/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 23:45:16,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 23:45:16,945 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 23:45:16,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 23:45:16,984 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 23:45:16,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 23:45:16,998 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 23:45:17,000 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 23:45:17,001 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 23:45:17,006 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 23:45:17,007 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 23:45:17,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 23:45:17,008 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 23:45:17,009 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 23:45:17,010 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 23:45:17,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 23:45:17,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 23:45:17,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 23:45:17,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 23:45:17,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 23:45:17,017 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 23:45:17,018 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 23:45:17,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 23:45:17,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 23:45:17,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 23:45:17,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 23:45:17,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 23:45:17,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 23:45:17,024 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 23:45:17,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 23:45:17,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 23:45:17,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 23:45:17,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 23:45:17,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 23:45:17,028 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 23:45:17,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 23:45:17,029 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 23:45:17,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 23:45:17,030 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 23:45:17,031 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 23:45:17,031 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 23:45:17,032 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 23:45:17,054 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 23:45:17,054 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 23:45:17,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 23:45:17,056 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 23:45:17,056 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 23:45:17,056 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 23:45:17,056 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 23:45:17,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 23:45:17,057 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 23:45:17,057 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 23:45:17,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 23:45:17,057 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 23:45:17,057 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 23:45:17,058 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 23:45:17,058 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 23:45:17,058 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 23:45:17,058 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 23:45:17,058 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 23:45:17,059 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 23:45:17,059 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 23:45:17,059 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 23:45:17,059 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:45:17,059 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 23:45:17,060 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 23:45:17,060 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 23:45:17,060 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 23:45:17,060 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 23:45:17,060 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 23:45:17,061 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 23:45:17,061 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-08-21 23:45:17,382 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 23:45:17,400 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 23:45:17,403 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 23:45:17,405 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 23:45:17,406 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 23:45:17,407 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-08-21 23:45:17,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/805fc43cb/ead2149e07354541b4475c2370c1acea/FLAG6034480c1 [2020-08-21 23:45:17,942 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 23:45:17,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector-loops/diamond_2-1.c [2020-08-21 23:45:17,950 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/805fc43cb/ead2149e07354541b4475c2370c1acea/FLAG6034480c1 [2020-08-21 23:45:18,320 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/805fc43cb/ead2149e07354541b4475c2370c1acea [2020-08-21 23:45:18,328 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 23:45:18,329 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 23:45:18,330 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 23:45:18,330 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 23:45:18,335 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 23:45:18,335 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:45:18" (1/1) ... [2020-08-21 23:45:18,339 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ef00bf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:18, skipping insertion in model container [2020-08-21 23:45:18,339 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 11:45:18" (1/1) ... [2020-08-21 23:45:18,347 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 23:45:18,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 23:45:18,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:45:18,648 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 23:45:18,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 23:45:18,712 INFO L208 MainTranslator]: Completed translation [2020-08-21 23:45:18,714 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:18 WrapperNode [2020-08-21 23:45:18,714 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 23:45:18,715 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 23:45:18,715 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 23:45:18,715 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 23:45:18,815 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:18" (1/1) ... [2020-08-21 23:45:18,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:18" (1/1) ... [2020-08-21 23:45:18,839 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:18" (1/1) ... [2020-08-21 23:45:18,839 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:18" (1/1) ... [2020-08-21 23:45:18,850 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:18" (1/1) ... [2020-08-21 23:45:18,864 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:18" (1/1) ... [2020-08-21 23:45:18,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:18" (1/1) ... [2020-08-21 23:45:18,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 23:45:18,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 23:45:18,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 23:45:18,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 23:45:18,869 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 23:45:18,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 23:45:18,931 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 23:45:18,931 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 23:45:18,931 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 23:45:18,931 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 23:45:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-21 23:45:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 23:45:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 23:45:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 23:45:18,932 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 23:45:19,238 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 23:45:19,238 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 23:45:19,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:45:19 BoogieIcfgContainer [2020-08-21 23:45:19,242 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 23:45:19,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 23:45:19,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 23:45:19,247 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 23:45:19,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 11:45:18" (1/3) ... [2020-08-21 23:45:19,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58676cbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:45:19, skipping insertion in model container [2020-08-21 23:45:19,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 11:45:18" (2/3) ... [2020-08-21 23:45:19,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58676cbe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 11:45:19, skipping insertion in model container [2020-08-21 23:45:19,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 11:45:19" (3/3) ... [2020-08-21 23:45:19,251 INFO L109 eAbstractionObserver]: Analyzing ICFG diamond_2-1.c [2020-08-21 23:45:19,261 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 23:45:19,269 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 23:45:19,283 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 23:45:19,308 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 23:45:19,308 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 23:45:19,308 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 23:45:19,309 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 23:45:19,309 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 23:45:19,309 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 23:45:19,309 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 23:45:19,309 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 23:45:19,328 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-21 23:45:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 23:45:19,337 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:19,338 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:19,339 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:19,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:19,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1906239810, now seen corresponding path program 1 times [2020-08-21 23:45:19,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:19,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542841552] [2020-08-21 23:45:19,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:19,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:19,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:45:19,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542841552] [2020-08-21 23:45:19,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:45:19,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-21 23:45:19,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238393826] [2020-08-21 23:45:19,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-21 23:45:19,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:19,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-21 23:45:19,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-21 23:45:19,477 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-08-21 23:45:19,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:19,501 INFO L93 Difference]: Finished difference Result 38 states and 51 transitions. [2020-08-21 23:45:19,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-21 23:45:19,502 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-21 23:45:19,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:19,511 INFO L225 Difference]: With dead ends: 38 [2020-08-21 23:45:19,511 INFO L226 Difference]: Without dead ends: 21 [2020-08-21 23:45:19,515 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 [2020-08-21 23:45:19,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-21 23:45:19,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-21 23:45:19,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-21 23:45:19,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 31 transitions. [2020-08-21 23:45:19,556 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 31 transitions. Word has length 10 [2020-08-21 23:45:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:19,556 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 31 transitions. [2020-08-21 23:45:19,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-21 23:45:19,557 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 31 transitions. [2020-08-21 23:45:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-21 23:45:19,557 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:19,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:19,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 23:45:19,559 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:19,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1847134466, now seen corresponding path program 1 times [2020-08-21 23:45:19,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:19,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001798254] [2020-08-21 23:45:19,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:19,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:19,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:45:19,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001798254] [2020-08-21 23:45:19,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:45:19,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:45:19,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89237185] [2020-08-21 23:45:19,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:45:19,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:19,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:45:19,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:45:19,691 INFO L87 Difference]: Start difference. First operand 21 states and 31 transitions. Second operand 3 states. [2020-08-21 23:45:19,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:19,777 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2020-08-21 23:45:19,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:45:19,778 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-08-21 23:45:19,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:19,782 INFO L225 Difference]: With dead ends: 28 [2020-08-21 23:45:19,783 INFO L226 Difference]: Without dead ends: 23 [2020-08-21 23:45:19,784 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 [2020-08-21 23:45:19,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-21 23:45:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-08-21 23:45:19,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 23:45:19,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2020-08-21 23:45:19,794 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 10 [2020-08-21 23:45:19,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:19,794 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2020-08-21 23:45:19,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:45:19,795 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2020-08-21 23:45:19,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 23:45:19,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:19,796 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:19,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 23:45:19,797 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:19,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:19,798 INFO L82 PathProgramCache]: Analyzing trace with hash -129940435, now seen corresponding path program 1 times [2020-08-21 23:45:19,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:19,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079810801] [2020-08-21 23:45:19,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:19,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:20,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:45:20,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079810801] [2020-08-21 23:45:20,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:20,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 23:45:20,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116016866] [2020-08-21 23:45:20,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 23:45:20,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:20,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 23:45:20,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:45:20,132 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand 10 states. [2020-08-21 23:45:21,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:21,193 INFO L93 Difference]: Finished difference Result 100 states and 182 transitions. [2020-08-21 23:45:21,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 23:45:21,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-08-21 23:45:21,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:21,196 INFO L225 Difference]: With dead ends: 100 [2020-08-21 23:45:21,196 INFO L226 Difference]: Without dead ends: 95 [2020-08-21 23:45:21,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-08-21 23:45:21,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-08-21 23:45:21,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 78. [2020-08-21 23:45:21,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-08-21 23:45:21,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 138 transitions. [2020-08-21 23:45:21,213 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 138 transitions. Word has length 21 [2020-08-21 23:45:21,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:21,213 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 138 transitions. [2020-08-21 23:45:21,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 23:45:21,215 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 138 transitions. [2020-08-21 23:45:21,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 23:45:21,218 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:21,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:21,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 23:45:21,219 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:21,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:21,219 INFO L82 PathProgramCache]: Analyzing trace with hash 550117935, now seen corresponding path program 1 times [2020-08-21 23:45:21,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:21,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053839019] [2020-08-21 23:45:21,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:21,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:45:21,426 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053839019] [2020-08-21 23:45:21,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:45:21,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:45:21,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868286492] [2020-08-21 23:45:21,427 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:45:21,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:21,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:45:21,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:45:21,429 INFO L87 Difference]: Start difference. First operand 78 states and 138 transitions. Second operand 3 states. [2020-08-21 23:45:21,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:21,527 INFO L93 Difference]: Finished difference Result 110 states and 195 transitions. [2020-08-21 23:45:21,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:45:21,528 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 23:45:21,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:21,531 INFO L225 Difference]: With dead ends: 110 [2020-08-21 23:45:21,531 INFO L226 Difference]: Without dead ends: 40 [2020-08-21 23:45:21,533 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 [2020-08-21 23:45:21,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-21 23:45:21,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-08-21 23:45:21,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-21 23:45:21,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2020-08-21 23:45:21,541 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 21 [2020-08-21 23:45:21,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:21,541 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2020-08-21 23:45:21,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:45:21,542 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2020-08-21 23:45:21,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 23:45:21,543 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:21,543 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:21,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 23:45:21,543 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:21,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:21,544 INFO L82 PathProgramCache]: Analyzing trace with hash 263086575, now seen corresponding path program 1 times [2020-08-21 23:45:21,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:21,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [911381588] [2020-08-21 23:45:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:21,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:21,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:21,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:21,791 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:45:21,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [911381588] [2020-08-21 23:45:21,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 23:45:21,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 23:45:21,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768877663] [2020-08-21 23:45:21,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 23:45:21,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:21,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 23:45:21,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-21 23:45:21,794 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand 13 states. [2020-08-21 23:45:21,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:21,971 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2020-08-21 23:45:21,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 23:45:21,972 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 21 [2020-08-21 23:45:21,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:21,973 INFO L225 Difference]: With dead ends: 51 [2020-08-21 23:45:21,973 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 23:45:21,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-08-21 23:45:21,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 23:45:21,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-08-21 23:45:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-21 23:45:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 56 transitions. [2020-08-21 23:45:21,990 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 56 transitions. Word has length 21 [2020-08-21 23:45:21,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:21,997 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 56 transitions. [2020-08-21 23:45:21,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 23:45:21,998 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 56 transitions. [2020-08-21 23:45:21,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 23:45:21,999 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:21,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:21,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 23:45:22,000 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:22,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:22,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1016777103, now seen corresponding path program 1 times [2020-08-21 23:45:22,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:22,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278151054] [2020-08-21 23:45:22,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:22,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:22,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 23:45:22,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 23:45:22,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 23:45:22,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278151054] [2020-08-21 23:45:22,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 23:45:22,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 23:45:22,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252095595] [2020-08-21 23:45:22,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 23:45:22,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 23:45:22,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 23:45:22,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 23:45:22,097 INFO L87 Difference]: Start difference. First operand 44 states and 56 transitions. Second operand 3 states. [2020-08-21 23:45:22,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 23:45:22,169 INFO L93 Difference]: Finished difference Result 61 states and 73 transitions. [2020-08-21 23:45:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 23:45:22,170 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 23:45:22,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 23:45:22,171 INFO L225 Difference]: With dead ends: 61 [2020-08-21 23:45:22,171 INFO L226 Difference]: Without dead ends: 45 [2020-08-21 23:45:22,172 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 [2020-08-21 23:45:22,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-08-21 23:45:22,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-08-21 23:45:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-08-21 23:45:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2020-08-21 23:45:22,178 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 21 [2020-08-21 23:45:22,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 23:45:22,179 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2020-08-21 23:45:22,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 23:45:22,179 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2020-08-21 23:45:22,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 23:45:22,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 23:45:22,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 23:45:22,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 23:45:22,180 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 23:45:22,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 23:45:22,181 INFO L82 PathProgramCache]: Analyzing trace with hash -345519953, now seen corresponding path program 1 times [2020-08-21 23:45:22,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 23:45:22,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263931955] [2020-08-21 23:45:22,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 23:45:22,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 23:45:22,207 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 23:45:22,207 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 23:45:22,214 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 23:45:22,235 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 11:45:22 BoogieIcfgContainer [2020-08-21 23:45:22,236 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 23:45:22,239 INFO L168 Benchmark]: Toolchain (without parser) took 3908.47 ms. Allocated memory was 139.5 MB in the beginning and 245.4 MB in the end (delta: 105.9 MB). Free memory was 102.7 MB in the beginning and 176.8 MB in the end (delta: -74.1 MB). Peak memory consumption was 31.8 MB. Max. memory is 7.1 GB. [2020-08-21 23:45:22,241 INFO L168 Benchmark]: CDTParser took 0.66 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 23:45:22,246 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.28 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 91.9 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-08-21 23:45:22,248 INFO L168 Benchmark]: Boogie Preprocessor took 152.73 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.9 MB in the beginning and 179.8 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-08-21 23:45:22,248 INFO L168 Benchmark]: RCFGBuilder took 374.93 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 163.2 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-08-21 23:45:22,250 INFO L168 Benchmark]: TraceAbstraction took 2991.87 ms. Allocated memory was 201.9 MB in the beginning and 245.4 MB in the end (delta: 43.5 MB). Free memory was 163.2 MB in the beginning and 176.8 MB in the end (delta: -13.6 MB). Peak memory consumption was 29.9 MB. Max. memory is 7.1 GB. [2020-08-21 23:45:22,263 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.66 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 384.28 ms. Allocated memory is still 139.5 MB. Free memory was 102.5 MB in the beginning and 91.9 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 152.73 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 91.9 MB in the beginning and 179.8 MB in the end (delta: -87.9 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 374.93 ms. Allocated memory is still 201.9 MB. Free memory was 179.8 MB in the beginning and 163.2 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2991.87 ms. Allocated memory was 201.9 MB in the beginning and 245.4 MB in the end (delta: 43.5 MB). Free memory was 163.2 MB in the beginning and 176.8 MB in the end (delta: -13.6 MB). Peak memory consumption was 29.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int x = 0; [L13] unsigned int y = __VERIFIER_nondet_uint(); [L15] COND TRUE x < 99 [L16] COND FALSE !(y % 2 == 0) [L17] x += 2 [L19] COND FALSE !(y % 2 == 0) [L20] x -= 2 [L22] COND FALSE !(y % 2 == 0) [L23] x += 2 [L25] COND FALSE !(y % 2 == 0) [L26] x -= 2 [L28] COND FALSE !(y % 2 == 0) [L29] x += 2 [L31] COND FALSE !(y % 2 == 0) [L32] x -= 4 [L34] COND FALSE !(y % 2 == 0) [L35] x += 4 [L37] COND FALSE !(y % 2 == 0) [L38] x += 2 [L40] COND FALSE !(y % 2 == 0) [L41] x -= 4 [L43] COND FALSE !(y % 2 == 0) [L44] x -= 4 [L15] COND FALSE !(x < 99) [L47] CALL __VERIFIER_assert((x % 2) == (y % 2)) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.9s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 139 SDtfs, 31 SDslu, 60 SDs, 0 SdLazy, 1106 SolverSat, 209 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=3, 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, 6 MinimizatonAttempts, 28 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 7076 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 4 PerfectInterpolantSequences, 2/4 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 incorrect! Received shutdown request...