/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 --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=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/loop-lit/gj2007b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:51:48,553 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:51:48,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:51:48,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:51:48,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:51:48,618 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:51:48,620 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:51:48,624 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:51:48,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:51:48,631 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:51:48,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:51:48,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:51:48,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:51:48,637 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:51:48,640 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:51:48,642 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:51:48,644 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:51:48,645 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:51:48,647 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:51:48,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:51:48,660 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:51:48,661 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:51:48,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:51:48,665 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:51:48,668 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:51:48,668 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:51:48,668 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:51:48,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:51:48,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:51:48,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:51:48,674 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:51:48,675 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:51:48,676 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:51:48,676 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:51:48,678 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:51:48,678 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:51:48,679 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:51:48,679 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:51:48,679 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:51:48,680 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:51:48,682 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:51:48,683 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 [2020-09-24 21:51:48,731 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:51:48,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:51:48,733 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:51:48,734 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:51:48,734 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:51:48,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:51:48,735 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:51:48,735 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:51:48,735 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:51:48,735 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:51:48,736 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:51:48,736 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:51:48,737 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:51:48,737 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:51:48,737 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:51:48,738 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:51:48,738 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:51:48,738 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:51:48,738 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:51:48,738 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:51:48,739 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:51:48,739 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:51:48,739 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:51:48,739 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:51:48,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:51:48,740 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:51:48,740 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:51:48,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:51:48,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:51:48,740 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.rcfgbuilder: Size of a code block -> SingleStatement 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 -> produce-proofs=true;produce-unsat-cores=true;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 -> produce-proofs=true;produce-unsat-cores=true;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 -> produce-proofs=true;produce-unsat-cores=true;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 -> produce-proofs=true;produce-unsat-cores=true;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 -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:51:49,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:51:49,210 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:51:49,215 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:51:49,217 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:51:49,218 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:51:49,219 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007b.i [2020-09-24 21:51:49,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc1283364/cf9b048a5cc64244a9a3d511ba2c7513/FLAG99ebf0f51 [2020-09-24 21:51:49,863 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:51:49,863 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/gj2007b.i [2020-09-24 21:51:49,870 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc1283364/cf9b048a5cc64244a9a3d511ba2c7513/FLAG99ebf0f51 [2020-09-24 21:51:50,235 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc1283364/cf9b048a5cc64244a9a3d511ba2c7513 [2020-09-24 21:51:50,248 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:51:50,254 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:51:50,255 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:51:50,255 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:51:50,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:51:50,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:51:50" (1/1) ... [2020-09-24 21:51:50,267 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1987833a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:50, skipping insertion in model container [2020-09-24 21:51:50,267 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:51:50" (1/1) ... [2020-09-24 21:51:50,277 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:51:50,307 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:51:50,516 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:51:50,522 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:51:50,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:51:50,560 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:51:50,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:50 WrapperNode [2020-09-24 21:51:50,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:51:50,562 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:51:50,562 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:51:50,562 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:51:50,577 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:50" (1/1) ... [2020-09-24 21:51:50,578 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:50" (1/1) ... [2020-09-24 21:51:50,583 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:50" (1/1) ... [2020-09-24 21:51:50,584 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:50" (1/1) ... [2020-09-24 21:51:50,587 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:50" (1/1) ... [2020-09-24 21:51:50,593 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:50" (1/1) ... [2020-09-24 21:51:50,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:50" (1/1) ... [2020-09-24 21:51:50,681 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:51:50,682 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:51:50,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:51:50,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:51:50,684 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:50" (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 [2020-09-24 21:51:50,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:51:50,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:51:50,758 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:51:50,759 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:51:50,759 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:51:50,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:51:50,759 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:51:50,759 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:51:50,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:51:50,760 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:51:50,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:51:50,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:51:50,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:51:50,967 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:51:50,968 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:51:50,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:51:50 BoogieIcfgContainer [2020-09-24 21:51:50,974 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:51:50,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:51:50,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:51:50,979 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:51:50,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:51:50" (1/3) ... [2020-09-24 21:51:50,980 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c9483cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:51:50, skipping insertion in model container [2020-09-24 21:51:50,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:51:50" (2/3) ... [2020-09-24 21:51:50,981 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c9483cf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:51:50, skipping insertion in model container [2020-09-24 21:51:50,981 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:51:50" (3/3) ... [2020-09-24 21:51:50,984 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007b.i [2020-09-24 21:51:50,996 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:51:51,008 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:51:51,038 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:51:51,072 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:51:51,073 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:51:51,073 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:51:51,073 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:51:51,073 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:51:51,074 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:51:51,074 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:51:51,074 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:51:51,100 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-24 21:51:51,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 21:51:51,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:51,110 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:51,110 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:51,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:51,119 INFO L82 PathProgramCache]: Analyzing trace with hash 1007675669, now seen corresponding path program 1 times [2020-09-24 21:51:51,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:51,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124960889] [2020-09-24 21:51:51,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:51,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:51,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:51,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:51,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:51,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 21:51:51,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:51:51,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 126 [2020-09-24 21:51:51,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:51,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:51:51,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:51:51,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:51:51,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:51:51,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:51,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:51,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:51,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:51,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:51,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:51,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:51:51,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:51,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:51,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:51,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:51,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:51,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124960889] [2020-09-24 21:51:51,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:51:51,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 21:51:51,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880388505] [2020-09-24 21:51:51,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:51:51,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:51,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:51:51,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:51:51,525 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-09-24 21:51:51,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:51,633 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2020-09-24 21:51:51,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:51:51,636 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-24 21:51:51,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:51,649 INFO L225 Difference]: With dead ends: 58 [2020-09-24 21:51:51,650 INFO L226 Difference]: Without dead ends: 37 [2020-09-24 21:51:51,654 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:51:51,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-09-24 21:51:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 34. [2020-09-24 21:51:51,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 21:51:51,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-09-24 21:51:51,704 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 14 [2020-09-24 21:51:51,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:51,705 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-09-24 21:51:51,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:51:51,706 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-09-24 21:51:51,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-24 21:51:51,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:51,707 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:51,707 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:51:51,708 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:51,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:51,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1988212296, now seen corresponding path program 1 times [2020-09-24 21:51:51,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:51,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454117462] [2020-09-24 21:51:51,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:51,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:51,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:52,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-24 21:51:52,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:51:52,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 286 [2020-09-24 21:51:52,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:52,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:51:52,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:51:52,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:51:52,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:52,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:52,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:52,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:52,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:52,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:52,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:51:52,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:52,103 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:52,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:52,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:52,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-24 21:51:52,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-24 21:51:52,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:52,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:52,153 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:51:52,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:52,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-24 21:51:52,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:51:52,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:52,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:51:52,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:52,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454117462] [2020-09-24 21:51:52,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:51:52,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 21:51:52,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636657517] [2020-09-24 21:51:52,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:51:52,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:52,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:51:52,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:51:52,176 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 6 states. [2020-09-24 21:51:52,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:52,304 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2020-09-24 21:51:52,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:51:52,305 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-09-24 21:51:52,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:52,309 INFO L225 Difference]: With dead ends: 54 [2020-09-24 21:51:52,310 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 21:51:52,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:51:52,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 21:51:52,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-09-24 21:51:52,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-24 21:51:52,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-09-24 21:51:52,330 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 19 [2020-09-24 21:51:52,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:52,330 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-09-24 21:51:52,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:51:52,331 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-09-24 21:51:52,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 21:51:52,332 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:52,332 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:52,332 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:51:52,333 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:52,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:52,333 INFO L82 PathProgramCache]: Analyzing trace with hash 2096508511, now seen corresponding path program 1 times [2020-09-24 21:51:52,333 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:52,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1998233432] [2020-09-24 21:51:52,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:52,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:52,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,498 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:52,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 21:51:52,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:51:52,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 154 [2020-09-24 21:51:52,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:52,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:51:52,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:51:52,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:51:52,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:52,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:52,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:52,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:52,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:52,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:51:52,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:52,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:52,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:52,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:52,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 13 [2020-09-24 21:51:52,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:52,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1998233432] [2020-09-24 21:51:52,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:52,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 21:51:52,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132977897] [2020-09-24 21:51:52,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:51:52,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:52,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:51:52,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:51:52,560 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-09-24 21:51:52,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:52,623 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-09-24 21:51:52,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 21:51:52,624 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-09-24 21:51:52,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:52,625 INFO L225 Difference]: With dead ends: 57 [2020-09-24 21:51:52,625 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 21:51:52,626 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:51:52,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 21:51:52,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2020-09-24 21:51:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-24 21:51:52,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2020-09-24 21:51:52,633 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 20 [2020-09-24 21:51:52,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:52,633 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2020-09-24 21:51:52,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:51:52,634 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2020-09-24 21:51:52,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-24 21:51:52,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:52,635 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:52,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:51:52,635 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:52,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:52,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1151527866, now seen corresponding path program 1 times [2020-09-24 21:51:52,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:52,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359344452] [2020-09-24 21:51:52,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:52,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:52,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:52,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-24 21:51:52,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:51:52,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 238 [2020-09-24 21:51:52,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:52,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:51:52,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 21:51:52,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 21:51:52,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:52,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:52,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:52,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:52,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:52,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:52,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:51:52,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:52,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:52,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:52,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:52,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:52,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:52,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359344452] [2020-09-24 21:51:52,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:52,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:51:52,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957116722] [2020-09-24 21:51:52,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:51:52,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:52,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:51:52,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:51:52,971 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand 7 states. [2020-09-24 21:51:53,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:53,072 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2020-09-24 21:51:53,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 21:51:53,073 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-09-24 21:51:53,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:53,074 INFO L225 Difference]: With dead ends: 44 [2020-09-24 21:51:53,074 INFO L226 Difference]: Without dead ends: 40 [2020-09-24 21:51:53,074 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:51:53,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-24 21:51:53,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-09-24 21:51:53,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 21:51:53,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-24 21:51:53,081 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 25 [2020-09-24 21:51:53,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:53,082 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-24 21:51:53,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:51:53,082 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-24 21:51:53,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 21:51:53,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:53,083 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:53,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:51:53,084 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:53,084 INFO L82 PathProgramCache]: Analyzing trace with hash -2086501752, now seen corresponding path program 1 times [2020-09-24 21:51:53,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:53,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2038625722] [2020-09-24 21:51:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:53,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:53,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:53,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:53,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-24 21:51:53,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:53,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-09-24 21:51:53,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 21:51:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-09-24 21:51:53,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-24 21:51:53,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:53,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:53,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:53,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:53,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:53,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:53,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:51:53,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:53,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:53,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:53,250 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:53,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:53,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-24 21:51:53,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:53,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:53,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:53,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-24 21:51:53,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:53,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 21:51:53,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:53,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:51:53,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:53,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:51:53,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:51:53,277 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-24 21:51:53,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2038625722] [2020-09-24 21:51:53,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:51:53,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-24 21:51:53,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102954762] [2020-09-24 21:51:53,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 21:51:53,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:53,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 21:51:53,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-24 21:51:53,279 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 6 states. [2020-09-24 21:51:53,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:53,357 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-09-24 21:51:53,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 21:51:53,357 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-09-24 21:51:53,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:53,358 INFO L225 Difference]: With dead ends: 43 [2020-09-24 21:51:53,358 INFO L226 Difference]: Without dead ends: 0 [2020-09-24 21:51:53,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-24 21:51:53,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-24 21:51:53,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-24 21:51:53,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-24 21:51:53,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-24 21:51:53,360 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2020-09-24 21:51:53,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:53,361 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-24 21:51:53,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 21:51:53,361 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-24 21:51:53,362 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-24 21:51:53,362 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:51:53,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-24 21:51:53,668 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-24 21:51:53,668 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-24 21:51:53,668 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-24 21:51:53,668 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-24 21:51:53,669 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-24 21:51:53,669 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-24 21:51:53,669 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-24 21:51:53,669 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-24 21:51:53,670 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-24 21:51:53,670 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-24 21:51:53,670 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-24 21:51:53,670 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 26) no Hoare annotation was computed. [2020-09-24 21:51:53,670 INFO L264 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 0))) (or (and .cse0 (<= main_~x~0 0)) (= main_~m~0 0) (and (<= 1 main_~x~0) (<= 1 main_~m~0) (or .cse0 (< main_~m~0 main_~n~0))))) [2020-09-24 21:51:53,671 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-09-24 21:51:53,671 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-24 21:51:53,671 INFO L264 CegarLoopResult]: At program point L17-2(lines 17 22) the Hoare annotation is: (let ((.cse0 (= main_~m~0 0)) (.cse1 (<= 1 main_~x~0))) (or (and .cse0 (= main_~x~0 0)) (and .cse1 .cse0) (and .cse1 (<= 1 main_~m~0) (or (<= main_~n~0 0) (< main_~m~0 main_~n~0))))) [2020-09-24 21:51:53,674 INFO L264 CegarLoopResult]: At program point L17-3(lines 17 22) the Hoare annotation is: (or (and (<= 0 main_~m~0) (<= main_~n~0 0)) (and (<= 1 main_~x~0) (< main_~m~0 main_~n~0) (<= 1 main_~m~0)) (= main_~m~0 0)) [2020-09-24 21:51:53,674 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 26) no Hoare annotation was computed. [2020-09-24 21:51:53,674 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 26) the Hoare annotation is: true [2020-09-24 21:51:53,674 INFO L268 CegarLoopResult]: For program point L24(line 24) no Hoare annotation was computed. [2020-09-24 21:51:53,674 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-24 21:51:53,675 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 20) no Hoare annotation was computed. [2020-09-24 21:51:53,675 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-09-24 21:51:53,675 INFO L268 CegarLoopResult]: For program point L18-2(line 18) no Hoare annotation was computed. [2020-09-24 21:51:53,675 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-24 21:51:53,675 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-24 21:51:53,675 INFO L268 CegarLoopResult]: For program point L18-4(line 18) no Hoare annotation was computed. [2020-09-24 21:51:53,676 INFO L268 CegarLoopResult]: For program point L18-5(lines 18 20) no Hoare annotation was computed. [2020-09-24 21:51:53,679 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-24 21:51:53,679 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-24 21:51:53,680 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-24 21:51:53,680 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-24 21:51:53,680 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-24 21:51:53,680 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-24 21:51:53,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 09:51:53 BoogieIcfgContainer [2020-09-24 21:51:53,724 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 21:51:53,728 INFO L168 Benchmark]: Toolchain (without parser) took 3476.86 ms. Allocated memory was 147.8 MB in the beginning and 233.3 MB in the end (delta: 85.5 MB). Free memory was 104.3 MB in the beginning and 107.8 MB in the end (delta: -3.5 MB). Peak memory consumption was 81.9 MB. Max. memory is 7.1 GB. [2020-09-24 21:51:53,729 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-24 21:51:53,730 INFO L168 Benchmark]: CACSL2BoogieTranslator took 306.57 ms. Allocated memory is still 147.8 MB. Free memory was 103.6 MB in the beginning and 94.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-24 21:51:53,732 INFO L168 Benchmark]: Boogie Preprocessor took 119.79 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 94.1 MB in the beginning and 184.0 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-09-24 21:51:53,733 INFO L168 Benchmark]: RCFGBuilder took 291.63 ms. Allocated memory is still 204.5 MB. Free memory was 184.0 MB in the beginning and 170.0 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-09-24 21:51:53,734 INFO L168 Benchmark]: TraceAbstraction took 2749.14 ms. Allocated memory was 204.5 MB in the beginning and 233.3 MB in the end (delta: 28.8 MB). Free memory was 170.0 MB in the beginning and 107.8 MB in the end (delta: 62.2 MB). Peak memory consumption was 91.0 MB. Max. memory is 7.1 GB. [2020-09-24 21:51:53,738 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 147.8 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 306.57 ms. Allocated memory is still 147.8 MB. Free memory was 103.6 MB in the beginning and 94.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 119.79 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 94.1 MB in the beginning and 184.0 MB in the end (delta: -89.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 291.63 ms. Allocated memory is still 204.5 MB. Free memory was 184.0 MB in the beginning and 170.0 MB in the end (delta: 14.0 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2749.14 ms. Allocated memory was 204.5 MB in the beginning and 233.3 MB in the end (delta: 28.8 MB). Free memory was 170.0 MB in the beginning and 107.8 MB in the end (delta: 62.2 MB). Peak memory consumption was 91.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: 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 - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: ((m == 0 && x == 0) || (1 <= x && m == 0)) || ((1 <= x && 1 <= m) && (n <= 0 || m < n)) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.2s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 126 SDtfs, 84 SDslu, 396 SDs, 0 SdLazy, 163 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=4, 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, 5 MinimizatonAttempts, 24 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 16 PreInvPairs, 26 NumberOfFragments, 80 HoareAnnotationTreeSize, 16 FomulaSimplifications, 37 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 16 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 108 NumberOfCodeBlocks, 108 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 103 ConstructedInterpolants, 0 QuantifiedInterpolants, 5655 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 3 PerfectInterpolantSequences, 13/17 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...