/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 BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/ms2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 01:39:54,784 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:39:54,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:39:54,813 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:39:54,814 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:39:54,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:39:54,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:39:54,836 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:39:54,839 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:39:54,841 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:39:54,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:39:54,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:39:54,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:39:54,849 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:39:54,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:39:54,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:39:54,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:39:54,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:39:54,863 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:39:54,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:39:54,877 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:39:54,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:39:54,882 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:39:54,883 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:39:54,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:39:54,896 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 01:39:54,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 01:39:54,899 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 01:39:54,900 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 01:39:54,901 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 01:39:54,902 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 01:39:54,902 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 01:39:54,903 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 01:39:54,903 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:39:54,904 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:39:54,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:39:54,907 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 01:39:54,938 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:39:54,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:39:54,942 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:39:54,943 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:39:54,944 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:39:54,944 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:39:54,944 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:39:54,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:39:54,945 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:39:54,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:39:54,947 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:39:54,947 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:39:54,948 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:39:54,948 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:39:54,948 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:39:54,949 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:39:54,949 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:39:54,949 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:39:54,949 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:39:54,950 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:39:54,950 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:39:54,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:39:54,950 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:39:54,950 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:39:54,951 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:39:54,951 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:39:54,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:39:54,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:39:54,951 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:39:54,952 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 -> BIGGEST_EQUIVALENCE_CLASS 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 -> 4 [2020-07-21 01:39:55,300 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:39:55,325 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:39:55,329 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:39:55,331 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:39:55,334 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:39:55,335 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms2f.c [2020-07-21 01:39:55,410 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88a895bf2/8c4b377a87694c88904d6a304156095b/FLAG1e0fb9e74 [2020-07-21 01:39:55,942 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:39:55,943 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ms2f.c [2020-07-21 01:39:55,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88a895bf2/8c4b377a87694c88904d6a304156095b/FLAG1e0fb9e74 [2020-07-21 01:39:56,256 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/88a895bf2/8c4b377a87694c88904d6a304156095b [2020-07-21 01:39:56,270 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:39:56,274 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:39:56,275 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:39:56,275 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:39:56,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:39:56,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:39:56" (1/1) ... [2020-07-21 01:39:56,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45ac8064 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:56, skipping insertion in model container [2020-07-21 01:39:56,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:39:56" (1/1) ... [2020-07-21 01:39:56,293 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:39:56,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:39:56,510 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:39:56,521 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:39:56,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:39:56,564 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:39:56,565 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:56 WrapperNode [2020-07-21 01:39:56,565 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:39:56,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:39:56,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:39:56,566 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:39:56,674 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:56" (1/1) ... [2020-07-21 01:39:56,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:56" (1/1) ... [2020-07-21 01:39:56,684 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:56" (1/1) ... [2020-07-21 01:39:56,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:56" (1/1) ... [2020-07-21 01:39:56,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:56" (1/1) ... [2020-07-21 01:39:56,720 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:56" (1/1) ... [2020-07-21 01:39:56,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:56" (1/1) ... [2020-07-21 01:39:56,724 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:39:56,725 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:39:56,725 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:39:56,725 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:39:56,727 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:56" (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 01:39:56,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:39:56,795 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:39:56,795 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:39:56,795 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:39:56,795 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:39:56,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:39:56,796 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:39:56,796 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:39:56,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:39:56,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:39:56,796 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 01:39:56,797 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:39:56,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 01:39:56,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 01:39:56,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:39:56,797 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:39:56,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:39:56,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:39:56,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:39:57,108 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:39:57,109 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 01:39:57,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:39:57 BoogieIcfgContainer [2020-07-21 01:39:57,118 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:39:57,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:39:57,121 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:39:57,128 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:39:57,128 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:39:56" (1/3) ... [2020-07-21 01:39:57,130 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbcca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:39:57, skipping insertion in model container [2020-07-21 01:39:57,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:39:56" (2/3) ... [2020-07-21 01:39:57,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fbcca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:39:57, skipping insertion in model container [2020-07-21 01:39:57,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:39:57" (3/3) ... [2020-07-21 01:39:57,135 INFO L109 eAbstractionObserver]: Analyzing ICFG ms2f.c [2020-07-21 01:39:57,153 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:39:57,162 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:39:57,183 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:39:57,220 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:39:57,220 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:39:57,220 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:39:57,221 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:39:57,221 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:39:57,221 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:39:57,221 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:39:57,221 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:39:57,244 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 01:39:57,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 01:39:57,252 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:39:57,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:39:57,254 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:39:57,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:39:57,261 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-21 01:39:57,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:39:57,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102547858] [2020-07-21 01:39:57,274 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 01:39:57,386 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:39:57,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:39:57,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:39:57,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:39:57,421 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 01:39:57,421 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:39:57,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102547858] [2020-07-21 01:39:57,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:39:57,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:39:57,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87513146] [2020-07-21 01:39:57,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:39:57,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:39:57,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:39:57,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:39:57,451 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-07-21 01:39:57,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:39:57,477 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-21 01:39:57,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:39:57,479 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-21 01:39:57,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:39:57,488 INFO L225 Difference]: With dead ends: 54 [2020-07-21 01:39:57,488 INFO L226 Difference]: Without dead ends: 25 [2020-07-21 01:39:57,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:39:57,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-21 01:39:57,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-21 01:39:57,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-21 01:39:57,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-21 01:39:57,534 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-21 01:39:57,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:39:57,535 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-21 01:39:57,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:39:57,535 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-21 01:39:57,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 01:39:57,537 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:39:57,537 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 01:39:57,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:39:57,754 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:39:57,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:39:57,755 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-21 01:39:57,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:39:57,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383316906] [2020-07-21 01:39:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 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 01:39:57,827 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:39:57,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:39:57,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:39:57,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:39:57,885 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 01:39:57,886 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:39:57,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383316906] [2020-07-21 01:39:57,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:39:57,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:39:57,887 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690591084] [2020-07-21 01:39:57,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:39:57,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:39:57,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:39:57,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:39:57,891 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 4 states. [2020-07-21 01:39:57,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:39:57,981 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-21 01:39:57,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:39:57,982 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 01:39:57,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:39:57,984 INFO L225 Difference]: With dead ends: 40 [2020-07-21 01:39:57,984 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 01:39:57,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 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 01:39:57,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 01:39:57,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-21 01:39:57,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 01:39:57,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-21 01:39:57,997 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-21 01:39:57,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:39:57,998 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-21 01:39:57,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:39:57,998 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-21 01:39:57,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 01:39:57,999 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:39:58,000 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] [2020-07-21 01:39:58,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:39:58,213 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:39:58,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:39:58,214 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-21 01:39:58,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:39:58,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1940218788] [2020-07-21 01:39:58,215 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:39:58,327 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:39:58,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:39:58,328 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:39:58,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:39:58,360 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:39:58,434 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:39:58,434 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:39:58,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:39:58,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:39:58 BoogieIcfgContainer [2020-07-21 01:39:58,698 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:39:58,703 INFO L168 Benchmark]: Toolchain (without parser) took 2428.36 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 102.0 MB in the beginning and 104.8 MB in the end (delta: -2.8 MB). Peak memory consumption was 54.9 MB. Max. memory is 7.1 GB. [2020-07-21 01:39:58,703 INFO L168 Benchmark]: CDTParser took 1.11 ms. Allocated memory is still 144.2 MB. Free memory is still 120.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 01:39:58,705 INFO L168 Benchmark]: CACSL2BoogieTranslator took 290.54 ms. Allocated memory is still 144.2 MB. Free memory was 101.6 MB in the beginning and 91.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:39:58,706 INFO L168 Benchmark]: Boogie Preprocessor took 158.47 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 91.2 MB in the beginning and 179.2 MB in the end (delta: -87.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 01:39:58,707 INFO L168 Benchmark]: RCFGBuilder took 393.54 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 162.5 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. [2020-07-21 01:39:58,708 INFO L168 Benchmark]: TraceAbstraction took 1577.40 ms. Allocated memory is still 201.9 MB. Free memory was 162.5 MB in the beginning and 104.8 MB in the end (delta: 57.7 MB). Peak memory consumption was 57.7 MB. Max. memory is 7.1 GB. [2020-07-21 01:39:58,712 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.11 ms. Allocated memory is still 144.2 MB. Free memory is still 120.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 290.54 ms. Allocated memory is still 144.2 MB. Free memory was 101.6 MB in the beginning and 91.2 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 158.47 ms. Allocated memory was 144.2 MB in the beginning and 201.9 MB in the end (delta: 57.7 MB). Free memory was 91.2 MB in the beginning and 179.2 MB in the end (delta: -87.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 393.54 ms. Allocated memory is still 201.9 MB. Free memory was 179.2 MB in the beginning and 162.5 MB in the end (delta: 16.6 MB). Peak memory consumption was 16.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1577.40 ms. Allocated memory is still 201.9 MB. Free memory was 162.5 MB in the beginning and 104.8 MB in the end (delta: 57.7 MB). Peak memory consumption was 57.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=5, 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] int sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L29] COND TRUE i N) VAL [\old(cond)=0, \old(N)=0, N=1] [L13] COND TRUE !(cond) VAL [\old(cond)=0, \old(N)=0, cond=0, N=1] [L13] __VERIFIER_error() VAL [\old(cond)=0, \old(N)=0, cond=0, N=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.4s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 17 SDslu, 15 SDs, 0 SdLazy, 24 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred 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, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 68 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 1160 SizeOfPredicates, 2 NumberOfNonLiveVariables, 134 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 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...