/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 produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/phases_2-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:31:28,282 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:31:28,287 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:31:28,330 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:31:28,332 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:31:28,341 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:31:28,343 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:31:28,347 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:31:28,350 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:31:28,353 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:31:28,354 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:31:28,355 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:31:28,355 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:31:28,358 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:31:28,361 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:31:28,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:31:28,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:31:28,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:31:28,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:31:28,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:31:28,376 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:31:28,377 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:31:28,379 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:31:28,380 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:31:28,382 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:31:28,382 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:31:28,382 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:31:28,383 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:31:28,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:31:28,385 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:31:28,385 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:31:28,386 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:31:28,387 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:31:28,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:31:28,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:31:28,389 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:31:28,390 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:31:28,391 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:31:28,391 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:31:28,392 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:31:28,393 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:31:28,394 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-21 11:31:28,420 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:31:28,420 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:31:28,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:31:28,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:31:28,422 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:31:28,422 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:31:28,423 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:31:28,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:31:28,423 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:31:28,423 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:31:28,423 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:31:28,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:31:28,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:31:28,424 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:31:28,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:31:28,425 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:31:28,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:31:28,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:31:28,425 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:31:28,425 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:31:28,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:31:28,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:31:28,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:31:28,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:31:28,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:31:28,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:31:28,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:31:28,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:31:28,427 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:31:28,428 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 -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:31:28,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:31:28,944 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:31:28,950 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:31:28,952 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:31:28,953 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:31:28,955 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/phases_2-1.c [2020-09-21 11:31:29,041 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c168510c6/1f6e3c76d119470f938aed91f8eefbe5/FLAGaa985d57d [2020-09-21 11:31:29,632 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:31:29,632 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/phases_2-1.c [2020-09-21 11:31:29,641 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c168510c6/1f6e3c76d119470f938aed91f8eefbe5/FLAGaa985d57d [2020-09-21 11:31:29,902 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c168510c6/1f6e3c76d119470f938aed91f8eefbe5 [2020-09-21 11:31:29,918 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:31:29,927 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:31:29,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:29,931 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:31:29,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:31:29,936 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:29" (1/1) ... [2020-09-21 11:31:29,942 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47a8d835 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:29, skipping insertion in model container [2020-09-21 11:31:29,942 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:31:29" (1/1) ... [2020-09-21 11:31:29,952 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:31:29,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:31:30,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:30,209 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:31:30,226 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:31:30,242 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:31:30,242 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:30 WrapperNode [2020-09-21 11:31:30,242 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:31:30,243 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:31:30,243 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:31:30,243 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:31:30,257 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:30" (1/1) ... [2020-09-21 11:31:30,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:30" (1/1) ... [2020-09-21 11:31:30,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:30" (1/1) ... [2020-09-21 11:31:30,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:30" (1/1) ... [2020-09-21 11:31:30,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:30" (1/1) ... [2020-09-21 11:31:30,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:30" (1/1) ... [2020-09-21 11:31:30,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:30" (1/1) ... [2020-09-21 11:31:30,352 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:31:30,353 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:31:30,353 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:31:30,353 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:31:30,354 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:30" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:31:30,428 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:31:30,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:31:30,429 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-21 11:31:30,429 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-21 11:31:30,429 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:31:30,429 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:31:30,430 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-21 11:31:30,430 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-21 11:31:30,433 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-09-21 11:31:30,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-21 11:31:30,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:31:30,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:31:30,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:31:30,679 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:31:30,680 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-21 11:31:30,684 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:30 BoogieIcfgContainer [2020-09-21 11:31:30,684 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:31:30,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:31:30,686 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:31:30,690 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:31:30,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:31:29" (1/3) ... [2020-09-21 11:31:30,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9fd318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:30, skipping insertion in model container [2020-09-21 11:31:30,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:31:30" (2/3) ... [2020-09-21 11:31:30,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9fd318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:31:30, skipping insertion in model container [2020-09-21 11:31:30,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:31:30" (3/3) ... [2020-09-21 11:31:30,694 INFO L109 eAbstractionObserver]: Analyzing ICFG phases_2-1.c [2020-09-21 11:31:30,705 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:31:30,715 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:31:30,736 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:31:30,766 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:31:30,766 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:31:30,766 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:31:30,766 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:31:30,766 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:31:30,767 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:31:30,767 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:31:30,767 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:31:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-09-21 11:31:30,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 11:31:30,793 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:30,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:30,794 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:30,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:30,802 INFO L82 PathProgramCache]: Analyzing trace with hash 900249630, now seen corresponding path program 1 times [2020-09-21 11:31:30,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:30,812 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325169019] [2020-09-21 11:31:30,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:30,925 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:30,925 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:30,925 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:30,926 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:30,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-21 11:31:30,926 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:30,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:31:30,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:30,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:30,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:31:30,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:30,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:31:30,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:31:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:31:30,958 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:31:30,959 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:31:30,959 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:31:30,960 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:31:30,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-21 11:31:30,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:31:30,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:31:30,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:31:30,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:31:30,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:31:30,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:31:30,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:31:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:31:30,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325169019] [2020-09-21 11:31:30,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:31:30,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-21 11:31:30,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516828204] [2020-09-21 11:31:30,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-21 11:31:30,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:31:31,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-21 11:31:31,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:31:31,010 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-09-21 11:31:31,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:31:31,042 INFO L93 Difference]: Finished difference Result 30 states and 35 transitions. [2020-09-21 11:31:31,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-21 11:31:31,044 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-21 11:31:31,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:31:31,053 INFO L225 Difference]: With dead ends: 30 [2020-09-21 11:31:31,054 INFO L226 Difference]: Without dead ends: 13 [2020-09-21 11:31:31,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-21 11:31:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2020-09-21 11:31:31,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2020-09-21 11:31:31,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-21 11:31:31,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2020-09-21 11:31:31,095 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2020-09-21 11:31:31,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:31:31,095 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2020-09-21 11:31:31,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-21 11:31:31,095 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2020-09-21 11:31:31,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-21 11:31:31,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:31:31,096 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:31:31,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:31:31,097 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:31:31,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:31:31,098 INFO L82 PathProgramCache]: Analyzing trace with hash 891014420, now seen corresponding path program 1 times [2020-09-21 11:31:31,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:31:31,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18850595] [2020-09-21 11:31:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:31:31,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:31:31,145 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:31:31,146 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:31:31,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:31:31,170 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:31:31 BoogieIcfgContainer [2020-09-21 11:31:31,171 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:31:31,175 INFO L168 Benchmark]: Toolchain (without parser) took 1253.34 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 103.7 MB in the beginning and 144.4 MB in the end (delta: -40.7 MB). Peak memory consumption was 21.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:31,180 INFO L168 Benchmark]: CDTParser took 0.34 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-21 11:31:31,181 INFO L168 Benchmark]: CACSL2BoogieTranslator took 312.25 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 93.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:31,182 INFO L168 Benchmark]: Boogie Preprocessor took 109.30 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.7 MB in the beginning and 181.7 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:31,184 INFO L168 Benchmark]: RCFGBuilder took 331.72 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 168.7 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:31,186 INFO L168 Benchmark]: TraceAbstraction took 485.71 ms. Allocated memory is still 202.9 MB. Free memory was 168.0 MB in the beginning and 144.4 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. [2020-09-21 11:31:31,198 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 312.25 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 93.7 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.30 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 93.7 MB in the beginning and 181.7 MB in the end (delta: -88.0 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 331.72 ms. Allocated memory is still 202.9 MB. Free memory was 181.0 MB in the beginning and 168.7 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 485.71 ms. Allocated memory is still 202.9 MB. Free memory was 168.0 MB in the beginning and 144.4 MB in the end (delta: 23.6 MB). Peak memory consumption was 23.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 10]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L16] unsigned int x = 1; [L17] unsigned int y = __VERIFIER_nondet_uint(); [L19] COND FALSE !(!(y > 0)) [L21] COND FALSE !(x < y) [L29] CALL __VERIFIER_assert(x != y) [L9] COND TRUE !(cond) [L10] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.3s, OverallIterations: 2, TraceHistogramMax: 1, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 21 SDtfs, 0 SDslu, 0 SDs, 0 SdLazy, 0 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=19occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 22 NumberOfCodeBlocks, 22 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 100 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...