/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:38:24,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:38:24,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:38:24,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:38:24,081 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:38:24,090 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:38:24,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:38:24,095 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:38:24,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:38:24,102 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:38:24,103 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:38:24,104 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:38:24,104 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:38:24,105 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:38:24,106 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:38:24,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:38:24,108 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:38:24,108 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:38:24,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:38:24,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:38:24,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:38:24,114 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:38:24,115 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:38:24,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:38:24,118 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 23:38:24,118 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 23:38:24,118 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 23:38:24,119 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 23:38:24,120 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 23:38:24,120 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 23:38:24,125 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:38:24,126 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:38:24,127 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:38:24,127 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 [2020-08-18 23:38:24,151 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:38:24,151 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:38:24,153 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:38:24,153 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:38:24,153 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:38:24,153 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:38:24,154 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:38:24,154 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:38:24,154 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:38:24,154 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:38:24,154 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:38:24,155 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:38:24,155 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:38:24,155 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:38:24,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:38:24,155 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:38:24,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:38:24,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:38:24,156 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:38:24,156 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:38:24,156 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:38:24,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:38:24,157 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:38:24,157 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:38:24,157 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:38:24,157 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:38:24,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:38:24,158 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:38:24,158 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:38:24,158 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=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:38:24,448 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:38:24,471 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:38:24,476 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:38:24,480 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:38:24,481 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:38:24,481 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-08-18 23:38:24,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3839d72f/31bd90b174bc4327b2473e1045784a11/FLAG947b9d6ca [2020-08-18 23:38:25,017 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:38:25,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs2f.c [2020-08-18 23:38:25,025 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3839d72f/31bd90b174bc4327b2473e1045784a11/FLAG947b9d6ca [2020-08-18 23:38:25,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c3839d72f/31bd90b174bc4327b2473e1045784a11 [2020-08-18 23:38:25,412 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:38:25,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:38:25,415 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:38:25,415 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:38:25,419 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:38:25,421 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:38:25" (1/1) ... [2020-08-18 23:38:25,424 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a8c36e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:25, skipping insertion in model container [2020-08-18 23:38:25,424 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:38:25" (1/1) ... [2020-08-18 23:38:25,432 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:38:25,452 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:38:25,665 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:38:25,673 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:38:25,692 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:38:25,708 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:38:25,708 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:25 WrapperNode [2020-08-18 23:38:25,709 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:38:25,709 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:38:25,710 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:38:25,710 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:38:25,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:25" (1/1) ... [2020-08-18 23:38:25,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:25" (1/1) ... [2020-08-18 23:38:25,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:25" (1/1) ... [2020-08-18 23:38:25,807 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:25" (1/1) ... [2020-08-18 23:38:25,815 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:25" (1/1) ... [2020-08-18 23:38:25,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:25" (1/1) ... [2020-08-18 23:38:25,822 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:25" (1/1) ... [2020-08-18 23:38:25,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:38:25,825 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:38:25,825 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:38:25,825 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:38:25,826 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:25" (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 [2020-08-18 23:38:25,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:38:25,888 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:38:25,888 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 23:38:25,888 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 23:38:25,888 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:38:25,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:38:25,889 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 23:38:25,889 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 23:38:25,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 23:38:25,889 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 23:38:25,889 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 23:38:25,889 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:38:25,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 23:38:25,890 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 23:38:25,890 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 23:38:25,890 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 23:38:25,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 23:38:25,890 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:38:25,891 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:38:26,226 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:38:26,227 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 23:38:26,230 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:38:26 BoogieIcfgContainer [2020-08-18 23:38:26,230 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:38:26,232 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:38:26,232 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:38:26,235 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:38:26,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:38:25" (1/3) ... [2020-08-18 23:38:26,236 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1a6bf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:38:26, skipping insertion in model container [2020-08-18 23:38:26,236 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:25" (2/3) ... [2020-08-18 23:38:26,237 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e1a6bf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:38:26, skipping insertion in model container [2020-08-18 23:38:26,237 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:38:26" (3/3) ... [2020-08-18 23:38:26,239 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-08-18 23:38:26,249 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:38:26,256 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:38:26,271 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:38:26,293 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:38:26,294 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:38:26,294 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:38:26,294 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:38:26,294 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:38:26,294 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:38:26,294 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:38:26,295 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:38:26,311 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-18 23:38:26,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 23:38:26,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:26,319 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] [2020-08-18 23:38:26,319 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:26,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:26,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-18 23:38:26,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:26,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292194762] [2020-08-18 23:38:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:26,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:26,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:26,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 23:38:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:26,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292194762] [2020-08-18 23:38:26,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:38:26,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:38:26,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481513791] [2020-08-18 23:38:26,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:38:26,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:26,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:38:26,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:38:26,573 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-18 23:38:26,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:26,731 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-18 23:38:26,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:38:26,734 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 23:38:26,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:26,752 INFO L225 Difference]: With dead ends: 56 [2020-08-18 23:38:26,752 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 23:38:26,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:38:26,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 23:38:26,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-18 23:38:26,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 23:38:26,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-18 23:38:26,802 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-08-18 23:38:26,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:26,803 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-18 23:38:26,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:38:26,803 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-18 23:38:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 23:38:26,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:26,805 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] [2020-08-18 23:38:26,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:38:26,806 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:26,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:26,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-18 23:38:26,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:26,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575648288] [2020-08-18 23:38:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:26,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:26,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 23:38:26,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:26,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:26,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575648288] [2020-08-18 23:38:26,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:38:26,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 23:38:26,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008169185] [2020-08-18 23:38:26,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:38:26,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:26,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:38:26,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:38:26,972 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-08-18 23:38:27,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:27,109 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-18 23:38:27,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 23:38:27,110 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-18 23:38:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:27,111 INFO L225 Difference]: With dead ends: 45 [2020-08-18 23:38:27,112 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 23:38:27,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:38:27,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 23:38:27,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 23:38:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 23:38:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-18 23:38:27,122 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-08-18 23:38:27,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:27,122 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-18 23:38:27,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:38:27,123 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-18 23:38:27,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 23:38:27,124 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:27,124 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, 1, 1, 1, 1, 1, 1] [2020-08-18 23:38:27,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:38:27,124 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:27,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:27,125 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-18 23:38:27,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:27,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001712781] [2020-08-18 23:38:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:27,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:27,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:27,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 23:38:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:27,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 23:38:27,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001712781] [2020-08-18 23:38:27,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:38:27,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 23:38:27,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966807724] [2020-08-18 23:38:27,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 23:38:27,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:27,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 23:38:27,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-18 23:38:27,286 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-08-18 23:38:27,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:27,504 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-18 23:38:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 23:38:27,505 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-18 23:38:27,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:27,506 INFO L225 Difference]: With dead ends: 39 [2020-08-18 23:38:27,506 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 23:38:27,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-08-18 23:38:27,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 23:38:27,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-18 23:38:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 23:38:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-18 23:38:27,515 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-08-18 23:38:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:27,515 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-18 23:38:27,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 23:38:27,516 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-18 23:38:27,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 23:38:27,517 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:27,517 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:38:27,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:38:27,517 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:27,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:27,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-08-18 23:38:27,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:27,519 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039301273] [2020-08-18 23:38:27,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:27,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:27,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 23:38:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:27,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:27,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039301273] [2020-08-18 23:38:27,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:27,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 23:38:27,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473946799] [2020-08-18 23:38:27,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 23:38:27,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:27,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 23:38:27,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 23:38:27,630 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-08-18 23:38:27,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:27,814 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-18 23:38:27,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 23:38:27,815 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-08-18 23:38:27,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:27,816 INFO L225 Difference]: With dead ends: 54 [2020-08-18 23:38:27,816 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 23:38:27,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-18 23:38:27,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 23:38:27,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-18 23:38:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 23:38:27,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-18 23:38:27,825 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-08-18 23:38:27,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:27,825 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-18 23:38:27,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 23:38:27,826 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-18 23:38:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 23:38:27,827 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:27,827 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:38:27,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 23:38:27,828 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:27,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:27,828 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 2 times [2020-08-18 23:38:27,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:27,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738397203] [2020-08-18 23:38:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:27,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:27,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:27,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 23:38:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 23:38:27,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738397203] [2020-08-18 23:38:27,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:27,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 23:38:27,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813191222] [2020-08-18 23:38:27,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:38:27,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:27,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:38:27,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:38:27,942 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-08-18 23:38:28,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:28,042 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-08-18 23:38:28,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:38:28,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-18 23:38:28,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:28,044 INFO L225 Difference]: With dead ends: 55 [2020-08-18 23:38:28,044 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 23:38:28,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:38:28,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 23:38:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-08-18 23:38:28,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 23:38:28,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-18 23:38:28,052 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-08-18 23:38:28,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:28,053 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-18 23:38:28,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:38:28,053 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-18 23:38:28,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 23:38:28,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:28,054 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:38:28,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 23:38:28,055 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:28,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-08-18 23:38:28,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:28,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931290413] [2020-08-18 23:38:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:28,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:28,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 23:38:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:28,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:28,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931290413] [2020-08-18 23:38:28,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:28,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 23:38:28,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380734083] [2020-08-18 23:38:28,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 23:38:28,315 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:28,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 23:38:28,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-08-18 23:38:28,316 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 14 states. [2020-08-18 23:38:28,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:28,830 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-18 23:38:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 23:38:28,831 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-08-18 23:38:28,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:28,832 INFO L225 Difference]: With dead ends: 46 [2020-08-18 23:38:28,832 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 23:38:28,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-08-18 23:38:28,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 23:38:28,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-08-18 23:38:28,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 23:38:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-08-18 23:38:28,843 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2020-08-18 23:38:28,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:28,843 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-08-18 23:38:28,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 23:38:28,843 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-08-18 23:38:28,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-18 23:38:28,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:28,844 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:38:28,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 23:38:28,844 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:28,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:28,844 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-08-18 23:38:28,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:28,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363320562] [2020-08-18 23:38:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:28,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:28,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:28,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:28,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 23:38:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:28,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363320562] [2020-08-18 23:38:28,992 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:28,993 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 23:38:28,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896139529] [2020-08-18 23:38:28,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 23:38:28,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:28,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 23:38:28,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-18 23:38:28,995 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2020-08-18 23:38:29,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:29,167 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-08-18 23:38:29,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 23:38:29,167 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-08-18 23:38:29,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:29,168 INFO L225 Difference]: With dead ends: 66 [2020-08-18 23:38:29,168 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 23:38:29,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-18 23:38:29,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 23:38:29,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-08-18 23:38:29,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-18 23:38:29,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-18 23:38:29,181 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 36 [2020-08-18 23:38:29,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:29,186 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-18 23:38:29,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 23:38:29,186 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-18 23:38:29,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-18 23:38:29,187 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:29,187 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:38:29,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 23:38:29,188 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:29,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:29,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1680039082, now seen corresponding path program 3 times [2020-08-18 23:38:29,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:29,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685715116] [2020-08-18 23:38:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 23:38:29,243 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 23:38:29,243 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 23:38:29,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 23:38:29,265 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:38:29 BoogieIcfgContainer [2020-08-18 23:38:29,266 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:38:29,268 INFO L168 Benchmark]: Toolchain (without parser) took 3853.98 ms. Allocated memory was 140.0 MB in the beginning and 245.4 MB in the end (delta: 105.4 MB). Free memory was 102.7 MB in the beginning and 122.9 MB in the end (delta: -20.2 MB). Peak memory consumption was 85.1 MB. Max. memory is 7.1 GB. [2020-08-18 23:38:29,269 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 23:38:29,270 INFO L168 Benchmark]: CACSL2BoogieTranslator took 293.87 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 91.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-18 23:38:29,271 INFO L168 Benchmark]: Boogie Preprocessor took 114.88 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 91.9 MB in the beginning and 179.1 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-18 23:38:29,272 INFO L168 Benchmark]: RCFGBuilder took 406.00 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 161.9 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-08-18 23:38:29,273 INFO L168 Benchmark]: TraceAbstraction took 3034.04 ms. Allocated memory was 201.9 MB in the beginning and 245.4 MB in the end (delta: 43.5 MB). Free memory was 161.3 MB in the beginning and 122.9 MB in the end (delta: 38.3 MB). Peak memory consumption was 81.9 MB. Max. memory is 7.1 GB. [2020-08-18 23:38:29,277 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 293.87 ms. Allocated memory is still 140.0 MB. Free memory was 102.5 MB in the beginning and 91.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.88 ms. Allocated memory was 140.0 MB in the beginning and 201.9 MB in the end (delta: 61.9 MB). Free memory was 91.9 MB in the beginning and 179.1 MB in the end (delta: -87.2 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 406.00 ms. Allocated memory is still 201.9 MB. Free memory was 179.1 MB in the beginning and 161.9 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3034.04 ms. Allocated memory was 201.9 MB in the beginning and 245.4 MB in the end (delta: 43.5 MB). Free memory was 161.3 MB in the beginning and 122.9 MB in the end (delta: 38.3 MB). Peak memory consumption was 81.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i