/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=SMALLESTAMONGWIDE --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/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 04:29:49,079 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 04:29:49,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 04:29:49,128 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 04:29:49,129 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 04:29:49,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 04:29:49,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 04:29:49,147 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 04:29:49,150 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 04:29:49,151 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 04:29:49,153 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 04:29:49,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 04:29:49,155 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 04:29:49,159 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 04:29:49,161 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 04:29:49,162 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 04:29:49,164 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 04:29:49,165 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 04:29:49,167 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 04:29:49,174 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 04:29:49,176 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 04:29:49,176 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 04:29:49,178 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 04:29:49,179 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 04:29:49,183 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 04:29:49,183 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 04:29:49,184 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 04:29:49,186 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 04:29:49,186 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 04:29:49,187 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 04:29:49,192 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 04:29:49,193 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 04:29:49,194 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 04:29:49,195 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 [2020-08-19 04:29:49,228 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 04:29:49,228 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 04:29:49,229 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 04:29:49,229 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 04:29:49,230 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 04:29:49,230 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 04:29:49,230 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 04:29:49,230 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 04:29:49,231 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 04:29:49,231 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 04:29:49,231 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 04:29:49,231 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 04:29:49,231 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 04:29:49,232 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 04:29:49,232 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 04:29:49,232 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 04:29:49,232 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 04:29:49,232 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 04:29:49,233 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 04:29:49,233 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 04:29:49,233 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 04:29:49,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:29:49,233 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 04:29:49,234 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 04:29:49,234 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 04:29:49,234 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 04:29:49,234 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 04:29:49,234 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 04:29:49,235 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 04:29:49,235 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=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2; [2020-08-19 04:29:49,547 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 04:29:49,569 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 04:29:49,573 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 04:29:49,575 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 04:29:49,576 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 04:29:49,577 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-08-19 04:29:49,656 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67f5df474/6a23291c73a540d8a41640723c0972b9/FLAG8cd2fdae3 [2020-08-19 04:29:50,124 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 04:29:50,124 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs3f.c [2020-08-19 04:29:50,130 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67f5df474/6a23291c73a540d8a41640723c0972b9/FLAG8cd2fdae3 [2020-08-19 04:29:50,486 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/67f5df474/6a23291c73a540d8a41640723c0972b9 [2020-08-19 04:29:50,494 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 04:29:50,495 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 04:29:50,496 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 04:29:50,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 04:29:50,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 04:29:50,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,504 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3add5f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50, skipping insertion in model container [2020-08-19 04:29:50,504 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,511 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 04:29:50,527 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 04:29:50,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:29:50,759 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 04:29:50,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 04:29:50,800 INFO L208 MainTranslator]: Completed translation [2020-08-19 04:29:50,800 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50 WrapperNode [2020-08-19 04:29:50,800 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 04:29:50,801 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 04:29:50,801 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 04:29:50,801 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 04:29:50,897 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,906 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,907 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,923 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,929 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (1/1) ... [2020-08-19 04:29:50,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 04:29:50,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 04:29:50,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 04:29:50,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 04:29:50,933 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 04:29:50,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 04:29:50,991 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 04:29:50,991 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 04:29:50,992 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 04:29:50,992 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 04:29:50,992 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 04:29:50,992 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 04:29:50,992 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 04:29:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 04:29:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 04:29:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-19 04:29:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 04:29:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 04:29:50,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-19 04:29:50,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 04:29:50,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 04:29:50,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 04:29:50,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 04:29:50,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 04:29:51,337 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 04:29:51,337 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-19 04:29:51,341 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:29:51 BoogieIcfgContainer [2020-08-19 04:29:51,341 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 04:29:51,343 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 04:29:51,343 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 04:29:51,346 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 04:29:51,347 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 04:29:50" (1/3) ... [2020-08-19 04:29:51,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1dad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:29:51, skipping insertion in model container [2020-08-19 04:29:51,348 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 04:29:50" (2/3) ... [2020-08-19 04:29:51,348 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f1dad7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 04:29:51, skipping insertion in model container [2020-08-19 04:29:51,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 04:29:51" (3/3) ... [2020-08-19 04:29:51,350 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-08-19 04:29:51,365 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 04:29:51,372 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 04:29:51,386 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 04:29:51,408 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 04:29:51,408 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 04:29:51,408 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 04:29:51,408 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 04:29:51,409 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 04:29:51,409 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 04:29:51,409 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 04:29:51,409 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 04:29:51,429 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-19 04:29:51,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 04:29:51,436 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:51,437 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] [2020-08-19 04:29:51,438 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:51,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:51,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-19 04:29:51,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:51,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474152256] [2020-08-19 04:29:51,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 04:29:51,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:29:51,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474152256] [2020-08-19 04:29:51,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:29:51,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 04:29:51,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345888000] [2020-08-19 04:29:51,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 04:29:51,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:51,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 04:29:51,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 04:29:51,675 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-19 04:29:51,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:51,779 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-19 04:29:51,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 04:29:51,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-19 04:29:51,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:51,790 INFO L225 Difference]: With dead ends: 56 [2020-08-19 04:29:51,790 INFO L226 Difference]: Without dead ends: 26 [2020-08-19 04:29:51,794 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 [2020-08-19 04:29:51,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-19 04:29:51,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-19 04:29:51,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-19 04:29:51,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-19 04:29:51,837 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-08-19 04:29:51,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:51,837 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-19 04:29:51,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 04:29:51,838 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-19 04:29:51,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-19 04:29:51,839 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:51,839 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] [2020-08-19 04:29:51,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 04:29:51,840 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:51,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:51,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-19 04:29:51,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:51,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345036013] [2020-08-19 04:29:51,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:51,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:51,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:51,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 04:29:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:29:52,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345036013] [2020-08-19 04:29:52,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:29:52,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 04:29:52,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863154461] [2020-08-19 04:29:52,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:29:52,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:52,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:29:52,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:29:52,016 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-08-19 04:29:52,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:52,138 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-19 04:29:52,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 04:29:52,139 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-19 04:29:52,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:52,140 INFO L225 Difference]: With dead ends: 45 [2020-08-19 04:29:52,140 INFO L226 Difference]: Without dead ends: 32 [2020-08-19 04:29:52,142 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 [2020-08-19 04:29:52,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-19 04:29:52,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-19 04:29:52,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-19 04:29:52,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-19 04:29:52,150 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-08-19 04:29:52,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:52,151 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-19 04:29:52,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:29:52,151 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-19 04:29:52,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-19 04:29:52,152 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:52,153 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] [2020-08-19 04:29:52,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 04:29:52,153 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:52,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:52,154 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-19 04:29:52,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:52,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648529908] [2020-08-19 04:29:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:52,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:52,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 04:29:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-19 04:29:52,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648529908] [2020-08-19 04:29:52,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 04:29:52,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 04:29:52,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152096158] [2020-08-19 04:29:52,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:29:52,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:52,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:29:52,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:29:52,378 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-08-19 04:29:52,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:52,608 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-19 04:29:52,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 04:29:52,609 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-19 04:29:52,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:52,610 INFO L225 Difference]: With dead ends: 39 [2020-08-19 04:29:52,610 INFO L226 Difference]: Without dead ends: 33 [2020-08-19 04:29:52,611 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 [2020-08-19 04:29:52,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-19 04:29:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-19 04:29:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-19 04:29:52,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-19 04:29:52,619 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-08-19 04:29:52,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:52,620 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-19 04:29:52,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:29:52,620 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-19 04:29:52,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-19 04:29:52,621 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:52,622 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] [2020-08-19 04:29:52,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 04:29:52,622 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:52,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:52,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-08-19 04:29:52,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:52,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370124049] [2020-08-19 04:29:52,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 04:29:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:52,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 04:29:52,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370124049] [2020-08-19 04:29:52,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:52,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 04:29:52,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299979487] [2020-08-19 04:29:52,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 04:29:52,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:52,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 04:29:52,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 04:29:52,742 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-08-19 04:29:52,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:52,934 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-19 04:29:52,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 04:29:52,935 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-08-19 04:29:52,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:52,936 INFO L225 Difference]: With dead ends: 54 [2020-08-19 04:29:52,936 INFO L226 Difference]: Without dead ends: 38 [2020-08-19 04:29:52,937 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 [2020-08-19 04:29:52,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-19 04:29:52,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-19 04:29:52,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-19 04:29:52,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-19 04:29:52,944 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-08-19 04:29:52,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:52,945 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-19 04:29:52,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 04:29:52,945 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-19 04:29:52,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-19 04:29:52,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:52,946 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] [2020-08-19 04:29:52,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 04:29:52,947 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:52,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:52,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 2 times [2020-08-19 04:29:52,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:52,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774638216] [2020-08-19 04:29:52,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:53,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 04:29:53,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:53,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-19 04:29:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 04:29:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-19 04:29:53,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774638216] [2020-08-19 04:29:53,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 04:29:53,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 04:29:53,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218621447] [2020-08-19 04:29:53,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 04:29:53,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 04:29:53,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 04:29:53,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 04:29:53,049 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-08-19 04:29:53,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 04:29:53,147 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-08-19 04:29:53,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 04:29:53,147 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-19 04:29:53,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 04:29:53,148 INFO L225 Difference]: With dead ends: 55 [2020-08-19 04:29:53,149 INFO L226 Difference]: Without dead ends: 38 [2020-08-19 04:29:53,149 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 [2020-08-19 04:29:53,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-19 04:29:53,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-08-19 04:29:53,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-19 04:29:53,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-19 04:29:53,156 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-08-19 04:29:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 04:29:53,157 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-19 04:29:53,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 04:29:53,157 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-19 04:29:53,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-19 04:29:53,158 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 04:29:53,158 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] [2020-08-19 04:29:53,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 04:29:53,159 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 04:29:53,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 04:29:53,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-08-19 04:29:53,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 04:29:53,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1781947500] [2020-08-19 04:29:53,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 04:29:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-19 04:29:53,191 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-19 04:29:53,191 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-19 04:29:53,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 04:29:53,214 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 04:29:53 BoogieIcfgContainer [2020-08-19 04:29:53,214 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 04:29:53,217 INFO L168 Benchmark]: Toolchain (without parser) took 2720.95 ms. Allocated memory was 143.1 MB in the beginning and 234.4 MB in the end (delta: 91.2 MB). Free memory was 104.0 MB in the beginning and 124.5 MB in the end (delta: -20.5 MB). Peak memory consumption was 70.7 MB. Max. memory is 7.1 GB. [2020-08-19 04:29:53,218 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 143.1 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 04:29:53,219 INFO L168 Benchmark]: CACSL2BoogieTranslator took 304.73 ms. Allocated memory is still 143.1 MB. Free memory was 103.8 MB in the beginning and 92.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-19 04:29:53,220 INFO L168 Benchmark]: Boogie Preprocessor took 130.66 ms. Allocated memory was 143.1 MB in the beginning and 203.4 MB in the end (delta: 60.3 MB). Free memory was 92.8 MB in the beginning and 180.9 MB in the end (delta: -88.1 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-08-19 04:29:53,221 INFO L168 Benchmark]: RCFGBuilder took 409.43 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 164.0 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-08-19 04:29:53,221 INFO L168 Benchmark]: TraceAbstraction took 1871.34 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 163.3 MB in the beginning and 124.5 MB in the end (delta: 38.8 MB). Peak memory consumption was 69.8 MB. Max. memory is 7.1 GB. [2020-08-19 04:29:53,228 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 143.1 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 304.73 ms. Allocated memory is still 143.1 MB. Free memory was 103.8 MB in the beginning and 92.8 MB in the end (delta: 11.0 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.66 ms. Allocated memory was 143.1 MB in the beginning and 203.4 MB in the end (delta: 60.3 MB). Free memory was 92.8 MB in the beginning and 180.9 MB in the end (delta: -88.1 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 409.43 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 164.0 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1871.34 ms. Allocated memory was 203.4 MB in the beginning and 234.4 MB in the end (delta: 30.9 MB). Free memory was 163.3 MB in the beginning and 124.5 MB in the end (delta: 38.8 MB). Peak memory consumption was 69.8 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