/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 NUM_VARIABLES --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/indp4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 16:42:02,996 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 16:42:02,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 16:42:03,017 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 16:42:03,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 16:42:03,019 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 16:42:03,021 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 16:42:03,030 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 16:42:03,035 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 16:42:03,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 16:42:03,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 16:42:03,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 16:42:03,041 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 16:42:03,042 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 16:42:03,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 16:42:03,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 16:42:03,046 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 16:42:03,047 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 16:42:03,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 16:42:03,055 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 16:42:03,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 16:42:03,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 16:42:03,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 16:42:03,059 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 16:42:03,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 16:42:03,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 16:42:03,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 16:42:03,062 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 16:42:03,062 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 16:42:03,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 16:42:03,063 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 16:42:03,064 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 16:42:03,065 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 16:42:03,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 16:42:03,066 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 16:42:03,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 16:42:03,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 16:42:03,067 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 16:42:03,068 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 16:42:03,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 16:42:03,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 16:42:03,070 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 16:42:03,083 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 16:42:03,084 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 16:42:03,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 16:42:03,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 16:42:03,085 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 16:42:03,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 16:42:03,086 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 16:42:03,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 16:42:03,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 16:42:03,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 16:42:03,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 16:42:03,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 16:42:03,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 16:42:03,087 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 16:42:03,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 16:42:03,087 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 16:42:03,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 16:42:03,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 16:42:03,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 16:42:03,088 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 16:42:03,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 16:42:03,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 16:42:03,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 16:42:03,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 16:42:03,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 16:42:03,089 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 16:42:03,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:03,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 16:42:03,090 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 16:42:03,090 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 -> NUM_VARIABLES 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 16:42:03,363 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 16:42:03,377 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 16:42:03,380 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 16:42:03,382 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 16:42:03,382 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 16:42:03,383 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/indp4f.c [2020-07-21 16:42:03,464 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdc61178c/8579b363104e46908f27d5dc168b6216/FLAGf12797059 [2020-07-21 16:42:03,946 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 16:42:03,947 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/indp4f.c [2020-07-21 16:42:03,954 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdc61178c/8579b363104e46908f27d5dc168b6216/FLAGf12797059 [2020-07-21 16:42:04,366 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fdc61178c/8579b363104e46908f27d5dc168b6216 [2020-07-21 16:42:04,375 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 16:42:04,378 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 16:42:04,379 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 16:42:04,379 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 16:42:04,383 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 16:42:04,384 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:42:04" (1/1) ... [2020-07-21 16:42:04,386 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b9b76d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:04, skipping insertion in model container [2020-07-21 16:42:04,387 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 04:42:04" (1/1) ... [2020-07-21 16:42:04,392 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 16:42:04,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 16:42:04,621 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:42:04,630 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 16:42:04,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 16:42:04,666 INFO L208 MainTranslator]: Completed translation [2020-07-21 16:42:04,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:04 WrapperNode [2020-07-21 16:42:04,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 16:42:04,667 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 16:42:04,668 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 16:42:04,668 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 16:42:04,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:04" (1/1) ... [2020-07-21 16:42:04,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:04" (1/1) ... [2020-07-21 16:42:04,771 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:04" (1/1) ... [2020-07-21 16:42:04,772 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:04" (1/1) ... [2020-07-21 16:42:04,778 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:04" (1/1) ... [2020-07-21 16:42:04,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:04" (1/1) ... [2020-07-21 16:42:04,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:04" (1/1) ... [2020-07-21 16:42:04,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 16:42:04,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 16:42:04,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 16:42:04,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 16:42:04,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:04" (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 16:42:04,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 16:42:04,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 16:42:04,844 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 16:42:04,844 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 16:42:04,845 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 16:42:04,845 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 16:42:04,845 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 16:42:04,846 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 16:42:04,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 16:42:04,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 16:42:04,846 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 16:42:04,846 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 16:42:04,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 16:42:04,847 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 16:42:04,847 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 16:42:04,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 16:42:04,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 16:42:04,847 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 16:42:05,163 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 16:42:05,164 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-07-21 16:42:05,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:42:05 BoogieIcfgContainer [2020-07-21 16:42:05,168 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 16:42:05,177 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 16:42:05,177 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 16:42:05,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 16:42:05,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 04:42:04" (1/3) ... [2020-07-21 16:42:05,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9ca0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:42:05, skipping insertion in model container [2020-07-21 16:42:05,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 04:42:04" (2/3) ... [2020-07-21 16:42:05,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d9ca0a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 04:42:05, skipping insertion in model container [2020-07-21 16:42:05,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 04:42:05" (3/3) ... [2020-07-21 16:42:05,185 INFO L109 eAbstractionObserver]: Analyzing ICFG indp4f.c [2020-07-21 16:42:05,195 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 16:42:05,202 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 16:42:05,215 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 16:42:05,236 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 16:42:05,237 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 16:42:05,237 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 16:42:05,237 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 16:42:05,237 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 16:42:05,237 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 16:42:05,237 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 16:42:05,237 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 16:42:05,263 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-07-21 16:42:05,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 16:42:05,271 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:42:05,272 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] [2020-07-21 16:42:05,272 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:42:05,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:42:05,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1155719453, now seen corresponding path program 1 times [2020-07-21 16:42:05,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:42:05,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347150789] [2020-07-21 16:42:05,289 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 16:42:05,398 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:42:05,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:42:05,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 16:42:05,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:42:05,428 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 16:42:05,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:42:05,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347150789] [2020-07-21 16:42:05,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:42:05,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 16:42:05,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233662470] [2020-07-21 16:42:05,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 16:42:05,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:42:05,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 16:42:05,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 16:42:05,453 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2020-07-21 16:42:05,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:42:05,474 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2020-07-21 16:42:05,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 16:42:05,475 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 24 [2020-07-21 16:42:05,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:42:05,483 INFO L225 Difference]: With dead ends: 64 [2020-07-21 16:42:05,484 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 16:42:05,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 23 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 16:42:05,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 16:42:05,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-07-21 16:42:05,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 16:42:05,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 16:42:05,521 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 24 [2020-07-21 16:42:05,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:42:05,522 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 16:42:05,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 16:42:05,522 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 16:42:05,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 16:42:05,523 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:42:05,524 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] [2020-07-21 16:42:05,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:05,730 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:42:05,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:42:05,732 INFO L82 PathProgramCache]: Analyzing trace with hash -124144225, now seen corresponding path program 1 times [2020-07-21 16:42:05,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:42:05,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808360735] [2020-07-21 16:42:05,734 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 16:42:05,805 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:42:05,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 16:42:05,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 16:42:05,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 16:42:05,849 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 16:42:05,850 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 16:42:05,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808360735] [2020-07-21 16:42:05,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 16:42:05,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 16:42:05,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054590371] [2020-07-21 16:42:05,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 16:42:05,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 16:42:05,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 16:42:05,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 16:42:05,854 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 4 states. [2020-07-21 16:42:05,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 16:42:05,952 INFO L93 Difference]: Finished difference Result 59 states and 68 transitions. [2020-07-21 16:42:05,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 16:42:05,953 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2020-07-21 16:42:05,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 16:42:05,956 INFO L225 Difference]: With dead ends: 59 [2020-07-21 16:42:05,956 INFO L226 Difference]: Without dead ends: 42 [2020-07-21 16:42:05,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 21 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 16:42:05,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-21 16:42:05,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-07-21 16:42:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 16:42:05,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-07-21 16:42:05,970 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 24 [2020-07-21 16:42:05,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 16:42:05,970 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-07-21 16:42:05,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 16:42:05,971 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-07-21 16:42:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 16:42:05,972 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 16:42:05,972 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] [2020-07-21 16:42:06,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:06,186 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 16:42:06,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 16:42:06,187 INFO L82 PathProgramCache]: Analyzing trace with hash -191015719, now seen corresponding path program 1 times [2020-07-21 16:42:06,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 16:42:06,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740447463] [2020-07-21 16:42:06,189 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 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 16:42:06,259 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 16:42:06,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 16:42:06,260 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:42:06,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 16:42:06,282 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 16:42:06,306 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 16:42:06,306 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 16:42:06,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 16:42:06,559 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 04:42:06 BoogieIcfgContainer [2020-07-21 16:42:06,559 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 16:42:06,562 INFO L168 Benchmark]: Toolchain (without parser) took 2184.10 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 102.6 MB in the beginning and 102.5 MB in the end (delta: 87.1 kB). Peak memory consumption was 56.7 MB. Max. memory is 7.1 GB. [2020-07-21 16:42:06,563 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-21 16:42:06,564 INFO L168 Benchmark]: CACSL2BoogieTranslator took 288.15 ms. Allocated memory is still 146.3 MB. Free memory was 102.2 MB in the beginning and 91.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-21 16:42:06,566 INFO L168 Benchmark]: Boogie Preprocessor took 123.98 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 91.4 MB in the beginning and 180.5 MB in the end (delta: -89.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-21 16:42:06,567 INFO L168 Benchmark]: RCFGBuilder took 376.78 ms. Allocated memory is still 202.9 MB. Free memory was 180.5 MB in the beginning and 163.0 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. [2020-07-21 16:42:06,568 INFO L168 Benchmark]: TraceAbstraction took 1382.33 ms. Allocated memory is still 202.9 MB. Free memory was 162.3 MB in the beginning and 102.5 MB in the end (delta: 59.8 MB). Peak memory consumption was 59.8 MB. Max. memory is 7.1 GB. [2020-07-21 16:42:06,572 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 146.3 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 288.15 ms. Allocated memory is still 146.3 MB. Free memory was 102.2 MB in the beginning and 91.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.98 ms. Allocated memory was 146.3 MB in the beginning and 202.9 MB in the end (delta: 56.6 MB). Free memory was 91.4 MB in the beginning and 180.5 MB in the end (delta: -89.0 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 376.78 ms. Allocated memory is still 202.9 MB. Free memory was 180.5 MB in the beginning and 163.0 MB in the end (delta: 17.5 MB). Peak memory consumption was 17.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1382.33 ms. Allocated memory is still 202.9 MB. Free memory was 162.3 MB in the beginning and 102.5 MB in the end (delta: 59.8 MB). Peak memory consumption was 59.8 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)=2, 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 *a = malloc(sizeof(long long)*N); [L28] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(long long)*N)={-1:0}, N=1] [L28] COND TRUE i