/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 false -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-eb0fd7c [2020-09-21 10:28:03,358 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 10:28:03,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 10:28:03,409 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 10:28:03,409 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 10:28:03,421 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 10:28:03,422 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 10:28:03,427 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 10:28:03,430 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 10:28:03,434 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 10:28:03,435 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 10:28:03,436 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 10:28:03,436 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 10:28:03,439 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 10:28:03,442 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 10:28:03,445 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 10:28:03,446 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 10:28:03,448 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 10:28:03,451 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 10:28:03,460 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 10:28:03,462 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 10:28:03,464 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 10:28:03,465 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 10:28:03,466 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 10:28:03,469 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-21 10:28:03,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 10:28:03,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 10:28:03,483 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 10:28:03,484 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 10:28:03,532 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 10:28:03,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 10:28:03,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 10:28:03,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 10:28:03,535 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 10:28:03,536 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 10:28:03,536 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 10:28:03,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 10:28:03,537 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 10:28:03,537 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 10:28:03,538 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 10:28:03,538 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 10:28:03,538 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 10:28:03,539 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 10:28:03,539 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 10:28:03,539 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 10:28:03,539 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 10:28:03,540 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 10:28:03,540 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 10:28:03,540 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 10:28:03,540 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 10:28:03,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:28:03,541 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 10:28:03,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 10:28:03,541 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 10:28:03,541 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 10:28:03,541 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 10:28:03,542 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 10:28:03,542 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 10:28:03,542 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 -> false [2020-09-21 10:28:04,037 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 10:28:04,064 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 10:28:04,070 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 10:28:04,072 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 10:28:04,072 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 10:28:04,073 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-09-21 10:28:04,175 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70bbdf388/e859c6e931f74f96b4fb4d03e93845b8/FLAG23b9a3c79 [2020-09-21 10:28:04,751 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 10:28:04,752 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs2f.c [2020-09-21 10:28:04,761 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70bbdf388/e859c6e931f74f96b4fb4d03e93845b8/FLAG23b9a3c79 [2020-09-21 10:28:05,112 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/70bbdf388/e859c6e931f74f96b4fb4d03e93845b8 [2020-09-21 10:28:05,130 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 10:28:05,136 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 10:28:05,140 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 10:28:05,141 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 10:28:05,146 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 10:28:05,147 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:28:05" (1/1) ... [2020-09-21 10:28:05,153 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@548345a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:05, skipping insertion in model container [2020-09-21 10:28:05,153 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 10:28:05" (1/1) ... [2020-09-21 10:28:05,165 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 10:28:05,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 10:28:05,544 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:28:05,558 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 10:28:05,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 10:28:05,700 INFO L208 MainTranslator]: Completed translation [2020-09-21 10:28:05,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:05 WrapperNode [2020-09-21 10:28:05,702 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 10:28:05,703 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 10:28:05,703 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 10:28:05,704 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 10:28:05,722 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:05" (1/1) ... [2020-09-21 10:28:05,724 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:05" (1/1) ... [2020-09-21 10:28:05,739 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:05" (1/1) ... [2020-09-21 10:28:05,740 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:05" (1/1) ... [2020-09-21 10:28:05,758 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:05" (1/1) ... [2020-09-21 10:28:05,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:05" (1/1) ... [2020-09-21 10:28:05,766 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:05" (1/1) ... [2020-09-21 10:28:05,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 10:28:05,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 10:28:05,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 10:28:05,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 10:28:05,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 10:28:05,858 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 10:28:05,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 10:28:05,859 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 10:28:05,859 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 10:28:05,859 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 10:28:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 10:28:05,859 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 10:28:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 10:28:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 10:28:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 10:28:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-21 10:28:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 10:28:05,860 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 10:28:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-21 10:28:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 10:28:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 10:28:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 10:28:05,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 10:28:05,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 10:28:06,183 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 10:28:06,183 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 10:28:06,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:28:06 BoogieIcfgContainer [2020-09-21 10:28:06,189 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 10:28:06,190 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 10:28:06,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 10:28:06,194 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 10:28:06,195 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 10:28:05" (1/3) ... [2020-09-21 10:28:06,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4173c228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:28:06, skipping insertion in model container [2020-09-21 10:28:06,196 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 10:28:05" (2/3) ... [2020-09-21 10:28:06,196 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4173c228 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 10:28:06, skipping insertion in model container [2020-09-21 10:28:06,197 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 10:28:06" (3/3) ... [2020-09-21 10:28:06,199 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-09-21 10:28:06,212 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 10:28:06,222 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 10:28:06,246 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 10:28:06,290 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 10:28:06,291 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 10:28:06,291 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 10:28:06,291 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 10:28:06,291 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 10:28:06,291 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 10:28:06,292 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 10:28:06,292 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 10:28:06,324 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-09-21 10:28:06,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:28:06,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:06,333 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] [2020-09-21 10:28:06,333 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:06,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:06,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-09-21 10:28:06,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:06,354 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383435081] [2020-09-21 10:28:06,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:06,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:06,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:06,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:06,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:28:06,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:06,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383435081] [2020-09-21 10:28:06,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:06,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 10:28:06,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151848614] [2020-09-21 10:28:06,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 10:28:06,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:06,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 10:28:06,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 10:28:06,660 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-09-21 10:28:06,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:06,780 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-09-21 10:28:06,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 10:28:06,782 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-09-21 10:28:06,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:06,793 INFO L225 Difference]: With dead ends: 56 [2020-09-21 10:28:06,793 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 10:28:06,798 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 [2020-09-21 10:28:06,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 10:28:06,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-09-21 10:28:06,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-21 10:28:06,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-09-21 10:28:06,846 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-09-21 10:28:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:06,847 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-09-21 10:28:06,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 10:28:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-09-21 10:28:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-21 10:28:06,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:06,849 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] [2020-09-21 10:28:06,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 10:28:06,850 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:06,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:06,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-09-21 10:28:06,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:06,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184332208] [2020-09-21 10:28:06,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:06,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:06,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:06,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:28:06,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:06,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:06,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184332208] [2020-09-21 10:28:06,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:06,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-21 10:28:06,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604637952] [2020-09-21 10:28:06,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:28:06,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:06,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:28:06,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:28:06,989 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-09-21 10:28:07,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:07,164 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-09-21 10:28:07,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 10:28:07,165 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-09-21 10:28:07,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:07,166 INFO L225 Difference]: With dead ends: 45 [2020-09-21 10:28:07,166 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 10:28:07,168 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 [2020-09-21 10:28:07,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 10:28:07,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-09-21 10:28:07,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-21 10:28:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-09-21 10:28:07,177 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-09-21 10:28:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:07,177 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-09-21 10:28:07,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:28:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-09-21 10:28:07,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-21 10:28:07,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:07,179 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] [2020-09-21 10:28:07,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 10:28:07,179 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:07,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:07,180 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-09-21 10:28:07,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:07,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350722717] [2020-09-21 10:28:07,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:07,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:28:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,347 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-21 10:28:07,348 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350722717] [2020-09-21 10:28:07,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 10:28:07,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-21 10:28:07,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158818797] [2020-09-21 10:28:07,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:28:07,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:07,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:28:07,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:28:07,351 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-09-21 10:28:07,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:07,593 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-09-21 10:28:07,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 10:28:07,593 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-09-21 10:28:07,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:07,595 INFO L225 Difference]: With dead ends: 39 [2020-09-21 10:28:07,595 INFO L226 Difference]: Without dead ends: 33 [2020-09-21 10:28:07,596 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 [2020-09-21 10:28:07,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-21 10:28:07,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-21 10:28:07,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-21 10:28:07,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-09-21 10:28:07,609 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-09-21 10:28:07,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:07,610 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-09-21 10:28:07,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:28:07,610 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-09-21 10:28:07,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 10:28:07,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:07,611 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] [2020-09-21 10:28:07,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 10:28:07,612 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:07,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:07,612 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-09-21 10:28:07,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:07,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643235738] [2020-09-21 10:28:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:07,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:28:07,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:07,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643235738] [2020-09-21 10:28:07,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:07,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 10:28:07,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713818610] [2020-09-21 10:28:07,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 10:28:07,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:07,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 10:28:07,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-21 10:28:07,728 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-09-21 10:28:07,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:07,905 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-09-21 10:28:07,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 10:28:07,906 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-09-21 10:28:07,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:07,907 INFO L225 Difference]: With dead ends: 54 [2020-09-21 10:28:07,907 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 10:28:07,908 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 [2020-09-21 10:28:07,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 10:28:07,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-09-21 10:28:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-21 10:28:07,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-09-21 10:28:07,916 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-09-21 10:28:07,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:07,916 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-09-21 10:28:07,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 10:28:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-09-21 10:28:07,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 10:28:07,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:07,918 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] [2020-09-21 10:28:07,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 10:28:07,918 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:07,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 2 times [2020-09-21 10:28:07,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:07,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143073264] [2020-09-21 10:28:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:07,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:08,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:08,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:28:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:08,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-09-21 10:28:08,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143073264] [2020-09-21 10:28:08,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:08,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 10:28:08,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21257860] [2020-09-21 10:28:08,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 10:28:08,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:08,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 10:28:08,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-21 10:28:08,101 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-09-21 10:28:08,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:08,231 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-09-21 10:28:08,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 10:28:08,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-09-21 10:28:08,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:08,232 INFO L225 Difference]: With dead ends: 55 [2020-09-21 10:28:08,232 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 10:28:08,235 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 [2020-09-21 10:28:08,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 10:28:08,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-09-21 10:28:08,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-21 10:28:08,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-09-21 10:28:08,249 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-09-21 10:28:08,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:08,250 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-09-21 10:28:08,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 10:28:08,251 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-09-21 10:28:08,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-21 10:28:08,253 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:08,253 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] [2020-09-21 10:28:08,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 10:28:08,253 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:08,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:08,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-09-21 10:28:08,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:08,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378576992] [2020-09-21 10:28:08,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:08,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:08,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:08,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:08,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:28:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:08,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378576992] [2020-09-21 10:28:08,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:08,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 10:28:08,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733630829] [2020-09-21 10:28:08,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 10:28:08,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:08,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 10:28:08,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-09-21 10:28:08,682 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 14 states. [2020-09-21 10:28:09,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:09,275 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-09-21 10:28:09,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 10:28:09,275 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-09-21 10:28:09,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:09,277 INFO L225 Difference]: With dead ends: 46 [2020-09-21 10:28:09,277 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 10:28:09,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-09-21 10:28:09,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 10:28:09,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-09-21 10:28:09,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-21 10:28:09,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-09-21 10:28:09,286 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2020-09-21 10:28:09,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:09,286 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-09-21 10:28:09,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 10:28:09,286 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-09-21 10:28:09,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 10:28:09,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:09,287 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] [2020-09-21 10:28:09,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 10:28:09,288 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:09,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:09,288 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-09-21 10:28:09,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:09,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922478332] [2020-09-21 10:28:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:09,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 10:28:09,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:09,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-09-21 10:28:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 10:28:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 10:28:09,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922478332] [2020-09-21 10:28:09,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 10:28:09,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 10:28:09,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071623710] [2020-09-21 10:28:09,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 10:28:09,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 10:28:09,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 10:28:09,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-21 10:28:09,401 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2020-09-21 10:28:09,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 10:28:09,591 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-09-21 10:28:09,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 10:28:09,592 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-09-21 10:28:09,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 10:28:09,593 INFO L225 Difference]: With dead ends: 66 [2020-09-21 10:28:09,593 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 10:28:09,594 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 [2020-09-21 10:28:09,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 10:28:09,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-09-21 10:28:09,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 10:28:09,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-09-21 10:28:09,601 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 36 [2020-09-21 10:28:09,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 10:28:09,602 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-09-21 10:28:09,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 10:28:09,602 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-09-21 10:28:09,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-21 10:28:09,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 10:28:09,603 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] [2020-09-21 10:28:09,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 10:28:09,603 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 10:28:09,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 10:28:09,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1680039082, now seen corresponding path program 3 times [2020-09-21 10:28:09,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 10:28:09,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521085802] [2020-09-21 10:28:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 10:28:09,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 10:28:09,639 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 10:28:09,639 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 10:28:09,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 10:28:09,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 10:28:09 BoogieIcfgContainer [2020-09-21 10:28:09,666 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 10:28:09,669 INFO L168 Benchmark]: Toolchain (without parser) took 4536.85 ms. Allocated memory was 139.5 MB in the beginning and 245.9 MB in the end (delta: 106.4 MB). Free memory was 102.7 MB in the beginning and 127.5 MB in the end (delta: -24.8 MB). Peak memory consumption was 81.6 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:09,670 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-21 10:28:09,671 INFO L168 Benchmark]: CACSL2BoogieTranslator took 562.54 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 102.0 MB in the beginning and 180.9 MB in the end (delta: -78.9 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:09,672 INFO L168 Benchmark]: Boogie Preprocessor took 66.14 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 178.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:09,673 INFO L168 Benchmark]: RCFGBuilder took 419.10 ms. Allocated memory is still 201.9 MB. Free memory was 178.5 MB in the beginning and 161.4 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:09,674 INFO L168 Benchmark]: TraceAbstraction took 3475.68 ms. Allocated memory was 201.9 MB in the beginning and 245.9 MB in the end (delta: 44.0 MB). Free memory was 160.8 MB in the beginning and 127.5 MB in the end (delta: 33.3 MB). Peak memory consumption was 77.3 MB. Max. memory is 7.1 GB. [2020-09-21 10:28:09,678 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 139.5 MB. Free memory was 121.0 MB in the beginning and 120.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 562.54 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 102.0 MB in the beginning and 180.9 MB in the end (delta: -78.9 MB). Peak memory consumption was 21.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 66.14 ms. Allocated memory is still 201.9 MB. Free memory was 180.9 MB in the beginning and 178.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 419.10 ms. Allocated memory is still 201.9 MB. Free memory was 178.5 MB in the beginning and 161.4 MB in the end (delta: 17.1 MB). Peak memory consumption was 17.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3475.68 ms. Allocated memory was 201.9 MB in the beginning and 245.9 MB in the end (delta: 44.0 MB). Free memory was 160.8 MB in the beginning and 127.5 MB in the end (delta: 33.3 MB). Peak memory consumption was 77.3 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