,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 22:58:43,933 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2020-08-21 22:58:43,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:58:43,933 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 22:58:43,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 22:58:43,933 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 22:58:43,933 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 22:58:43,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:58:43,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 22:58:44,056 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 22:58:44,057 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:58:44,057 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= id2_~x |id2_#in~x|) [2020-08-21 22:58:44,057 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-08-21 22:58:44,057 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-08-21 22:58:44,057 INFO L268 CegarLoopResult]: For program point id2EXIT(lines 12 15) no Hoare annotation was computed. [2020-08-21 22:58:44,058 INFO L271 CegarLoopResult]: At program point id2ENTRY(lines 12 15) the Hoare annotation is: true [2020-08-21 22:58:44,058 INFO L268 CegarLoopResult]: For program point id2FINAL(lines 12 15) no Hoare annotation was computed. [2020-08-21 22:58:44,058 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:58:44,058 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 22:58:44,058 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 22:58:44,058 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 22:58:44,058 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 21) no Hoare annotation was computed. [2020-08-21 22:58:44,059 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 17 23) the Hoare annotation is: true [2020-08-21 22:58:44,059 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 17 23) no Hoare annotation was computed. [2020-08-21 22:58:44,059 INFO L268 CegarLoopResult]: For program point L21(line 21) no Hoare annotation was computed. [2020-08-21 22:58:44,059 INFO L268 CegarLoopResult]: For program point L20(lines 20 22) no Hoare annotation was computed. [2020-08-21 22:58:44,059 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 22:58:44,059 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-08-21 22:58:44,059 INFO L268 CegarLoopResult]: For program point L20-2(lines 17 23) no Hoare annotation was computed. [2020-08-21 22:58:44,060 INFO L268 CegarLoopResult]: For program point idFINAL(lines 7 10) no Hoare annotation was computed. [2020-08-21 22:58:44,060 INFO L268 CegarLoopResult]: For program point idEXIT(lines 7 10) no Hoare annotation was computed. [2020-08-21 22:58:44,060 INFO L264 CegarLoopResult]: At program point L9(line 9) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-08-21 22:58:44,060 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-21 22:58:44,060 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-08-21 22:58:44,060 INFO L271 CegarLoopResult]: At program point idENTRY(lines 7 10) the Hoare annotation is: true [2020-08-21 22:58:44,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:58:44 BoogieIcfgContainer [2020-08-21 22:58:44,078 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:58:44,082 INFO L168 Benchmark]: Toolchain (without parser) took 4156.17 ms. Allocated memory was 136.8 MB in the beginning and 254.8 MB in the end (delta: 118.0 MB). Free memory was 99.8 MB in the beginning and 202.0 MB in the end (delta: -102.1 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. [2020-08-21 22:58:44,083 INFO L168 Benchmark]: CDTParser took 0.69 ms. Allocated memory is still 136.8 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 22:58:44,084 INFO L168 Benchmark]: CACSL2BoogieTranslator took 263.82 ms. Allocated memory is still 136.8 MB. Free memory was 99.6 MB in the beginning and 90.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-21 22:58:44,087 INFO L168 Benchmark]: Boogie Preprocessor took 106.80 ms. Allocated memory was 136.8 MB in the beginning and 198.7 MB in the end (delta: 61.9 MB). Free memory was 90.2 MB in the beginning and 177.7 MB in the end (delta: -87.5 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 22:58:44,087 INFO L168 Benchmark]: RCFGBuilder took 239.83 ms. Allocated memory is still 198.7 MB. Free memory was 177.7 MB in the beginning and 164.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-21 22:58:44,090 INFO L168 Benchmark]: TraceAbstraction took 3541.12 ms. Allocated memory was 198.7 MB in the beginning and 254.8 MB in the end (delta: 56.1 MB). Free memory was 164.1 MB in the beginning and 202.0 MB in the end (delta: -37.9 MB). Peak memory consumption was 18.2 MB. Max. memory is 7.1 GB. [2020-08-21 22:58:44,097 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.69 ms. Allocated memory is still 136.8 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 263.82 ms. Allocated memory is still 136.8 MB. Free memory was 99.6 MB in the beginning and 90.2 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 106.80 ms. Allocated memory was 136.8 MB in the beginning and 198.7 MB in the end (delta: 61.9 MB). Free memory was 90.2 MB in the beginning and 177.7 MB in the end (delta: -87.5 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 239.83 ms. Allocated memory is still 198.7 MB. Free memory was 177.7 MB in the beginning and 164.8 MB in the end (delta: 12.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3541.12 ms. Allocated memory was 198.7 MB in the beginning and 254.8 MB in the end (delta: 56.1 MB). Free memory was 164.1 MB in the beginning and 202.0 MB in the end (delta: -37.9 MB). Peak memory consumption was 18.2 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: 3.3s, OverallIterations: 8, TraceHistogramMax: 4, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 173 SDtfs, 115 SDslu, 1090 SDs, 0 SdLazy, 722 SolverSat, 42 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 184 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.0s 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...