/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 19:03:38,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:03:38,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:03:38,065 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:03:38,065 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:03:38,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:03:38,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:03:38,082 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:03:38,086 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:03:38,087 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:03:38,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:03:38,091 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:03:38,091 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:03:38,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:03:38,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:03:38,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:03:38,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:03:38,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:03:38,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:03:38,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:03:38,113 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:03:38,115 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:03:38,116 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:03:38,117 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:03:38,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:03:38,121 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:03:38,121 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:03:38,124 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:03:38,124 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:03:38,125 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-21 19:03:38,125 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-21 19:03:38,129 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-21 19:03:38,130 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-21 19:03:38,131 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-21 19:03:38,132 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-21 19:03:38,133 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-21 19:03:38,133 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-21 19:03:38,133 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-21 19:03:38,134 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:03:38,135 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:03:38,136 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:03:38,137 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-21 19:03:38,181 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:03:38,181 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:03:38,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:03:38,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:03:38,184 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:03:38,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:03:38,185 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:03:38,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:03:38,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:03:38,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:03:38,187 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:03:38,187 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:03:38,187 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:03:38,188 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:03:38,188 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:03:38,188 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:03:38,188 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:03:38,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:03:38,189 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:03:38,189 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:03:38,189 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:03:38,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:03:38,189 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:03:38,190 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:03:38,190 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:03:38,190 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:03:38,190 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:03:38,190 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:03:38,191 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:03:38,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 19:03:38,479 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:03:38,491 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:03:38,494 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:03:38,495 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:03:38,496 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:03:38,496 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-08-21 19:03:38,566 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e0a3a8a8/fbb7881ed5744c00b1bdbc4c9a9ad9a2/FLAG7eda2f277 [2020-08-21 19:03:39,044 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:03:39,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs3f.c [2020-08-21 19:03:39,051 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e0a3a8a8/fbb7881ed5744c00b1bdbc4c9a9ad9a2/FLAG7eda2f277 [2020-08-21 19:03:39,416 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4e0a3a8a8/fbb7881ed5744c00b1bdbc4c9a9ad9a2 [2020-08-21 19:03:39,424 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:03:39,426 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:03:39,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:03:39,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:03:39,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:03:39,431 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:03:39" (1/1) ... [2020-08-21 19:03:39,434 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7730d90c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:39, skipping insertion in model container [2020-08-21 19:03:39,434 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:03:39" (1/1) ... [2020-08-21 19:03:39,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:03:39,461 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:03:39,716 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:03:39,726 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:03:39,748 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:03:39,855 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:03:39,856 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:39 WrapperNode [2020-08-21 19:03:39,856 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:03:39,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:03:39,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:03:39,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:03:39,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:39" (1/1) ... [2020-08-21 19:03:39,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:39" (1/1) ... [2020-08-21 19:03:39,881 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:39" (1/1) ... [2020-08-21 19:03:39,881 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:39" (1/1) ... [2020-08-21 19:03:39,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:39" (1/1) ... [2020-08-21 19:03:39,895 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:39" (1/1) ... [2020-08-21 19:03:39,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:39" (1/1) ... [2020-08-21 19:03:39,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:03:39,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:03:39,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:03:39,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:03:39,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:39" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:03:39,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:03:39,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:03:39,965 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-21 19:03:39,965 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 19:03:39,965 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:03:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:03:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-21 19:03:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-21 19:03:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 19:03:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:03:39,966 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-21 19:03:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:03:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 19:03:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-21 19:03:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 19:03:39,967 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 19:03:39,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 19:03:39,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:03:39,968 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:03:40,320 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:03:40,321 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 19:03:40,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:03:40 BoogieIcfgContainer [2020-08-21 19:03:40,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:03:40,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:03:40,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:03:40,330 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:03:40,331 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:03:39" (1/3) ... [2020-08-21 19:03:40,331 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c77a21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:03:40, skipping insertion in model container [2020-08-21 19:03:40,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:03:39" (2/3) ... [2020-08-21 19:03:40,332 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37c77a21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:03:40, skipping insertion in model container [2020-08-21 19:03:40,332 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:03:40" (3/3) ... [2020-08-21 19:03:40,334 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-08-21 19:03:40,345 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:03:40,353 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:03:40,372 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:03:40,401 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:03:40,402 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:03:40,402 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:03:40,402 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:03:40,402 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:03:40,402 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:03:40,402 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:03:40,403 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:03:40,419 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-21 19:03:40,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 19:03:40,425 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:03:40,426 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:03:40,426 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:03:40,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:03:40,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-08-21 19:03:40,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:03:40,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19995005] [2020-08-21 19:03:40,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:03:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:40,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:03:40,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:40,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 19:03:40,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:40,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:03:40,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19995005] [2020-08-21 19:03:40,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:03:40,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 19:03:40,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222044262] [2020-08-21 19:03:40,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 19:03:40,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:03:40,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 19:03:40,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 19:03:40,703 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-08-21 19:03:40,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:03:40,827 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-08-21 19:03:40,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 19:03:40,829 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 19:03:40,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:03:40,839 INFO L225 Difference]: With dead ends: 56 [2020-08-21 19:03:40,839 INFO L226 Difference]: Without dead ends: 26 [2020-08-21 19:03:40,844 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 [2020-08-21 19:03:40,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-08-21 19:03:40,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-08-21 19:03:40,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-21 19:03:40,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-21 19:03:40,889 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-08-21 19:03:40,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:03:40,889 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-21 19:03:40,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 19:03:40,890 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-21 19:03:40,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 19:03:40,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:03:40,891 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:03:40,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:03:40,892 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:03:40,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:03:40,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-08-21 19:03:40,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:03:40,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042980137] [2020-08-21 19:03:40,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:03:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:41,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:03:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:41,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 19:03:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:03:41,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042980137] [2020-08-21 19:03:41,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:03:41,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:03:41,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799630602] [2020-08-21 19:03:41,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:03:41,047 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:03:41,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:03:41,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:03:41,048 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 5 states. [2020-08-21 19:03:41,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:03:41,201 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2020-08-21 19:03:41,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 19:03:41,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-08-21 19:03:41,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:03:41,203 INFO L225 Difference]: With dead ends: 45 [2020-08-21 19:03:41,203 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 19:03:41,204 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 [2020-08-21 19:03:41,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 19:03:41,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-08-21 19:03:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-21 19:03:41,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-08-21 19:03:41,214 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2020-08-21 19:03:41,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:03:41,214 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-08-21 19:03:41,214 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:03:41,214 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-08-21 19:03:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 19:03:41,215 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:03:41,215 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] [2020-08-21 19:03:41,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:03:41,216 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:03:41,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:03:41,217 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-08-21 19:03:41,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:03:41,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687461511] [2020-08-21 19:03:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:03:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:41,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:03:41,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:41,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 19:03:41,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-08-21 19:03:41,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687461511] [2020-08-21 19:03:41,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:03:41,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-21 19:03:41,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457063005] [2020-08-21 19:03:41,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 19:03:41,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:03:41,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 19:03:41,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:03:41,433 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2020-08-21 19:03:41,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:03:41,683 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2020-08-21 19:03:41,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 19:03:41,684 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-08-21 19:03:41,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:03:41,685 INFO L225 Difference]: With dead ends: 39 [2020-08-21 19:03:41,685 INFO L226 Difference]: Without dead ends: 33 [2020-08-21 19:03:41,686 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 [2020-08-21 19:03:41,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-08-21 19:03:41,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-08-21 19:03:41,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-21 19:03:41,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-21 19:03:41,694 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-08-21 19:03:41,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:03:41,694 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-21 19:03:41,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 19:03:41,695 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-21 19:03:41,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 19:03:41,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:03:41,696 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] [2020-08-21 19:03:41,696 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:03:41,696 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:03:41,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:03:41,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-08-21 19:03:41,697 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:03:41,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949928062] [2020-08-21 19:03:41,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:03:41,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:41,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:03:41,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:41,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 19:03:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 19:03:41,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949928062] [2020-08-21 19:03:41,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:03:41,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 19:03:41,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537564223] [2020-08-21 19:03:41,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 19:03:41,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:03:41,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 19:03:41,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-21 19:03:41,797 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 8 states. [2020-08-21 19:03:41,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:03:41,949 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-08-21 19:03:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 19:03:41,950 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-08-21 19:03:41,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:03:41,951 INFO L225 Difference]: With dead ends: 54 [2020-08-21 19:03:41,951 INFO L226 Difference]: Without dead ends: 38 [2020-08-21 19:03:41,952 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 [2020-08-21 19:03:41,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-21 19:03:41,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-08-21 19:03:41,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 19:03:41,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-08-21 19:03:41,959 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-08-21 19:03:41,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:03:41,960 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-08-21 19:03:41,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 19:03:41,960 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-08-21 19:03:41,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 19:03:41,961 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:03:41,961 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] [2020-08-21 19:03:41,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:03:41,962 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:03:41,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:03:41,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1781264291, now seen corresponding path program 2 times [2020-08-21 19:03:41,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:03:41,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341908789] [2020-08-21 19:03:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:03:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:42,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:03:42,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:42,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-08-21 19:03:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:03:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-21 19:03:42,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341908789] [2020-08-21 19:03:42,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:03:42,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 19:03:42,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618272015] [2020-08-21 19:03:42,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:03:42,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:03:42,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:03:42,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:03:42,070 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 5 states. [2020-08-21 19:03:42,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:03:42,169 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2020-08-21 19:03:42,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:03:42,170 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-21 19:03:42,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:03:42,172 INFO L225 Difference]: With dead ends: 55 [2020-08-21 19:03:42,172 INFO L226 Difference]: Without dead ends: 38 [2020-08-21 19:03:42,173 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 [2020-08-21 19:03:42,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-21 19:03:42,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-08-21 19:03:42,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-08-21 19:03:42,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 39 transitions. [2020-08-21 19:03:42,180 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 39 transitions. Word has length 33 [2020-08-21 19:03:42,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:03:42,181 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 39 transitions. [2020-08-21 19:03:42,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:03:42,181 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 39 transitions. [2020-08-21 19:03:42,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-21 19:03:42,182 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:03:42,182 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] [2020-08-21 19:03:42,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:03:42,183 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:03:42,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:03:42,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-08-21 19:03:42,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:03:42,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10648887] [2020-08-21 19:03:42,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:03:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-21 19:03:42,221 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-21 19:03:42,221 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-21 19:03:42,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 19:03:42,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:03:42 BoogieIcfgContainer [2020-08-21 19:03:42,249 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:03:42,252 INFO L168 Benchmark]: Toolchain (without parser) took 2825.25 ms. Allocated memory was 140.5 MB in the beginning and 233.3 MB in the end (delta: 92.8 MB). Free memory was 103.0 MB in the beginning and 123.7 MB in the end (delta: -20.7 MB). Peak memory consumption was 72.1 MB. Max. memory is 7.1 GB. [2020-08-21 19:03:42,253 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. [2020-08-21 19:03:42,255 INFO L168 Benchmark]: CACSL2BoogieTranslator took 429.94 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 103.0 MB in the beginning and 183.2 MB in the end (delta: -80.1 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. [2020-08-21 19:03:42,255 INFO L168 Benchmark]: Boogie Preprocessor took 42.27 ms. Allocated memory is still 204.5 MB. Free memory was 183.2 MB in the beginning and 180.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. [2020-08-21 19:03:42,256 INFO L168 Benchmark]: RCFGBuilder took 425.82 ms. Allocated memory is still 204.5 MB. Free memory was 180.9 MB in the beginning and 164.5 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-08-21 19:03:42,257 INFO L168 Benchmark]: TraceAbstraction took 1922.32 ms. Allocated memory was 204.5 MB in the beginning and 233.3 MB in the end (delta: 28.8 MB). Free memory was 163.5 MB in the beginning and 123.7 MB in the end (delta: 39.8 MB). Peak memory consumption was 68.7 MB. Max. memory is 7.1 GB. [2020-08-21 19:03:42,261 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.5 kB). Peak memory consumption was 419.5 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 429.94 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 103.0 MB in the beginning and 183.2 MB in the end (delta: -80.1 MB). Peak memory consumption was 22.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 42.27 ms. Allocated memory is still 204.5 MB. Free memory was 183.2 MB in the beginning and 180.9 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 425.82 ms. Allocated memory is still 204.5 MB. Free memory was 180.9 MB in the beginning and 164.5 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1922.32 ms. Allocated memory was 204.5 MB in the beginning and 233.3 MB in the end (delta: 28.8 MB). Free memory was 163.5 MB in the beginning and 123.7 MB in the end (delta: 39.8 MB). Peak memory consumption was 68.7 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