/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 produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --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-invgen/large_const.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:31:55,655 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:31:55,660 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:31:55,704 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:31:55,705 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:31:55,713 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:31:55,716 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:31:55,720 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:31:55,723 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:31:55,727 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:31:55,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:31:55,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:31:55,729 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:31:55,733 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:31:55,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:31:55,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:31:55,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:31:55,741 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:31:55,743 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:31:55,754 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:31:55,757 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:31:55,758 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:31:55,759 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:31:55,760 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:31:55,773 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:31:55,774 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:31:55,774 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:31:55,775 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:31:55,776 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:31:55,783 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:31:55,783 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:31:55,786 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:31:55,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:31:55,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:31:55,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:31:55,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:31:55,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:31:55,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:31:55,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:31:55,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:31:55,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:31:55,799 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 [2020-09-21 11:31:55,836 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:31:55,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:31:55,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:31:55,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:31:55,839 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:31:55,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:31:55,839 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:31:55,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:31:55,839 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:31:55,840 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:31:55,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:31:55,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:31:55,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:31:55,840 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:31:55,841 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:31:55,841 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:31:55,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:31:55,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:31:55,842 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:31:55,842 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:31:55,842 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:31:55,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:31:55,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:31:55,843 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:31:55,843 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:31:55,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:31:55,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:31:55,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:31:55,844 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:31:55,844 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 -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;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;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:31:56,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:31:56,315 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:31:56,322 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:31:56,324 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:31:56,324 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:31:56,326 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/large_const.i [2020-09-21 11:31:56,407 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eee7bea95/eb34cf062ad840e1a75fa9d5c1ec7746/FLAG562b9ce7f [2020-09-21 11:31:56,998 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:31:56,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/large_const.i [2020-09-21 11:31:57,007 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eee7bea95/eb34cf062ad840e1a75fa9d5c1ec7746/FLAG562b9ce7f [2020-09-21 11:31:57,367 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eee7bea95/eb34cf062ad840e1a75fa9d5c1ec7746 [2020-09-21 11:31:57,382 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:31:57,389 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:31:57,390 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:57,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:31:57,394 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:31:57,395 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:57" (1/1) ... [2020-09-21 11:31:57,400 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8ea5cdf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:57, skipping insertion in model container [2020-09-21 11:31:57,400 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:57" (1/1) ... [2020-09-21 11:31:57,409 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:31:57,438 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:31:57,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:57,653 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:31:57,674 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:57,689 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:31:57,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:57 WrapperNode [2020-09-21 11:31:57,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:57,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:31:57,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:31:57,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:31:57,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:57" (1/1) ... [2020-09-21 11:31:57,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:57" (1/1) ... [2020-09-21 11:31:57,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:57" (1/1) ... [2020-09-21 11:31:57,793 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:57" (1/1) ... [2020-09-21 11:31:57,805 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:57" (1/1) ... [2020-09-21 11:31:57,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:57" (1/1) ... [2020-09-21 11:31:57,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:57" (1/1) ... [2020-09-21 11:31:57,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:31:57,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:31:57,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:31:57,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:31:57,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:57" (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 [2020-09-21 11:31:57,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:31:57,893 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:31:57,894 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:31:57,894 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:31:57,894 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:31:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:31:57,894 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:31:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:31:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:31:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:31:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:31:57,895 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:31:57,896 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:31:58,194 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:31:58,194 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 11:31:58,199 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:58 BoogieIcfgContainer [2020-09-21 11:31:58,199 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:31:58,201 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:31:58,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:31:58,205 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:31:58,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:31:57" (1/3) ... [2020-09-21 11:31:58,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742b7202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:58, skipping insertion in model container [2020-09-21 11:31:58,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:57" (2/3) ... [2020-09-21 11:31:58,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@742b7202 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:58, skipping insertion in model container [2020-09-21 11:31:58,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:58" (3/3) ... [2020-09-21 11:31:58,209 INFO L109 eAbstractionObserver]: Analyzing ICFG large_const.i [2020-09-21 11:31:58,222 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:31:58,233 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:31:58,256 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:31:58,290 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:31:58,290 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:31:58,291 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:31:58,291 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:31:58,291 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:31:58,291 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:31:58,291 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:31:58,291 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:31:58,312 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-09-21 11:31:58,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-21 11:31:58,319 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:58,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:58,321 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:58,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:58,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1992019723, now seen corresponding path program 1 times [2020-09-21 11:31:58,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:58,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400282878] [2020-09-21 11:31:58,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:58,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:58,497 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:58,497 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:58,497 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:58,497 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:58,498 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-09-21 11:31:58,498 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:58,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 11:31:58,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:58,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:58,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:58,499 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:31:58,499 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:58,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:58,595 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:58,595 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:58,595 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:58,596 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:58,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:58,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:58,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:58,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:58,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:58,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:58,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:58,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:58,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:58,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400282878] [2020-09-21 11:31:58,608 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:58,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:31:58,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843895554] [2020-09-21 11:31:58,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:31:58,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:58,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:31:58,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:58,643 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-09-21 11:31:58,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:58,757 INFO L93 Difference]: Finished difference Result 48 states and 63 transitions. [2020-09-21 11:31:58,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:31:58,760 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-09-21 11:31:58,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:58,773 INFO L225 Difference]: With dead ends: 48 [2020-09-21 11:31:58,774 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 11:31:58,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:58,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 11:31:58,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-09-21 11:31:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 11:31:58,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-09-21 11:31:58,838 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2020-09-21 11:31:58,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:58,839 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-09-21 11:31:58,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:31:58,839 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-09-21 11:31:58,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 11:31:58,840 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:58,841 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:58,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:31:58,841 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:58,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:58,842 INFO L82 PathProgramCache]: Analyzing trace with hash 2018685173, now seen corresponding path program 1 times [2020-09-21 11:31:58,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:58,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144022016] [2020-09-21 11:31:58,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:58,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:58,933 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:58,933 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:58,933 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:58,937 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:58,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 11:31:58,938 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:58,938 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-21 11:31:58,938 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:58,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:31:58,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:58,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-21 11:31:58,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-21 11:31:59,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:59,092 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:59,092 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:59,093 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:59,093 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:59,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:59,094 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:59,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:59,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:59,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:59,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:59,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:59,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144022016] [2020-09-21 11:31:59,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:59,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:31:59,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606169298] [2020-09-21 11:31:59,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:31:59,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:59,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:31:59,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:59,105 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 7 states. [2020-09-21 11:31:59,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:59,243 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2020-09-21 11:31:59,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:31:59,244 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-09-21 11:31:59,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:59,248 INFO L225 Difference]: With dead ends: 41 [2020-09-21 11:31:59,248 INFO L226 Difference]: Without dead ends: 39 [2020-09-21 11:31:59,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:31:59,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-21 11:31:59,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2020-09-21 11:31:59,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-21 11:31:59,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-09-21 11:31:59,267 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 16 [2020-09-21 11:31:59,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:59,268 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-09-21 11:31:59,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:31:59,268 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-09-21 11:31:59,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 11:31:59,269 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:59,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:59,270 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:31:59,270 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:59,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:59,271 INFO L82 PathProgramCache]: Analyzing trace with hash 23130030, now seen corresponding path program 1 times [2020-09-21 11:31:59,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:59,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809040139] [2020-09-21 11:31:59,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:59,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:59,311 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:59,311 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:59,312 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:59,312 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:59,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:31:59,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:59,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 11:31:59,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:59,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:31:59,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:59,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:31:59,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:59,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:59,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:59,439 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:59,440 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:59,440 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:59,440 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:59,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:59,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:59,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:59,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:59,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:59,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:59,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:59,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:59,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:59,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809040139] [2020-09-21 11:31:59,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:59,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:31:59,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154052031] [2020-09-21 11:31:59,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:31:59,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:59,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:31:59,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:59,455 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 7 states. [2020-09-21 11:31:59,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:59,612 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-09-21 11:31:59,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:31:59,613 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-09-21 11:31:59,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:59,617 INFO L225 Difference]: With dead ends: 51 [2020-09-21 11:31:59,617 INFO L226 Difference]: Without dead ends: 49 [2020-09-21 11:31:59,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:31:59,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-21 11:31:59,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-09-21 11:31:59,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 11:31:59,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2020-09-21 11:31:59,639 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 17 [2020-09-21 11:31:59,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:59,640 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2020-09-21 11:31:59,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:31:59,640 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2020-09-21 11:31:59,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 11:31:59,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:59,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:59,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:31:59,643 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:59,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:59,643 INFO L82 PathProgramCache]: Analyzing trace with hash -786216596, now seen corresponding path program 1 times [2020-09-21 11:31:59,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:59,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182991584] [2020-09-21 11:31:59,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:59,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:59,704 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:59,705 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:59,705 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:59,705 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:59,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:31:59,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:59,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-21 11:31:59,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:59,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:31:59,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:31:59,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:31:59,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:59,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:59,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:59,767 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:59,767 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:59,767 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:59,767 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:59,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:59,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:59,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:59,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:59,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:59,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:59,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:59,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:59,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:59,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182991584] [2020-09-21 11:31:59,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:59,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:31:59,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682932569] [2020-09-21 11:31:59,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:31:59,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:59,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:31:59,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:31:59,774 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand 7 states. [2020-09-21 11:31:59,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:59,885 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2020-09-21 11:31:59,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:31:59,885 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2020-09-21 11:31:59,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:59,887 INFO L225 Difference]: With dead ends: 55 [2020-09-21 11:31:59,887 INFO L226 Difference]: Without dead ends: 53 [2020-09-21 11:31:59,888 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:31:59,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-21 11:31:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 42. [2020-09-21 11:31:59,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-21 11:31:59,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2020-09-21 11:31:59,898 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 17 [2020-09-21 11:31:59,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:59,899 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2020-09-21 11:31:59,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:31:59,899 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2020-09-21 11:31:59,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:31:59,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:59,900 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:59,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:31:59,901 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:59,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:59,901 INFO L82 PathProgramCache]: Analyzing trace with hash -986746962, now seen corresponding path program 1 times [2020-09-21 11:31:59,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:59,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808998323] [2020-09-21 11:31:59,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:59,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:59,926 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:59,926 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:59,926 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:59,926 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:59,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:31:59,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:59,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:31:59,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:59,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:31:59,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:31:59,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-21 11:31:59,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:59,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:59,953 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:59,954 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:59,954 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:59,954 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:59,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:59,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:59,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:31:59,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:59,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:59,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:59,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:59,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:59,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808998323] [2020-09-21 11:31:59,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:31:59,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:31:59,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437833856] [2020-09-21 11:31:59,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:31:59,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:59,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:31:59,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:31:59,960 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand 5 states. [2020-09-21 11:31:59,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:59,989 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-09-21 11:31:59,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:31:59,990 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-21 11:31:59,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:59,991 INFO L225 Difference]: With dead ends: 61 [2020-09-21 11:31:59,991 INFO L226 Difference]: Without dead ends: 29 [2020-09-21 11:31:59,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:31:59,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-21 11:31:59,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-09-21 11:31:59,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 11:31:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-09-21 11:31:59,998 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 20 [2020-09-21 11:31:59,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:59,999 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-09-21 11:31:59,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:31:59,999 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-09-21 11:31:59,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-21 11:32:00,000 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:00,000 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] [2020-09-21 11:32:00,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:32:00,000 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:00,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:00,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1470890089, now seen corresponding path program 1 times [2020-09-21 11:32:00,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:00,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [146690689] [2020-09-21 11:32:00,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:00,034 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:00,034 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:00,034 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:00,034 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:00,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-09-21 11:32:00,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:00,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-21 11:32:00,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:00,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:32:00,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:00,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:32:00,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:00,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:00,098 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:00,098 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:00,099 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:00,099 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:00,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:00,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:00,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:00,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:00,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:00,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:00,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:00,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:00,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-21 11:32:00,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:00,106 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:00,106 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:00,106 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:00,106 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:00,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:32:00,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:00,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:00,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:00,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:32:00,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:00,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:32:00,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:00,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:00,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [146690689] [2020-09-21 11:32:00,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:32:00,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:32:00,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336501328] [2020-09-21 11:32:00,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:32:00,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:00,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:32:00,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:32:00,115 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 8 states. [2020-09-21 11:32:00,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:00,237 INFO L93 Difference]: Finished difference Result 48 states and 51 transitions. [2020-09-21 11:32:00,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:32:00,237 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 23 [2020-09-21 11:32:00,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:00,238 INFO L225 Difference]: With dead ends: 48 [2020-09-21 11:32:00,239 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 11:32:00,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:32:00,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 11:32:00,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 36. [2020-09-21 11:32:00,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 11:32:00,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-09-21 11:32:00,248 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 23 [2020-09-21 11:32:00,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:00,248 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-09-21 11:32:00,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:32:00,248 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-09-21 11:32:00,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 11:32:00,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:00,250 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] [2020-09-21 11:32:00,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:32:00,250 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:00,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:00,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1116377200, now seen corresponding path program 1 times [2020-09-21 11:32:00,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:00,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960282783] [2020-09-21 11:32:00,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:00,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:00,268 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:00,268 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:00,268 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:00,269 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:00,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 11:32:00,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:00,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-21 11:32:00,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:00,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:32:00,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:32:00,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-09-21 11:32:00,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:00,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:00,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:00,298 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:00,298 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:00,298 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:00,299 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:00,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:00,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:00,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:00,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:00,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:00,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:00,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:00,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:00,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 11:32:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:00,307 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:00,307 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:00,307 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:00,308 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:00,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-21 11:32:00,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:00,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:00,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:00,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:32:00,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:00,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:32:00,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:00,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960282783] [2020-09-21 11:32:00,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:00,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:32:00,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336413381] [2020-09-21 11:32:00,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:32:00,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:00,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:32:00,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:00,317 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 5 states. [2020-09-21 11:32:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:00,361 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-09-21 11:32:00,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:32:00,362 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-21 11:32:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:00,362 INFO L225 Difference]: With dead ends: 44 [2020-09-21 11:32:00,362 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 11:32:00,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:32:00,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 11:32:00,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 11:32:00,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 11:32:00,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 11:32:00,365 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-09-21 11:32:00,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:00,365 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 11:32:00,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:32:00,365 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 11:32:00,365 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 11:32:00,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:32:00,369 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 11:32:00,699 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 28 [2020-09-21 11:32:00,734 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 11:32:00,734 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:32:00,734 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:32:00,735 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 11:32:00,735 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 11:32:00,735 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:32:00,735 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-21 11:32:00,735 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-21 11:32:00,735 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-09-21 11:32:00,735 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-21 11:32:00,736 INFO L264 CegarLoopResult]: At program point L35-2(lines 35 39) the Hoare annotation is: (let ((.cse0 (<= 4000 main_~c1~0)) (.cse4 (<= main_~n~0 main_~j~0)) (.cse1 (<= 2000 main_~c2~0)) (.cse2 (<= main_~n~0 1)) (.cse3 (<= 10000 main_~c3~0))) (or (and .cse0 (<= 1 main_~i~0) (< 0 main_~k~0) .cse1 (<= main_~n~0 (+ main_~j~0 1)) .cse2 .cse3) (and .cse4 (<= main_~i~0 0) (<= main_~n~0 0)) (and .cse0 .cse4 (<= main_~n~0 main_~i~0) .cse1 .cse2 .cse3))) [2020-09-21 11:32:00,736 INFO L268 CegarLoopResult]: For program point L35-3(lines 35 39) no Hoare annotation was computed. [2020-09-21 11:32:00,736 INFO L268 CegarLoopResult]: For program point L29(lines 29 32) no Hoare annotation was computed. [2020-09-21 11:32:00,737 INFO L268 CegarLoopResult]: For program point L27(lines 27 32) no Hoare annotation was computed. [2020-09-21 11:32:00,737 INFO L264 CegarLoopResult]: At program point L29-2(lines 23 33) the Hoare annotation is: (let ((.cse0 (<= 4000 main_~c1~0)) (.cse1 (<= 2000 main_~c2~0)) (.cse2 (<= 10000 main_~c3~0))) (or (and .cse0 (<= 1 main_~i~0) (< 0 main_~k~0) .cse1 (<= main_~n~0 1) .cse2) (and .cse0 (<= main_~i~0 0) (<= 10000 (+ main_~c3~0 main_~k~0)) (<= 0 main_~i~0) (<= 4000 (+ main_~c1~0 main_~k~0)) (<= 2000 (+ main_~c2~0 main_~k~0)) .cse1 .cse2))) [2020-09-21 11:32:00,737 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 41) no Hoare annotation was computed. [2020-09-21 11:32:00,737 INFO L268 CegarLoopResult]: For program point L23-2(lines 23 33) no Hoare annotation was computed. [2020-09-21 11:32:00,737 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 41) no Hoare annotation was computed. [2020-09-21 11:32:00,738 INFO L264 CegarLoopResult]: At program point L36(line 36) the Hoare annotation is: (and (<= 4000 main_~c1~0) (<= 1 main_~i~0) (< 0 main_~k~0) (<= 2000 main_~c2~0) (<= main_~n~0 (+ main_~j~0 1)) (<= main_~n~0 1) (<= 10000 main_~c3~0)) [2020-09-21 11:32:00,738 INFO L268 CegarLoopResult]: For program point L36-1(line 36) no Hoare annotation was computed. [2020-09-21 11:32:00,738 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 41) the Hoare annotation is: true [2020-09-21 11:32:00,738 INFO L268 CegarLoopResult]: For program point L26(line 26) no Hoare annotation was computed. [2020-09-21 11:32:00,738 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-21 11:32:00,738 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-21 11:32:00,739 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-21 11:32:00,739 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-21 11:32:00,739 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-21 11:32:00,739 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-21 11:32:00,739 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-21 11:32:00,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:32:00 BoogieIcfgContainer [2020-09-21 11:32:00,767 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:32:00,770 INFO L168 Benchmark]: Toolchain (without parser) took 3385.81 ms. Allocated memory was 139.5 MB in the beginning and 245.9 MB in the end (delta: 106.4 MB). Free memory was 101.1 MB in the beginning and 204.5 MB in the end (delta: -103.5 MB). Peak memory consumption was 115.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:00,771 INFO L168 Benchmark]: CDTParser took 0.91 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:32:00,772 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.47 ms. Allocated memory is still 139.5 MB. Free memory was 100.4 MB in the beginning and 90.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:00,773 INFO L168 Benchmark]: Boogie Preprocessor took 126.51 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 90.8 MB in the beginning and 180.4 MB in the end (delta: -89.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:00,774 INFO L168 Benchmark]: RCFGBuilder took 381.91 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 166.2 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:00,775 INFO L168 Benchmark]: TraceAbstraction took 2567.02 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 165.6 MB in the beginning and 204.5 MB in the end (delta: -39.0 MB). Peak memory consumption was 117.0 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:00,779 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.91 ms. Allocated memory is still 139.5 MB. Free memory was 119.7 MB in the beginning and 119.5 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 300.47 ms. Allocated memory is still 139.5 MB. Free memory was 100.4 MB in the beginning and 90.8 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.51 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 90.8 MB in the beginning and 180.4 MB in the end (delta: -89.6 MB). Peak memory consumption was 13.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 381.91 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 166.2 MB in the end (delta: 14.2 MB). Peak memory consumption was 14.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2567.02 ms. Allocated memory was 202.4 MB in the beginning and 245.9 MB in the end (delta: 43.5 MB). Free memory was 165.6 MB in the beginning and 204.5 MB in the end (delta: -39.0 MB). Peak memory consumption was 117.0 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: 23]: Loop Invariant Derived loop invariant: (((((4000 <= c1 && 1 <= i) && 0 < k) && 2000 <= c2) && n <= 1) && 10000 <= c3) || (((((((4000 <= c1 && i <= 0) && 10000 <= c3 + k) && 0 <= i) && 4000 <= c1 + k) && 2000 <= c2 + k) && 2000 <= c2) && 10000 <= c3) - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((((((4000 <= c1 && 1 <= i) && 0 < k) && 2000 <= c2) && n <= j + 1) && n <= 1) && 10000 <= c3) || ((n <= j && i <= 0) && n <= 0)) || (((((4000 <= c1 && n <= j) && n <= i) && 2000 <= c2) && n <= 1) && 10000 <= c3) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2.0s, OverallIterations: 7, TraceHistogramMax: 2, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 164 SDtfs, 149 SDslu, 456 SDs, 0 SdLazy, 260 SolverSat, 59 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 80 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred 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: 0.1s AutomataMinimizationTime, 7 MinimizatonAttempts, 43 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 14 PreInvPairs, 24 NumberOfFragments, 134 HoareAnnotationTreeSize, 14 FomulaSimplifications, 1007 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 8 FomulaSimplificationsInter, 12 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 130 NumberOfCodeBlocks, 130 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 123 ConstructedInterpolants, 0 QuantifiedInterpolants, 5177 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 11/18 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...