/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_FUNCTIONS --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/s4iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 14:00:34,223 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 14:00:34,225 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 14:00:34,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 14:00:34,246 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 14:00:34,248 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 14:00:34,250 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 14:00:34,260 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 14:00:34,265 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 14:00:34,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 14:00:34,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 14:00:34,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 14:00:34,272 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 14:00:34,274 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 14:00:34,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 14:00:34,278 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 14:00:34,281 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 14:00:34,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 14:00:34,283 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 14:00:34,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 14:00:34,295 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 14:00:34,299 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 14:00:34,301 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 14:00:34,301 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 14:00:34,303 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 14:00:34,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 14:00:34,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 14:00:34,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 14:00:34,305 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 14:00:34,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 14:00:34,306 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 14:00:34,307 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 14:00:34,307 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 14:00:34,308 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 14:00:34,309 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 14:00:34,309 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 14:00:34,310 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 14:00:34,310 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 14:00:34,310 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 14:00:34,311 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 14:00:34,312 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 14:00:34,312 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 14:00:34,327 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 14:00:34,327 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 14:00:34,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 14:00:34,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 14:00:34,329 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 14:00:34,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 14:00:34,329 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 14:00:34,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 14:00:34,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 14:00:34,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 14:00:34,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 14:00:34,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 14:00:34,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 14:00:34,330 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 14:00:34,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 14:00:34,331 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 14:00:34,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 14:00:34,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 14:00:34,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 14:00:34,332 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 14:00:34,332 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 14:00:34,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 14:00:34,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 14:00:34,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 14:00:34,333 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 14:00:34,333 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 14:00:34,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:34,333 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 14:00:34,333 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 14:00:34,334 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_FUNCTIONS 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 14:00:34,698 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 14:00:34,714 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 14:00:34,718 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 14:00:34,719 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 14:00:34,720 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 14:00:34,720 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s4iff.c [2020-07-21 14:00:34,791 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af420d7d6/55d5589698dc4f38abf7c237c4c2c595/FLAGdc7b6f766 [2020-07-21 14:00:35,275 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 14:00:35,276 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s4iff.c [2020-07-21 14:00:35,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af420d7d6/55d5589698dc4f38abf7c237c4c2c595/FLAGdc7b6f766 [2020-07-21 14:00:35,692 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af420d7d6/55d5589698dc4f38abf7c237c4c2c595 [2020-07-21 14:00:35,702 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 14:00:35,706 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 14:00:35,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 14:00:35,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 14:00:35,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 14:00:35,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:00:35" (1/1) ... [2020-07-21 14:00:35,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64324cae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:35, skipping insertion in model container [2020-07-21 14:00:35,715 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 02:00:35" (1/1) ... [2020-07-21 14:00:35,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 14:00:35,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 14:00:35,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:00:35,941 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 14:00:35,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 14:00:35,978 INFO L208 MainTranslator]: Completed translation [2020-07-21 14:00:35,978 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:35 WrapperNode [2020-07-21 14:00:35,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 14:00:35,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 14:00:35,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 14:00:35,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 14:00:36,076 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:35" (1/1) ... [2020-07-21 14:00:36,076 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:35" (1/1) ... [2020-07-21 14:00:36,084 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:35" (1/1) ... [2020-07-21 14:00:36,085 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:35" (1/1) ... [2020-07-21 14:00:36,093 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:35" (1/1) ... [2020-07-21 14:00:36,099 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:35" (1/1) ... [2020-07-21 14:00:36,101 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:35" (1/1) ... [2020-07-21 14:00:36,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 14:00:36,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 14:00:36,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 14:00:36,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 14:00:36,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:35" (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 14:00:36,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 14:00:36,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 14:00:36,175 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 14:00:36,176 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 14:00:36,176 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 14:00:36,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 14:00:36,177 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 14:00:36,178 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 14:00:36,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 14:00:36,179 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 14:00:36,180 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 14:00:36,180 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 14:00:36,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 14:00:36,180 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 14:00:36,180 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 14:00:36,181 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 14:00:36,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 14:00:36,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 14:00:36,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 14:00:36,538 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 14:00:36,538 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 14:00:36,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:00:36 BoogieIcfgContainer [2020-07-21 14:00:36,543 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 14:00:36,544 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 14:00:36,544 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 14:00:36,547 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 14:00:36,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 02:00:35" (1/3) ... [2020-07-21 14:00:36,548 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7afb7970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:00:36, skipping insertion in model container [2020-07-21 14:00:36,548 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 02:00:35" (2/3) ... [2020-07-21 14:00:36,549 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7afb7970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 02:00:36, skipping insertion in model container [2020-07-21 14:00:36,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 02:00:36" (3/3) ... [2020-07-21 14:00:36,551 INFO L109 eAbstractionObserver]: Analyzing ICFG s4iff.c [2020-07-21 14:00:36,562 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 14:00:36,571 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 14:00:36,586 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 14:00:36,610 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 14:00:36,610 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 14:00:36,610 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 14:00:36,610 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 14:00:36,611 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 14:00:36,611 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 14:00:36,611 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 14:00:36,611 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 14:00:36,629 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-21 14:00:36,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 14:00:36,636 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:00:36,637 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 14:00:36,637 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:00:36,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:00:36,643 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-21 14:00:36,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:00:36,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210237408] [2020-07-21 14:00:36,651 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 14:00:36,757 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 14:00:36,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:00:36,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 14:00:36,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:00:36,835 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 14:00:36,835 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 14:00:36,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210237408] [2020-07-21 14:00:36,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 14:00:36,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 14:00:36,839 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592770059] [2020-07-21 14:00:36,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 14:00:36,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:00:36,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 14:00:36,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 14:00:36,859 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 4 states. [2020-07-21 14:00:36,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:00:36,978 INFO L93 Difference]: Finished difference Result 63 states and 80 transitions. [2020-07-21 14:00:36,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 14:00:36,980 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 14:00:36,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:00:36,990 INFO L225 Difference]: With dead ends: 63 [2020-07-21 14:00:36,991 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 14:00:36,995 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 14:00:37,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 14:00:37,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-21 14:00:37,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-21 14:00:37,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-21 14:00:37,036 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-21 14:00:37,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:00:37,036 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-21 14:00:37,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 14:00:37,037 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-21 14:00:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-21 14:00:37,038 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:00:37,038 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 14:00:37,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:37,248 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:00:37,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:00:37,249 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-21 14:00:37,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:00:37,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545987339] [2020-07-21 14:00:37,251 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 14:00:37,314 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:00:37,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:00:37,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-21 14:00:37,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:00:37,383 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 14:00:37,384 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 14:00:37,399 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 14:00:37,399 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 14:00:37,400 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:16 [2020-07-21 14:00:37,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 14:00:37,431 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-07-21 14:00:37,432 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 14:00:37,445 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 14:00:37,446 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 14:00:37,446 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:27 [2020-07-21 14:00:37,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 14:00:37,648 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 14:00:37,649 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2020-07-21 14:00:37,651 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 14:00:37,712 INFO L624 ElimStorePlain]: treesize reduction 35, result has 52.1 percent of original size [2020-07-21 14:00:37,722 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-21 14:00:37,723 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:74, output treesize:35 [2020-07-21 14:00:37,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-07-21 14:00:37,821 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2020-07-21 14:00:37,823 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 14:00:37,835 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 14:00:37,837 INFO L544 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 14:00:37,837 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:42, output treesize:10 [2020-07-21 14:00:37,867 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-07-21 14:00:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:00:37,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:00:37,985 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:00:38,269 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:00:40,392 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_prenex_2 Int) (v_main_~i~0_17 Int)) (let ((.cse1 (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) v_prenex_2) 4))) (let ((.cse0 (select .cse1 (+ (* v_main_~i~0_17 4) v_prenex_2)))) (or (not (= 4 .cse0)) (< c_main_~i~0 (div (+ .cse0 (select (select (store |c_#memory_int| c_main_~a~0.base .cse1) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|)) 5)) (< v_main_~i~0_17 0) (< c_main_~i~0 v_main_~i~0_17))))) (forall ((v_prenex_1 Int) (main_~a~0.offset Int)) (let ((.cse3 (store (select |c_#memory_int| c_main_~a~0.base) (+ (* c_main_~i~0 4) main_~a~0.offset) 4))) (let ((.cse2 (select .cse3 (+ (* v_prenex_1 4) main_~a~0.offset)))) (or (< c_main_~i~0 v_prenex_1) (< v_prenex_1 0) (not (= 4 .cse2)) (< (div (+ .cse2 (select (select (store |c_#memory_int| c_main_~a~0.base .cse3) |c_main_~#sum~0.base|) |c_main_~#sum~0.offset|) (- 1)) 5) (+ v_prenex_1 1))))))) is different from false [2020-07-21 14:00:40,420 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-21 14:00:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2020-07-21 14:00:40,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545987339] [2020-07-21 14:00:40,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:00:40,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2020-07-21 14:00:40,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115346322] [2020-07-21 14:00:40,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-21 14:00:40,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:00:40,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-21 14:00:40,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=284, Unknown=1, NotChecked=34, Total=380 [2020-07-21 14:00:40,477 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 20 states. [2020-07-21 14:00:42,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:00:42,098 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-07-21 14:00:42,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-21 14:00:42,099 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 26 [2020-07-21 14:00:42,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:00:42,103 INFO L225 Difference]: With dead ends: 51 [2020-07-21 14:00:42,103 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 14:00:42,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=101, Invalid=502, Unknown=1, NotChecked=46, Total=650 [2020-07-21 14:00:42,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 14:00:42,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2020-07-21 14:00:42,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-21 14:00:42,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-07-21 14:00:42,113 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 26 [2020-07-21 14:00:42,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:00:42,114 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-07-21 14:00:42,114 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-21 14:00:42,114 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-07-21 14:00:42,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-07-21 14:00:42,126 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:00:42,127 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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 14:00:42,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:42,341 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:00:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:00:42,342 INFO L82 PathProgramCache]: Analyzing trace with hash 531279049, now seen corresponding path program 2 times [2020-07-21 14:00:42,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:00:42,343 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758129531] [2020-07-21 14:00:42,343 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 14:00:42,391 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:00:42,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:00:42,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:00:42,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:00:42,430 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:00:42,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:00:42,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:00:42,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758129531] [2020-07-21 14:00:42,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:00:42,468 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 14:00:42,468 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732195870] [2020-07-21 14:00:42,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 14:00:42,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:00:42,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 14:00:42,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:00:42,471 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 9 states. [2020-07-21 14:00:42,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:00:42,670 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-07-21 14:00:42,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-21 14:00:42,671 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-07-21 14:00:42,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:00:42,672 INFO L225 Difference]: With dead ends: 45 [2020-07-21 14:00:42,672 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 14:00:42,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-07-21 14:00:42,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 14:00:42,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-07-21 14:00:42,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 14:00:42,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 14:00:42,681 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-07-21 14:00:42,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:00:42,682 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 14:00:42,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 14:00:42,682 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 14:00:42,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-07-21 14:00:42,683 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:00:42,683 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 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 14:00:42,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:42,898 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:00:42,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:00:42,899 INFO L82 PathProgramCache]: Analyzing trace with hash -1018004383, now seen corresponding path program 3 times [2020-07-21 14:00:42,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:00:42,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706626896] [2020-07-21 14:00:42,901 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 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:42,942 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:00:42,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 14:00:42,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 14:00:42,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 14:00:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:00:42,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 14:00:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 14:00:43,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706626896] [2020-07-21 14:00:43,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 14:00:43,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 14:00:43,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630168001] [2020-07-21 14:00:43,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 14:00:43,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 14:00:43,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 14:00:43,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 14:00:43,039 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2020-07-21 14:00:43,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 14:00:43,188 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2020-07-21 14:00:43,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 14:00:43,189 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 29 [2020-07-21 14:00:43,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 14:00:43,190 INFO L225 Difference]: With dead ends: 49 [2020-07-21 14:00:43,191 INFO L226 Difference]: Without dead ends: 35 [2020-07-21 14:00:43,192 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 14:00:43,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-07-21 14:00:43,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-07-21 14:00:43,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 14:00:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 14:00:43,200 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 29 [2020-07-21 14:00:43,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 14:00:43,200 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 14:00:43,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 14:00:43,200 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 14:00:43,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-21 14:00:43,202 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 14:00:43,202 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-21 14:00:43,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:43,416 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 14:00:43,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 14:00:43,417 INFO L82 PathProgramCache]: Analyzing trace with hash 2056219107, now seen corresponding path program 4 times [2020-07-21 14:00:43,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 14:00:43,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990865108] [2020-07-21 14:00:43,419 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 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:43,469 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 14:00:43,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 14:00:43,469 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 14:00:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 14:00:43,489 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 14:00:43,513 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 14:00:43,513 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 14:00:43,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 14:00:43,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 02:00:43 BoogieIcfgContainer [2020-07-21 14:00:43,764 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 14:00:43,766 INFO L168 Benchmark]: Toolchain (without parser) took 8061.90 ms. Allocated memory was 137.9 MB in the beginning and 248.0 MB in the end (delta: 110.1 MB). Free memory was 103.0 MB in the beginning and 117.7 MB in the end (delta: -14.7 MB). Peak memory consumption was 95.4 MB. Max. memory is 7.1 GB. [2020-07-21 14:00:43,766 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory is still 120.6 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 14:00:43,767 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.21 ms. Allocated memory is still 137.9 MB. Free memory was 102.6 MB in the beginning and 92.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 14:00:43,768 INFO L168 Benchmark]: Boogie Preprocessor took 124.52 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.1 MB in the beginning and 178.6 MB in the end (delta: -86.5 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-07-21 14:00:43,769 INFO L168 Benchmark]: RCFGBuilder took 438.48 ms. Allocated memory is still 201.9 MB. Free memory was 178.6 MB in the beginning and 161.9 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-07-21 14:00:43,769 INFO L168 Benchmark]: TraceAbstraction took 7220.17 ms. Allocated memory was 201.9 MB in the beginning and 248.0 MB in the end (delta: 46.1 MB). Free memory was 160.9 MB in the beginning and 117.7 MB in the end (delta: 43.3 MB). Peak memory consumption was 89.4 MB. Max. memory is 7.1 GB. [2020-07-21 14:00:43,773 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 137.9 MB. Free memory is still 120.6 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 272.21 ms. Allocated memory is still 137.9 MB. Free memory was 102.6 MB in the beginning and 92.1 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 124.52 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.1 MB in the beginning and 178.6 MB in the end (delta: -86.5 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 438.48 ms. Allocated memory is still 201.9 MB. Free memory was 178.6 MB in the beginning and 161.9 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 7220.17 ms. Allocated memory was 201.9 MB in the beginning and 248.0 MB in the end (delta: 46.1 MB). Free memory was 160.9 MB in the beginning and 117.7 MB in the end (delta: 43.3 MB). Peak memory consumption was 89.4 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)=7, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] sum[0] = 1 [L30] i=0 VAL [\old(N)=0, a={28101:0}, i=0, malloc(sizeof(int)*N)={28101:0}, N=2, sum={28103:0}] [L30] COND TRUE i