/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-industry-pattern/mod3.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:32:27,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:32:27,975 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:32:28,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:32:28,021 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:32:28,030 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:32:28,032 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:32:28,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:32:28,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:32:28,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:32:28,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:32:28,044 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:32:28,044 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:32:28,048 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:32:28,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:32:28,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:32:28,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:32:28,056 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:32:28,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:32:28,066 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:32:28,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:32:28,070 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:32:28,071 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:32:28,072 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:32:28,084 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:32:28,084 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:32:28,085 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:32:28,092 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:32:28,093 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:32:28,097 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:32:28,098 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:32:28,098 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:32:28,099 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:32:28,100 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:32:28,101 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:32:28,102 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:32:28,103 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:32:28,103 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:32:28,103 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:32:28,104 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:32:28,105 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:32:28,106 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 11:32:28,131 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:32:28,132 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:32:28,133 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:32:28,133 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:32:28,134 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:32:28,134 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:32:28,134 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:32:28,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:32:28,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:32:28,135 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:32:28,135 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:32:28,135 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:32:28,135 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:32:28,135 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:32:28,136 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:32:28,136 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:32:28,136 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:32:28,136 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:32:28,136 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:32:28,137 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:32:28,137 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:32:28,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:32:28,137 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:32:28,138 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:32:28,138 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:32:28,138 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:32:28,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:32:28,138 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:32:28,139 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:32:28,139 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 11:32:28,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:32:28,632 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:32:28,638 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:32:28,640 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:32:28,641 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:32:28,642 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/mod3.c [2020-09-21 11:32:28,732 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d34c3b952/7f8b145cd87b47c1ac9bf3a1bf5440ea/FLAG6e0f612fe [2020-09-21 11:32:29,307 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:32:29,308 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-industry-pattern/mod3.c [2020-09-21 11:32:29,317 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d34c3b952/7f8b145cd87b47c1ac9bf3a1bf5440ea/FLAG6e0f612fe [2020-09-21 11:32:29,662 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d34c3b952/7f8b145cd87b47c1ac9bf3a1bf5440ea [2020-09-21 11:32:29,677 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:32:29,685 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:32:29,690 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:29,698 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:32:29,702 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:32:29,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:29" (1/1) ... [2020-09-21 11:32:29,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bdd0a84 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:29, skipping insertion in model container [2020-09-21 11:32:29,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:32:29" (1/1) ... [2020-09-21 11:32:29,718 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:32:29,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:32:29,955 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:29,961 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:32:29,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:32:30,001 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:32:30,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:30 WrapperNode [2020-09-21 11:32:30,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:32:30,003 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:32:30,003 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:32:30,003 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:32:30,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:30" (1/1) ... [2020-09-21 11:32:30,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:30" (1/1) ... [2020-09-21 11:32:30,109 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:30" (1/1) ... [2020-09-21 11:32:30,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:30" (1/1) ... [2020-09-21 11:32:30,115 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:30" (1/1) ... [2020-09-21 11:32:30,122 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:30" (1/1) ... [2020-09-21 11:32:30,123 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:30" (1/1) ... [2020-09-21 11:32:30,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:32:30,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:32:30,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:32:30,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:32:30,132 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:30" (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 11:32:30,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:32:30,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:32:30,210 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:32:30,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:32:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:32:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:32:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:32:30,211 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:32:30,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:32:30,217 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:32:30,451 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:32:30,452 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 11:32:30,457 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:30 BoogieIcfgContainer [2020-09-21 11:32:30,457 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:32:30,458 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:32:30,459 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:32:30,462 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:32:30,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:32:29" (1/3) ... [2020-09-21 11:32:30,464 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83a5ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:30, skipping insertion in model container [2020-09-21 11:32:30,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:32:30" (2/3) ... [2020-09-21 11:32:30,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@83a5ada and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:32:30, skipping insertion in model container [2020-09-21 11:32:30,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:32:30" (3/3) ... [2020-09-21 11:32:30,468 INFO L109 eAbstractionObserver]: Analyzing ICFG mod3.c [2020-09-21 11:32:30,481 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:32:30,492 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:32:30,515 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:32:30,548 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:32:30,548 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:32:30,548 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:32:30,548 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:32:30,548 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:32:30,549 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:32:30,549 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:32:30,549 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:32:30,571 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-09-21 11:32:30,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 11:32:30,578 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:30,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:30,580 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:30,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:30,588 INFO L82 PathProgramCache]: Analyzing trace with hash 271538127, now seen corresponding path program 1 times [2020-09-21 11:32:30,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:30,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1092131774] [2020-09-21 11:32:30,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:30,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:30,717 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:30,717 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:30,717 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:30,718 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:30,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 11:32:30,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:30,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-21 11:32:30,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:32:30,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:30,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:30,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:30,750 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:30,750 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:30,750 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:30,750 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:30,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:30,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:30,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:30,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:30,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:30,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:30,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:30,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:30,758 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 11:32:30,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1092131774] [2020-09-21 11:32:30,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:30,761 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 11:32:30,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877906465] [2020-09-21 11:32:30,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 11:32:30,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:30,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 11:32:30,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:32:30,785 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-09-21 11:32:30,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:30,809 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2020-09-21 11:32:30,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 11:32:30,810 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-21 11:32:30,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:30,821 INFO L225 Difference]: With dead ends: 36 [2020-09-21 11:32:30,822 INFO L226 Difference]: Without dead ends: 16 [2020-09-21 11:32:30,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:32:30,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-21 11:32:30,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-21 11:32:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-21 11:32:30,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2020-09-21 11:32:30,867 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2020-09-21 11:32:30,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:30,868 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2020-09-21 11:32:30,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 11:32:30,868 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2020-09-21 11:32:30,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-21 11:32:30,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:30,869 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:30,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:32:30,870 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:30,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:30,871 INFO L82 PathProgramCache]: Analyzing trace with hash 183026044, now seen corresponding path program 1 times [2020-09-21 11:32:30,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:30,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459174054] [2020-09-21 11:32:30,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:30,922 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:30,923 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:30,923 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:30,923 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:30,924 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-21 11:32:30,924 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:30,924 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:32:30,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:30,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:32:30,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-21 11:32:30,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:32:30,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:31,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:31,003 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:31,003 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:31,003 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:31,004 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:31,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:31,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:31,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:31,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:31,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:31,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:31,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:31,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:31,010 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 11:32:31,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459174054] [2020-09-21 11:32:31,011 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:31,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:32:31,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407846262] [2020-09-21 11:32:31,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:32:31,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:31,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:32:31,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:32:31,015 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand 3 states. [2020-09-21 11:32:31,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:31,066 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2020-09-21 11:32:31,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:32:31,067 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-21 11:32:31,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:31,068 INFO L225 Difference]: With dead ends: 27 [2020-09-21 11:32:31,068 INFO L226 Difference]: Without dead ends: 21 [2020-09-21 11:32:31,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:32:31,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-09-21 11:32:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2020-09-21 11:32:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-21 11:32:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-09-21 11:32:31,077 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-09-21 11:32:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:31,078 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-09-21 11:32:31,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:32:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-09-21 11:32:31,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-21 11:32:31,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:31,080 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:31,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:32:31,081 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:31,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:31,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1587594336, now seen corresponding path program 1 times [2020-09-21 11:32:31,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:31,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44535972] [2020-09-21 11:32:31,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:31,455 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:31,456 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:31,456 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:31,456 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:31,460 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-21 11:32:31,460 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:31,460 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 303 [2020-09-21 11:32:31,461 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:31,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:32:31,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-21 11:32:31,461 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:32:31,462 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:32:31,827 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 21 [2020-09-21 11:32:31,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:31,850 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:31,850 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:31,850 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:31,851 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:31,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:31,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:31,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:32:31,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:31,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:31,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:31,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:31,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:31,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44535972] [2020-09-21 11:32:31,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:31,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:32:31,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314256115] [2020-09-21 11:32:31,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:32:31,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:31,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:32:31,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:31,882 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 5 states. [2020-09-21 11:32:36,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:36,159 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2020-09-21 11:32:36,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:32:36,160 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-21 11:32:36,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:36,161 INFO L225 Difference]: With dead ends: 40 [2020-09-21 11:32:36,161 INFO L226 Difference]: Without dead ends: 23 [2020-09-21 11:32:36,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:32:36,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-21 11:32:36,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-09-21 11:32:36,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-21 11:32:36,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-09-21 11:32:36,175 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 15 [2020-09-21 11:32:36,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:36,176 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-09-21 11:32:36,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:32:36,177 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-09-21 11:32:36,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-21 11:32:36,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:32:36,179 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:32:36,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:32:36,179 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:32:36,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:32:36,180 INFO L82 PathProgramCache]: Analyzing trace with hash 816455220, now seen corresponding path program 1 times [2020-09-21 11:32:36,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:32:36,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549929913] [2020-09-21 11:32:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:32:36,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:36,358 FATAL L256 erpolLogProxyWrapper]: Difference in size: 1 [2020-09-21 11:32:36,358 FATAL L256 erpolLogProxyWrapper]: Difference in depth: -1 [2020-09-21 11:32:36,358 FATAL L256 erpolLogProxyWrapper]: Difference in width: 1 [2020-09-21 11:32:36,359 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:36,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-21 11:32:36,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:36,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-09-21 11:32:36,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:36,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:32:36,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-09-21 11:32:36,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-21 11:32:36,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:36,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:32:36,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:32:36,525 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:32:36,526 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:32:36,526 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:32:36,526 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:32:36,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:32:36,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:32:36,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:32:36,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:32:36,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:32:36,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:32:36,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:32:36,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:32:36,532 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:32:36,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549929913] [2020-09-21 11:32:36,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:32:36,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 11:32:36,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332436659] [2020-09-21 11:32:36,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:32:36,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:32:36,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:32:36,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:32:36,535 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-09-21 11:32:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:32:40,803 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2020-09-21 11:32:40,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:32:40,804 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-21 11:32:40,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:32:40,805 INFO L225 Difference]: With dead ends: 40 [2020-09-21 11:32:40,805 INFO L226 Difference]: Without dead ends: 0 [2020-09-21 11:32:40,806 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 [2020-09-21 11:32:40,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-21 11:32:40,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-21 11:32:40,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-21 11:32:40,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-21 11:32:40,807 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-09-21 11:32:40,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:32:40,807 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-21 11:32:40,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:32:40,808 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-21 11:32:40,808 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-21 11:32:40,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:32:40,810 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-21 11:32:40,942 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-21 11:32:40,942 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:32:40,943 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-21 11:32:40,943 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-21 11:32:40,943 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-21 11:32:40,943 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-21 11:32:40,943 INFO L264 CegarLoopResult]: At program point L31(line 31) the Hoare annotation is: (<= main_~x~0 (let ((.cse0 (div main_~x~0 4294967296))) (+ (* 4294967296 .cse0) (* 3 (div (+ main_~x~0 (* .cse0 (- 4294967296))) 3))))) [2020-09-21 11:32:40,944 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 12 33) no Hoare annotation was computed. [2020-09-21 11:32:40,944 INFO L268 CegarLoopResult]: For program point L23(lines 23 26) no Hoare annotation was computed. [2020-09-21 11:32:40,944 INFO L264 CegarLoopResult]: At program point L23-2(lines 16 29) the Hoare annotation is: (or (and (<= (div main_~y~0 4294967296) 0) (<= 1 main_~y~0)) (<= main_~x~0 (let ((.cse0 (div main_~x~0 4294967296))) (+ (* 4294967296 .cse0) (* 3 (div (+ main_~x~0 (* .cse0 (- 4294967296))) 3)))))) [2020-09-21 11:32:40,944 INFO L268 CegarLoopResult]: For program point L17(lines 17 28) no Hoare annotation was computed. [2020-09-21 11:32:40,944 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 12 33) no Hoare annotation was computed. [2020-09-21 11:32:40,945 INFO L268 CegarLoopResult]: For program point L30(lines 30 31) no Hoare annotation was computed. [2020-09-21 11:32:40,946 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 12 33) the Hoare annotation is: true [2020-09-21 11:32:40,946 INFO L268 CegarLoopResult]: For program point L20(lines 20 27) no Hoare annotation was computed. [2020-09-21 11:32:40,946 INFO L268 CegarLoopResult]: For program point L16-1(lines 16 29) no Hoare annotation was computed. [2020-09-21 11:32:40,946 INFO L268 CegarLoopResult]: For program point L16-3(lines 12 33) no Hoare annotation was computed. [2020-09-21 11:32:40,947 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 10) the Hoare annotation is: true [2020-09-21 11:32:40,947 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 10) no Hoare annotation was computed. [2020-09-21 11:32:40,947 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-21 11:32:40,947 INFO L268 CegarLoopResult]: For program point L7(lines 7 8) no Hoare annotation was computed. [2020-09-21 11:32:40,947 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 10) no Hoare annotation was computed. [2020-09-21 11:32:40,948 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-21 11:32:40,981 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:32:40 BoogieIcfgContainer [2020-09-21 11:32:40,981 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:32:40,985 INFO L168 Benchmark]: Toolchain (without parser) took 11304.82 ms. Allocated memory was 138.4 MB in the beginning and 233.3 MB in the end (delta: 94.9 MB). Free memory was 101.3 MB in the beginning and 152.7 MB in the end (delta: -51.4 MB). Peak memory consumption was 43.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:40,988 INFO L168 Benchmark]: CDTParser took 0.84 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 11:32:40,992 INFO L168 Benchmark]: CACSL2BoogieTranslator took 313.01 ms. Allocated memory is still 138.4 MB. Free memory was 100.7 MB in the beginning and 91.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:40,996 INFO L168 Benchmark]: Boogie Preprocessor took 122.48 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 91.1 MB in the beginning and 180.5 MB in the end (delta: -89.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:41,002 INFO L168 Benchmark]: RCFGBuilder took 331.26 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 167.0 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:41,003 INFO L168 Benchmark]: TraceAbstraction took 10523.18 ms. Allocated memory was 201.9 MB in the beginning and 233.3 MB in the end (delta: 31.5 MB). Free memory was 167.0 MB in the beginning and 152.7 MB in the end (delta: 14.3 MB). Peak memory consumption was 45.8 MB. Max. memory is 7.1 GB. [2020-09-21 11:32:41,011 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.84 ms. Allocated memory is still 138.4 MB. Free memory was 120.0 MB in the beginning and 119.7 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 313.01 ms. Allocated memory is still 138.4 MB. Free memory was 100.7 MB in the beginning and 91.1 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.48 ms. Allocated memory was 138.4 MB in the beginning and 201.9 MB in the end (delta: 63.4 MB). Free memory was 91.1 MB in the beginning and 180.5 MB in the end (delta: -89.3 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 331.26 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 167.0 MB in the end (delta: 12.8 MB). Peak memory consumption was 12.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 10523.18 ms. Allocated memory was 201.9 MB in the beginning and 233.3 MB in the end (delta: 31.5 MB). Free memory was 167.0 MB in the beginning and 152.7 MB in the end (delta: 14.3 MB). Peak memory consumption was 45.8 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: 16]: Loop Invariant Derived loop invariant: (y / 4294967296 <= 0 && 1 <= y) || x <= 4294967296 * (x / 4294967296) + 3 * ((x + x / 4294967296 * -4294967296) / 3) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10.2s, OverallIterations: 4, TraceHistogramMax: 2, AutomataDifference: 8.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 84 SDtfs, 11 SDslu, 104 SDs, 0 SdLazy, 47 SolverSat, 8 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 8.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=23occurred in iteration=0, 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, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 12 PreInvPairs, 17 NumberOfFragments, 53 HoareAnnotationTreeSize, 12 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 87 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 54 NumberOfCodeBlocks, 54 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 50 ConstructedInterpolants, 0 QuantifiedInterpolants, 4482 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 PerfectInterpolantSequences, 4/4 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...