/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/res2of.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:18:49,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:18:49,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:18:49,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:18:49,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:18:49,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:18:49,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:18:49,999 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:18:50,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:18:50,004 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:18:50,005 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:18:50,008 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:18:50,009 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:18:50,012 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:18:50,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:18:50,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:18:50,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:18:50,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:18:50,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:18:50,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:18:50,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:18:50,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:18:50,041 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:18:50,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:18:50,044 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 20:18:50,045 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 20:18:50,045 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 20:18:50,046 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 20:18:50,047 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 20:18:50,048 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 20:18:50,048 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 20:18:50,049 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 20:18:50,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 20:18:50,051 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 20:18:50,052 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 20:18:50,052 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 20:18:50,053 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 20:18:50,053 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 20:18:50,054 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:18:50,055 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:18:50,056 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:18:50,057 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 20:18:50,074 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:18:50,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:18:50,076 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:18:50,076 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:18:50,076 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:18:50,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:18:50,076 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:18:50,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:18:50,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:18:50,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:18:50,077 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:18:50,077 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:18:50,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:18:50,078 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:18:50,078 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:18:50,078 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:18:50,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:18:50,079 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:18:50,079 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:18:50,079 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:18:50,079 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:18:50,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:18:50,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:18:50,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:18:50,080 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:18:50,080 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:18:50,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:50,081 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:18:50,081 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:18:50,081 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 20:18:50,498 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:18:50,524 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:18:50,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:18:50,536 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:18:50,540 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:18:50,541 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/res2of.c [2020-07-21 20:18:50,642 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9436774f/8ac2235ca4dc4cf499e522eaede779c9/FLAGb223fc538 [2020-07-21 20:18:51,178 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:18:51,179 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/res2of.c [2020-07-21 20:18:51,191 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9436774f/8ac2235ca4dc4cf499e522eaede779c9/FLAGb223fc538 [2020-07-21 20:18:51,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9436774f/8ac2235ca4dc4cf499e522eaede779c9 [2020-07-21 20:18:51,510 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:18:51,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:18:51,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:51,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:18:51,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:18:51,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:51" (1/1) ... [2020-07-21 20:18:51,523 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26cbfdd7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:51, skipping insertion in model container [2020-07-21 20:18:51,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:51" (1/1) ... [2020-07-21 20:18:51,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:18:51,552 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:18:51,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:51,796 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:18:51,829 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:51,853 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:18:51,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:51 WrapperNode [2020-07-21 20:18:51,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:51,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:18:51,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:18:51,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:18:52,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:51" (1/1) ... [2020-07-21 20:18:52,017 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:51" (1/1) ... [2020-07-21 20:18:52,046 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:51" (1/1) ... [2020-07-21 20:18:52,046 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:51" (1/1) ... [2020-07-21 20:18:52,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:51" (1/1) ... [2020-07-21 20:18:52,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:51" (1/1) ... [2020-07-21 20:18:52,098 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:51" (1/1) ... [2020-07-21 20:18:52,105 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:18:52,106 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:18:52,106 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:18:52,106 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:18:52,107 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:51" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-07-21 20:18:52,178 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:18:52,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:18:52,179 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:18:52,179 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:18:52,179 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:18:52,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:18:52,180 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:18:52,180 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:18:52,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:18:52,180 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:18:52,180 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 20:18:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:18:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 20:18:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 20:18:52,181 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:18:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:18:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:18:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:18:52,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:18:52,672 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:18:52,673 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-07-21 20:18:52,678 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:52 BoogieIcfgContainer [2020-07-21 20:18:52,678 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:18:52,679 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:18:52,679 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:18:52,685 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:18:52,686 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:18:51" (1/3) ... [2020-07-21 20:18:52,687 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c4c32d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:52, skipping insertion in model container [2020-07-21 20:18:52,687 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:51" (2/3) ... [2020-07-21 20:18:52,688 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32c4c32d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:52, skipping insertion in model container [2020-07-21 20:18:52,688 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:52" (3/3) ... [2020-07-21 20:18:52,691 INFO L109 eAbstractionObserver]: Analyzing ICFG res2of.c [2020-07-21 20:18:52,705 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:18:52,713 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:18:52,731 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:18:52,762 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:18:52,763 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:18:52,763 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:18:52,763 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:18:52,763 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:18:52,763 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:18:52,764 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:18:52,764 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:18:52,784 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states. [2020-07-21 20:18:52,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 20:18:52,791 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:52,793 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, 1, 1] [2020-07-21 20:18:52,793 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:52,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:52,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1797528887, now seen corresponding path program 1 times [2020-07-21 20:18:52,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:52,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080779252] [2020-07-21 20:18:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:52,948 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:18:52,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:52,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:52,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:53,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:18:53,049 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:53,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080779252] [2020-07-21 20:18:53,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:53,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:18:53,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563213545] [2020-07-21 20:18:53,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:18:53,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:53,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:18:53,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:18:53,087 INFO L87 Difference]: Start difference. First operand 43 states. Second operand 4 states. [2020-07-21 20:18:53,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:53,309 INFO L93 Difference]: Finished difference Result 92 states and 130 transitions. [2020-07-21 20:18:53,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:18:53,312 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-07-21 20:18:53,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:53,324 INFO L225 Difference]: With dead ends: 92 [2020-07-21 20:18:53,324 INFO L226 Difference]: Without dead ends: 48 [2020-07-21 20:18:53,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:18:53,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-21 20:18:53,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-07-21 20:18:53,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-21 20:18:53,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2020-07-21 20:18:53,386 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 29 [2020-07-21 20:18:53,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:53,386 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2020-07-21 20:18:53,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:18:53,386 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2020-07-21 20:18:53,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-07-21 20:18:53,389 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:53,389 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 20:18:53,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:53,605 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:53,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:53,606 INFO L82 PathProgramCache]: Analyzing trace with hash -774790125, now seen corresponding path program 1 times [2020-07-21 20:18:53,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:53,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269027379] [2020-07-21 20:18:53,608 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:53,715 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:53,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 20:18:53,716 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:18:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 20:18:53,769 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:18:53,826 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 20:18:53,826 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:18:54,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:54,131 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:18:54 BoogieIcfgContainer [2020-07-21 20:18:54,131 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:18:54,134 INFO L168 Benchmark]: Toolchain (without parser) took 2621.87 ms. Allocated memory was 143.7 MB in the beginning and 201.9 MB in the end (delta: 58.2 MB). Free memory was 101.4 MB in the beginning and 97.1 MB in the end (delta: 4.3 MB). Peak memory consumption was 62.5 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:54,136 INFO L168 Benchmark]: CDTParser took 0.37 ms. Allocated memory is still 143.7 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 20:18:54,137 INFO L168 Benchmark]: CACSL2BoogieTranslator took 340.65 ms. Allocated memory is still 143.7 MB. Free memory was 101.0 MB in the beginning and 90.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:54,139 INFO L168 Benchmark]: Boogie Preprocessor took 250.05 ms. Allocated memory was 143.7 MB in the beginning and 201.9 MB in the end (delta: 58.2 MB). Free memory was 90.1 MB in the beginning and 179.0 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:54,140 INFO L168 Benchmark]: RCFGBuilder took 572.59 ms. Allocated memory is still 201.9 MB. Free memory was 179.0 MB in the beginning and 158.8 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:54,141 INFO L168 Benchmark]: TraceAbstraction took 1452.13 ms. Allocated memory is still 201.9 MB. Free memory was 158.1 MB in the beginning and 97.1 MB in the end (delta: 61.0 MB). Peak memory consumption was 61.0 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:54,146 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37 ms. Allocated memory is still 143.7 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 340.65 ms. Allocated memory is still 143.7 MB. Free memory was 101.0 MB in the beginning and 90.1 MB in the end (delta: 10.9 MB). Peak memory consumption was 10.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 250.05 ms. Allocated memory was 143.7 MB in the beginning and 201.9 MB in the end (delta: 58.2 MB). Free memory was 90.1 MB in the beginning and 179.0 MB in the end (delta: -88.9 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 572.59 ms. Allocated memory is still 201.9 MB. Free memory was 179.0 MB in the beginning and 158.8 MB in the end (delta: 20.2 MB). Peak memory consumption was 20.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1452.13 ms. Allocated memory is still 201.9 MB. Free memory was 158.1 MB in the beginning and 97.1 MB in the end (delta: 61.0 MB). Peak memory consumption was 61.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=6, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L28] int *b = malloc(sizeof(int)*N); [L29] int *c = malloc(sizeof(int)*N); [L31] sum[0] = 0 [L32] i=0 VAL [\old(N)=0, a={-1:0}, b={-2:0}, c={-3:0}, i=0, malloc(sizeof(int)*N)={-3:0}, malloc(sizeof(int)*N)={-1:0}, malloc(sizeof(int)*N)={-2:0}, N=1, sum={2:0}] [L32] COND TRUE i