/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 --rcfgbuilder.size.of.a.code.block SingleStatement --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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --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/simple_3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 20:42:20,694 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 20:42:20,698 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 20:42:20,725 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 20:42:20,725 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 20:42:20,727 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 20:42:20,728 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 20:42:20,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 20:42:20,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 20:42:20,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 20:42:20,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 20:42:20,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 20:42:20,736 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 20:42:20,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 20:42:20,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 20:42:20,740 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 20:42:20,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 20:42:20,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 20:42:20,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 20:42:20,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 20:42:20,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 20:42:20,750 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 20:42:20,752 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 20:42:20,755 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 20:42:20,758 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 20:42:20,758 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 20:42:20,758 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 20:42:20,760 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 20:42:20,760 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 20:42:20,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 20:42:20,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 20:42:20,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 20:42:20,764 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 20:42:20,765 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 20:42:20,766 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 20:42:20,766 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 20:42:20,767 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 20:42:20,767 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 20:42:20,767 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 20:42:20,769 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 20:42:20,770 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 20:42:20,771 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 [2020-09-24 20:42:20,799 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 20:42:20,799 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 20:42:20,801 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 20:42:20,801 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 20:42:20,801 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 20:42:20,801 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 20:42:20,802 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 20:42:20,802 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 20:42:20,802 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 20:42:20,802 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 20:42:20,803 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 20:42:20,803 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 20:42:20,803 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 20:42:20,803 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 20:42:20,803 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 20:42:20,804 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 20:42:20,804 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 20:42:20,804 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 20:42:20,804 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 20:42:20,805 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 20:42:20,805 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 20:42:20,805 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 20:42:20,805 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 20:42:20,805 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 20:42:20,806 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 20:42:20,806 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 20:42:20,806 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 20:42:20,806 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 20:42:20,806 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 20:42:20,807 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.rcfgbuilder: Size of a code block -> SingleStatement 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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-09-24 20:42:21,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 20:42:21,312 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 20:42:21,317 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 20:42:21,320 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 20:42:21,322 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 20:42:21,323 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_3-1.c [2020-09-24 20:42:21,405 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a573e46c/f06b6625bd68452788d877eefb20fffe/FLAG07d47116c [2020-09-24 20:42:21,953 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 20:42:21,955 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_3-1.c [2020-09-24 20:42:21,964 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a573e46c/f06b6625bd68452788d877eefb20fffe/FLAG07d47116c [2020-09-24 20:42:22,307 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5a573e46c/f06b6625bd68452788d877eefb20fffe [2020-09-24 20:42:22,323 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 20:42:22,330 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 20:42:22,337 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 20:42:22,338 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 20:42:22,342 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 20:42:22,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:42:22" (1/1) ... [2020-09-24 20:42:22,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1840d501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:22, skipping insertion in model container [2020-09-24 20:42:22,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 08:42:22" (1/1) ... [2020-09-24 20:42:22,360 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 20:42:22,383 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 20:42:22,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:42:22,611 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 20:42:22,632 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 20:42:22,650 INFO L208 MainTranslator]: Completed translation [2020-09-24 20:42:22,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:22 WrapperNode [2020-09-24 20:42:22,651 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 20:42:22,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 20:42:22,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 20:42:22,652 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 20:42:22,668 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:22" (1/1) ... [2020-09-24 20:42:22,669 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:22" (1/1) ... [2020-09-24 20:42:22,674 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:22" (1/1) ... [2020-09-24 20:42:22,675 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:22" (1/1) ... [2020-09-24 20:42:22,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:22" (1/1) ... [2020-09-24 20:42:22,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:22" (1/1) ... [2020-09-24 20:42:22,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:22" (1/1) ... [2020-09-24 20:42:22,770 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 20:42:22,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 20:42:22,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 20:42:22,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 20:42:22,772 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:22" (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 [2020-09-24 20:42:22,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 20:42:22,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 20:42:22,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 20:42:22,853 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 20:42:22,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 20:42:22,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ushort [2020-09-24 20:42:22,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 20:42:22,854 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 20:42:22,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 20:42:22,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 20:42:23,067 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 20:42:23,067 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 20:42:23,072 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:42:23 BoogieIcfgContainer [2020-09-24 20:42:23,072 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 20:42:23,073 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 20:42:23,073 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 20:42:23,077 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 20:42:23,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 08:42:22" (1/3) ... [2020-09-24 20:42:23,079 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f07bba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:42:23, skipping insertion in model container [2020-09-24 20:42:23,081 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 08:42:22" (2/3) ... [2020-09-24 20:42:23,082 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f07bba6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 08:42:23, skipping insertion in model container [2020-09-24 20:42:23,082 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 08:42:23" (3/3) ... [2020-09-24 20:42:23,084 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_3-1.c [2020-09-24 20:42:23,097 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 20:42:23,107 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 20:42:23,126 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 20:42:23,153 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 20:42:23,154 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 20:42:23,154 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 20:42:23,154 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 20:42:23,154 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 20:42:23,154 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 20:42:23,154 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 20:42:23,155 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 20:42:23,174 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-09-24 20:42:23,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 20:42:23,181 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:23,182 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:23,182 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:23,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:23,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1456818433, now seen corresponding path program 1 times [2020-09-24 20:42:23,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:23,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616520376] [2020-09-24 20:42:23,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:23,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:23,322 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:23,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 20:42:23,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:23,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-09-24 20:42:23,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:23,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:23,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-09-24 20:42:23,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:23,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 20:42:23,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 20:42:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 20:42:23,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 20:42:23,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 20:42:23,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 20:42:23,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 20:42:23,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 20:42:23,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-09-24 20:42:23,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 20:42:23,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 20:42:23,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 20:42:23,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 20:42:23,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 20:42:23,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616520376] [2020-09-24 20:42:23,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 20:42:23,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 20:42:23,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91445590] [2020-09-24 20:42:23,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 20:42:23,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 20:42:23,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 20:42:23,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 20:42:23,393 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 2 states. [2020-09-24 20:42:23,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 20:42:23,417 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-09-24 20:42:23,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 20:42:23,419 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-24 20:42:23,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 20:42:23,427 INFO L225 Difference]: With dead ends: 31 [2020-09-24 20:42:23,428 INFO L226 Difference]: Without dead ends: 14 [2020-09-24 20:42:23,431 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 [2020-09-24 20:42:23,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-24 20:42:23,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-09-24 20:42:23,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-09-24 20:42:23,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2020-09-24 20:42:23,476 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2020-09-24 20:42:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 20:42:23,476 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2020-09-24 20:42:23,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 20:42:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2020-09-24 20:42:23,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 20:42:23,477 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 20:42:23,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 20:42:23,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 20:42:23,478 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 20:42:23,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 20:42:23,479 INFO L82 PathProgramCache]: Analyzing trace with hash 1452200828, now seen corresponding path program 1 times [2020-09-24 20:42:23,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 20:42:23,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706493018] [2020-09-24 20:42:23,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 20:42:23,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-24 20:42:23,525 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-24 20:42:23,525 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-24 20:42:23,530 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 20:42:23,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.09 08:42:23 BoogieIcfgContainer [2020-09-24 20:42:23,545 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-24 20:42:23,548 INFO L168 Benchmark]: Toolchain (without parser) took 1222.08 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 102.9 MB in the beginning and 145.0 MB in the end (delta: -42.1 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:23,549 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 146.8 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-24 20:42:23,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.00 ms. Allocated memory is still 146.8 MB. Free memory was 101.9 MB in the beginning and 92.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:23,552 INFO L168 Benchmark]: Boogie Preprocessor took 117.93 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 92.6 MB in the beginning and 181.9 MB in the end (delta: -89.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:23,553 INFO L168 Benchmark]: RCFGBuilder took 302.08 ms. Allocated memory is still 202.9 MB. Free memory was 181.9 MB in the beginning and 170.2 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:23,554 INFO L168 Benchmark]: TraceAbstraction took 471.81 ms. Allocated memory is still 202.9 MB. Free memory was 169.6 MB in the beginning and 145.7 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-09-24 20:42:23,558 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 146.8 MB. Free memory was 121.5 MB in the beginning and 121.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 314.00 ms. Allocated memory is still 146.8 MB. Free memory was 101.9 MB in the beginning and 92.6 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.93 ms. Allocated memory was 146.8 MB in the beginning and 202.9 MB in the end (delta: 56.1 MB). Free memory was 92.6 MB in the beginning and 181.9 MB in the end (delta: -89.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 302.08 ms. Allocated memory is still 202.9 MB. Free memory was 181.9 MB in the beginning and 170.2 MB in the end (delta: 11.7 MB). Peak memory consumption was 11.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 471.81 ms. Allocated memory is still 202.9 MB. Free memory was 169.6 MB in the beginning and 145.7 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] unsigned int x = 0; [L13] unsigned short N = __VERIFIER_nondet_ushort(); [L15] COND FALSE !(x < N) [L19] CALL __VERIFIER_assert(x % 2) [L5] COND TRUE !(cond) [L6] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 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: 20 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=20occurred 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, 24 NumberOfCodeBlocks, 24 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 11 ConstructedInterpolants, 0 QuantifiedInterpolants, 121 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...