/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 0.1.25-5644d1e-m [2020-08-18 15:35:04,962 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 15:35:04,966 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 15:35:05,011 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 15:35:05,012 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 15:35:05,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 15:35:05,025 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 15:35:05,029 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 15:35:05,031 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 15:35:05,032 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 15:35:05,034 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 15:35:05,036 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 15:35:05,036 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 15:35:05,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 15:35:05,044 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 15:35:05,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 15:35:05,048 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 15:35:05,050 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 15:35:05,053 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 15:35:05,060 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 15:35:05,062 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 15:35:05,063 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 15:35:05,064 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 15:35:05,064 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 15:35:05,069 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 15:35:05,074 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 15:35:05,074 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 15:35:05,075 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 15:35:05,076 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 15:35:05,077 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 15:35:05,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 15:35:05,078 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 15:35:05,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 15:35:05,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 15:35:05,079 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 15:35:05,080 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 15:35:05,081 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 15:35:05,125 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 15:35:05,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 15:35:05,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 15:35:05,127 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 15:35:05,128 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 15:35:05,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 15:35:05,128 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 15:35:05,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 15:35:05,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 15:35:05,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 15:35:05,130 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 15:35:05,130 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 15:35:05,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 15:35:05,131 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 15:35:05,131 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 15:35:05,131 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 15:35:05,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 15:35:05,132 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 15:35:05,132 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 15:35:05,132 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 15:35:05,132 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 15:35:05,133 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:35:05,133 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 15:35:05,133 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 15:35:05,133 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 15:35:05,133 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 15:35:05,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 15:35:05,134 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 15:35:05,134 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 15:35:05,134 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 [2020-08-18 15:35:05,442 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 15:35:05,458 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 15:35:05,462 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 15:35:05,463 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 15:35:05,463 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 15:35:05,464 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs2f.c [2020-08-18 15:35:05,537 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02ba67cba/0a482283538649a88f74b27ed3468662/FLAG93d960d05 [2020-08-18 15:35:06,020 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 15:35:06,020 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs2f.c [2020-08-18 15:35:06,027 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02ba67cba/0a482283538649a88f74b27ed3468662/FLAG93d960d05 [2020-08-18 15:35:06,371 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/02ba67cba/0a482283538649a88f74b27ed3468662 [2020-08-18 15:35:06,380 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 15:35:06,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 15:35:06,382 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 15:35:06,383 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 15:35:06,386 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 15:35:06,387 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:35:06" (1/1) ... [2020-08-18 15:35:06,390 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58c721ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:06, skipping insertion in model container [2020-08-18 15:35:06,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 03:35:06" (1/1) ... [2020-08-18 15:35:06,398 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 15:35:06,416 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 15:35:06,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:35:06,631 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 15:35:06,653 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 15:35:06,670 INFO L208 MainTranslator]: Completed translation [2020-08-18 15:35:06,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:06 WrapperNode [2020-08-18 15:35:06,671 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 15:35:06,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 15:35:06,672 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 15:35:06,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 15:35:06,772 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:06" (1/1) ... [2020-08-18 15:35:06,773 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:06" (1/1) ... [2020-08-18 15:35:06,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:06" (1/1) ... [2020-08-18 15:35:06,782 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:06" (1/1) ... [2020-08-18 15:35:06,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:06" (1/1) ... [2020-08-18 15:35:06,795 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:06" (1/1) ... [2020-08-18 15:35:06,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:06" (1/1) ... [2020-08-18 15:35:06,799 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 15:35:06,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 15:35:06,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 15:35:06,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 15:35:06,801 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 15:35:06,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 15:35:06,857 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 15:35:06,857 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 15:35:06,858 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 15:35:06,858 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 15:35:06,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 15:35:06,858 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 15:35:06,858 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 15:35:06,858 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 15:35:06,859 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 15:35:06,859 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-18 15:35:06,859 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 15:35:06,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 15:35:06,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-18 15:35:06,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 15:35:06,860 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 15:35:06,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 15:35:06,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 15:35:06,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 15:35:07,154 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 15:35:07,154 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 15:35:07,158 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:35:07 BoogieIcfgContainer [2020-08-18 15:35:07,159 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 15:35:07,160 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 15:35:07,160 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 15:35:07,163 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 15:35:07,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 03:35:06" (1/3) ... [2020-08-18 15:35:07,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9d79ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:35:07, skipping insertion in model container [2020-08-18 15:35:07,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 03:35:06" (2/3) ... [2020-08-18 15:35:07,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a9d79ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 03:35:07, skipping insertion in model container [2020-08-18 15:35:07,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 03:35:07" (3/3) ... [2020-08-18 15:35:07,167 INFO L109 eAbstractionObserver]: Analyzing ICFG brs2f.c [2020-08-18 15:35:07,178 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 15:35:07,185 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 15:35:07,208 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 15:35:07,234 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 15:35:07,235 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 15:35:07,235 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 15:35:07,235 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 15:35:07,235 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 15:35:07,235 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 15:35:07,235 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 15:35:07,235 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 15:35:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-18 15:35:07,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 15:35:07,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:07,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:07,259 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:07,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:07,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-18 15:35:07,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:07,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1455694211] [2020-08-18 15:35:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:07,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:07,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:07,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 15:35:07,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:07,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:07,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1455694211] [2020-08-18 15:35:07,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:35:07,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 15:35:07,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753438649] [2020-08-18 15:35:07,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 15:35:07,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:07,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 15:35:07,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:35:07,521 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-18 15:35:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:07,642 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-18 15:35:07,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 15:35:07,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 15:35:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:07,663 INFO L225 Difference]: With dead ends: 56 [2020-08-18 15:35:07,663 INFO L226 Difference]: Without dead ends: 26 [2020-08-18 15:35:07,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 15:35:07,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-18 15:35:07,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-18 15:35:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 15:35:07,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-18 15:35:07,708 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-08-18 15:35:07,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:07,709 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-18 15:35:07,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 15:35:07,710 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-18 15:35:07,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 15:35:07,711 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:07,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:07,711 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 15:35:07,712 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:07,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:07,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-18 15:35:07,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:07,713 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955314535] [2020-08-18 15:35:07,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:07,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:07,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:07,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 15:35:07,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:07,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955314535] [2020-08-18 15:35:07,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:35:07,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 15:35:07,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418915662] [2020-08-18 15:35:07,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:35:07,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:07,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:35:07,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:35:07,841 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-08-18 15:35:08,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:08,001 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-18 15:35:08,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 15:35:08,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-18 15:35:08,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:08,003 INFO L225 Difference]: With dead ends: 45 [2020-08-18 15:35:08,003 INFO L226 Difference]: Without dead ends: 32 [2020-08-18 15:35:08,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 15:35:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-18 15:35:08,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-18 15:35:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-18 15:35:08,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-18 15:35:08,013 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-08-18 15:35:08,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:08,013 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-18 15:35:08,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:35:08,014 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-18 15:35:08,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 15:35:08,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:08,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:08,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 15:35:08,016 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:08,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:08,016 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-18 15:35:08,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:08,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838322968] [2020-08-18 15:35:08,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:08,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:08,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:08,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:08,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 15:35:08,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:08,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-18 15:35:08,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838322968] [2020-08-18 15:35:08,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 15:35:08,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 15:35:08,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767545945] [2020-08-18 15:35:08,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:35:08,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:08,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:35:08,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:35:08,193 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-08-18 15:35:08,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:08,418 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-18 15:35:08,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 15:35:08,419 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-18 15:35:08,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:08,420 INFO L225 Difference]: With dead ends: 39 [2020-08-18 15:35:08,420 INFO L226 Difference]: Without dead ends: 33 [2020-08-18 15:35:08,421 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-08-18 15:35:08,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-18 15:35:08,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-18 15:35:08,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-18 15:35:08,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-18 15:35:08,429 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-08-18 15:35:08,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:08,430 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-18 15:35:08,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:35:08,430 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-18 15:35:08,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 15:35:08,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:08,431 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:08,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 15:35:08,432 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:08,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:08,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-08-18 15:35:08,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:08,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766357656] [2020-08-18 15:35:08,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:08,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:08,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:08,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 15:35:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:08,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:08,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766357656] [2020-08-18 15:35:08,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:08,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 15:35:08,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703123947] [2020-08-18 15:35:08,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 15:35:08,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:08,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 15:35:08,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-18 15:35:08,543 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-08-18 15:35:08,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:08,713 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-18 15:35:08,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 15:35:08,714 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-08-18 15:35:08,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:08,715 INFO L225 Difference]: With dead ends: 54 [2020-08-18 15:35:08,715 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 15:35:08,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:35:08,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 15:35:08,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-18 15:35:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-18 15:35:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-18 15:35:08,724 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-08-18 15:35:08,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:08,724 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-18 15:35:08,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 15:35:08,725 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-18 15:35:08,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 15:35:08,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:08,726 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:08,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 15:35:08,727 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:08,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 2 times [2020-08-18 15:35:08,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:08,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581479479] [2020-08-18 15:35:08,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:08,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:08,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:08,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 15:35:08,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:08,908 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-18 15:35:08,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581479479] [2020-08-18 15:35:08,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:08,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 15:35:08,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555255071] [2020-08-18 15:35:08,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 15:35:08,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:08,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 15:35:08,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:35:08,912 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-08-18 15:35:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:09,024 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-08-18 15:35:09,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 15:35:09,024 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-18 15:35:09,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:09,025 INFO L225 Difference]: With dead ends: 55 [2020-08-18 15:35:09,025 INFO L226 Difference]: Without dead ends: 38 [2020-08-18 15:35:09,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 15:35:09,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-18 15:35:09,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-08-18 15:35:09,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-18 15:35:09,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-18 15:35:09,040 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-08-18 15:35:09,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:09,040 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-18 15:35:09,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 15:35:09,041 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-18 15:35:09,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-18 15:35:09,044 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:09,044 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:09,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 15:35:09,045 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:09,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:09,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-08-18 15:35:09,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:09,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185420659] [2020-08-18 15:35:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:09,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:09,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:09,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:09,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 15:35:09,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:09,362 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:09,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185420659] [2020-08-18 15:35:09,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:09,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 15:35:09,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38437527] [2020-08-18 15:35:09,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 15:35:09,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:09,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 15:35:09,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-08-18 15:35:09,366 INFO L87 Difference]: Start difference. First operand 36 states and 39 transitions. Second operand 14 states. [2020-08-18 15:35:09,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:09,833 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-18 15:35:09,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 15:35:09,834 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-08-18 15:35:09,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:09,835 INFO L225 Difference]: With dead ends: 46 [2020-08-18 15:35:09,835 INFO L226 Difference]: Without dead ends: 40 [2020-08-18 15:35:09,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-08-18 15:35:09,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-18 15:35:09,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-08-18 15:35:09,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-08-18 15:35:09,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-08-18 15:35:09,843 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 33 [2020-08-18 15:35:09,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:09,843 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-08-18 15:35:09,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 15:35:09,843 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-08-18 15:35:09,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-18 15:35:09,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:09,844 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:09,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 15:35:09,845 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:09,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:09,845 INFO L82 PathProgramCache]: Analyzing trace with hash -2145280396, now seen corresponding path program 2 times [2020-08-18 15:35:09,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:09,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766206545] [2020-08-18 15:35:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:09,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:09,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 15:35:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:09,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-18 15:35:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 15:35:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 15:35:09,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766206545] [2020-08-18 15:35:09,952 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 15:35:09,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 15:35:09,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985484223] [2020-08-18 15:35:09,953 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 15:35:09,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 15:35:09,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 15:35:09,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-18 15:35:09,954 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2020-08-18 15:35:10,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 15:35:10,138 INFO L93 Difference]: Finished difference Result 66 states and 73 transitions. [2020-08-18 15:35:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 15:35:10,141 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-08-18 15:35:10,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 15:35:10,142 INFO L225 Difference]: With dead ends: 66 [2020-08-18 15:35:10,142 INFO L226 Difference]: Without dead ends: 44 [2020-08-18 15:35:10,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-18 15:35:10,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-18 15:35:10,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-08-18 15:35:10,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-18 15:35:10,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-18 15:35:10,152 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 36 [2020-08-18 15:35:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 15:35:10,153 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-18 15:35:10,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 15:35:10,153 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-18 15:35:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-08-18 15:35:10,159 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 15:35:10,159 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 15:35:10,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 15:35:10,160 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 15:35:10,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 15:35:10,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1680039082, now seen corresponding path program 3 times [2020-08-18 15:35:10,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 15:35:10,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498027608] [2020-08-18 15:35:10,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 15:35:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-18 15:35:10,223 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-18 15:35:10,223 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-18 15:35:10,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 15:35:10,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 03:35:10 BoogieIcfgContainer [2020-08-18 15:35:10,263 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 15:35:10,266 INFO L168 Benchmark]: Toolchain (without parser) took 3884.11 ms. Allocated memory was 148.4 MB in the beginning and 242.7 MB in the end (delta: 94.4 MB). Free memory was 104.7 MB in the beginning and 112.7 MB in the end (delta: -8.0 MB). Peak memory consumption was 86.4 MB. Max. memory is 7.1 GB. [2020-08-18 15:35:10,267 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.5 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-18 15:35:10,268 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.73 ms. Allocated memory is still 148.4 MB. Free memory was 104.7 MB in the beginning and 93.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-08-18 15:35:10,269 INFO L168 Benchmark]: Boogie Preprocessor took 127.32 ms. Allocated memory was 148.4 MB in the beginning and 203.4 MB in the end (delta: 55.1 MB). Free memory was 93.7 MB in the beginning and 180.7 MB in the end (delta: -87.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-18 15:35:10,270 INFO L168 Benchmark]: RCFGBuilder took 359.67 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 164.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-08-18 15:35:10,271 INFO L168 Benchmark]: TraceAbstraction took 3103.27 ms. Allocated memory was 203.4 MB in the beginning and 242.7 MB in the end (delta: 39.3 MB). Free memory was 163.4 MB in the beginning and 112.7 MB in the end (delta: 50.7 MB). Peak memory consumption was 90.0 MB. Max. memory is 7.1 GB. [2020-08-18 15:35:10,275 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 148.4 MB. Free memory was 122.9 MB in the beginning and 122.5 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 288.73 ms. Allocated memory is still 148.4 MB. Free memory was 104.7 MB in the beginning and 93.7 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.32 ms. Allocated memory was 148.4 MB in the beginning and 203.4 MB in the end (delta: 55.1 MB). Free memory was 93.7 MB in the beginning and 180.7 MB in the end (delta: -87.0 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 359.67 ms. Allocated memory is still 203.4 MB. Free memory was 180.7 MB in the beginning and 164.3 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3103.27 ms. Allocated memory was 203.4 MB in the beginning and 242.7 MB in the end (delta: 39.3 MB). Free memory was 163.4 MB in the beginning and 112.7 MB in the end (delta: 50.7 MB). Peak memory consumption was 90.0 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