/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/sqmf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 11:39:13,154 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 11:39:13,157 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 11:39:13,172 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 11:39:13,173 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 11:39:13,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 11:39:13,176 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 11:39:13,178 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 11:39:13,180 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 11:39:13,181 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 11:39:13,182 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 11:39:13,184 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 11:39:13,184 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 11:39:13,186 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 11:39:13,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 11:39:13,189 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 11:39:13,190 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 11:39:13,191 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 11:39:13,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 11:39:13,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 11:39:13,201 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 11:39:13,202 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 11:39:13,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 11:39:13,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 11:39:13,211 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 11:39:13,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 11:39:13,211 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 11:39:13,212 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 11:39:13,213 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 11:39:13,214 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 11:39:13,214 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 11:39:13,215 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 11:39:13,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 11:39:13,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 11:39:13,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 11:39:13,219 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 11:39:13,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 11:39:13,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 11:39:13,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 11:39:13,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 11:39:13,222 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 11:39:13,223 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 11:39:13,239 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 11:39:13,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 11:39:13,241 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 11:39:13,241 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 11:39:13,242 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 11:39:13,242 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 11:39:13,242 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 11:39:13,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 11:39:13,243 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 11:39:13,243 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 11:39:13,243 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 11:39:13,243 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 11:39:13,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 11:39:13,244 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 11:39:13,244 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 11:39:13,244 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 11:39:13,244 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 11:39:13,245 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 11:39:13,245 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 11:39:13,245 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 11:39:13,245 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 11:39:13,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 11:39:13,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 11:39:13,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 11:39:13,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 11:39:13,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 11:39:13,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:13,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 11:39:13,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 11:39:13,247 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 -> NOT_INCREMENTALLY [2020-07-21 11:39:13,602 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 11:39:13,617 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 11:39:13,622 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 11:39:13,624 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 11:39:13,625 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 11:39:13,625 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sqmf.c [2020-07-21 11:39:13,705 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3004f8aec/42172f9fd4124ba59ee22494dbe628ec/FLAGb5304110b [2020-07-21 11:39:14,255 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 11:39:14,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/sqmf.c [2020-07-21 11:39:14,265 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3004f8aec/42172f9fd4124ba59ee22494dbe628ec/FLAGb5304110b [2020-07-21 11:39:14,566 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3004f8aec/42172f9fd4124ba59ee22494dbe628ec [2020-07-21 11:39:14,578 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 11:39:14,582 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 11:39:14,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 11:39:14,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 11:39:14,589 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 11:39:14,590 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:39:14" (1/1) ... [2020-07-21 11:39:14,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@778246e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:14, skipping insertion in model container [2020-07-21 11:39:14,593 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:39:14" (1/1) ... [2020-07-21 11:39:14,603 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 11:39:14,624 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 11:39:14,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:39:14,850 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 11:39:14,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 11:39:14,891 INFO L208 MainTranslator]: Completed translation [2020-07-21 11:39:14,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:14 WrapperNode [2020-07-21 11:39:14,892 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 11:39:14,893 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 11:39:14,893 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 11:39:14,894 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 11:39:15,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:14" (1/1) ... [2020-07-21 11:39:15,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:14" (1/1) ... [2020-07-21 11:39:15,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:14" (1/1) ... [2020-07-21 11:39:15,028 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:14" (1/1) ... [2020-07-21 11:39:15,037 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:14" (1/1) ... [2020-07-21 11:39:15,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:14" (1/1) ... [2020-07-21 11:39:15,044 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:14" (1/1) ... [2020-07-21 11:39:15,048 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 11:39:15,049 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 11:39:15,050 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 11:39:15,050 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 11:39:15,053 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:14" (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 11:39:15,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 11:39:15,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 11:39:15,140 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 11:39:15,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 11:39:15,140 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 11:39:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 11:39:15,140 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 11:39:15,141 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 11:39:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 11:39:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 11:39:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 11:39:15,142 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 11:39:15,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 11:39:15,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 11:39:15,143 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 11:39:15,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 11:39:15,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 11:39:15,144 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 11:39:15,505 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 11:39:15,505 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 11:39:15,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:39:15 BoogieIcfgContainer [2020-07-21 11:39:15,512 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 11:39:15,514 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 11:39:15,514 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 11:39:15,520 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 11:39:15,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:39:14" (1/3) ... [2020-07-21 11:39:15,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a00501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:39:15, skipping insertion in model container [2020-07-21 11:39:15,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:39:14" (2/3) ... [2020-07-21 11:39:15,524 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a00501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:39:15, skipping insertion in model container [2020-07-21 11:39:15,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:39:15" (3/3) ... [2020-07-21 11:39:15,526 INFO L109 eAbstractionObserver]: Analyzing ICFG sqmf.c [2020-07-21 11:39:15,543 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 11:39:15,553 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 11:39:15,571 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 11:39:15,600 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 11:39:15,601 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 11:39:15,601 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 11:39:15,601 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 11:39:15,601 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 11:39:15,602 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 11:39:15,602 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 11:39:15,602 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 11:39:15,623 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-07-21 11:39:15,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:39:15,630 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:15,632 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] [2020-07-21 11:39:15,633 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:15,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:15,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1314760119, now seen corresponding path program 1 times [2020-07-21 11:39:15,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:15,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [905899039] [2020-07-21 11:39:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:39:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-21 11:39:15,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 11:39:15,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 11:39:15,812 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 11:39:15,812 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 11:39:15,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [905899039] [2020-07-21 11:39:15,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 11:39:15,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 11:39:15,819 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087795625] [2020-07-21 11:39:15,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 11:39:15,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 11:39:15,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 11:39:15,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 11:39:15,846 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2020-07-21 11:39:15,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 11:39:15,878 INFO L93 Difference]: Finished difference Result 58 states and 73 transitions. [2020-07-21 11:39:15,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 11:39:15,880 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-21 11:39:15,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 11:39:15,892 INFO L225 Difference]: With dead ends: 58 [2020-07-21 11:39:15,893 INFO L226 Difference]: Without dead ends: 29 [2020-07-21 11:39:15,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 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 11:39:15,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-07-21 11:39:15,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-07-21 11:39:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 11:39:15,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-07-21 11:39:15,943 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 22 [2020-07-21 11:39:15,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 11:39:15,944 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-07-21 11:39:15,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 11:39:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-07-21 11:39:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 11:39:15,946 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 11:39:15,946 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] [2020-07-21 11:39:16,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:16,157 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 11:39:16,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 11:39:16,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1901566133, now seen corresponding path program 1 times [2020-07-21 11:39:16,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 11:39:16,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034236348] [2020-07-21 11:39:16,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:39:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:39:16,267 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:39:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 11:39:16,291 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 11:39:16,321 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 11:39:16,322 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 11:39:16,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 11:39:16,587 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:39:16 BoogieIcfgContainer [2020-07-21 11:39:16,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 11:39:16,592 INFO L168 Benchmark]: Toolchain (without parser) took 2009.94 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 101.5 MB in the beginning and 125.5 MB in the end (delta: -24.0 MB). Peak memory consumption was 33.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:16,593 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-21 11:39:16,595 INFO L168 Benchmark]: CACSL2BoogieTranslator took 309.34 ms. Allocated memory is still 144.7 MB. Free memory was 101.1 MB in the beginning and 90.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:16,596 INFO L168 Benchmark]: Boogie Preprocessor took 155.19 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 90.4 MB in the beginning and 180.5 MB in the end (delta: -90.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:16,601 INFO L168 Benchmark]: RCFGBuilder took 463.42 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 163.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:16,602 INFO L168 Benchmark]: TraceAbstraction took 1073.79 ms. Allocated memory is still 202.4 MB. Free memory was 162.5 MB in the beginning and 125.5 MB in the end (delta: 36.9 MB). Peak memory consumption was 36.9 MB. Max. memory is 7.1 GB. [2020-07-21 11:39:16,607 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 144.7 MB. Free memory was 119.6 MB in the beginning and 119.3 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 309.34 ms. Allocated memory is still 144.7 MB. Free memory was 101.1 MB in the beginning and 90.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 155.19 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 90.4 MB in the beginning and 180.5 MB in the end (delta: -90.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 463.42 ms. Allocated memory is still 202.4 MB. Free memory was 180.5 MB in the beginning and 163.2 MB in the end (delta: 17.3 MB). Peak memory consumption was 17.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1073.79 ms. Allocated memory is still 202.4 MB. Free memory was 162.5 MB in the beginning and 125.5 MB in the end (delta: 36.9 MB). Peak memory consumption was 36.9 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); [L27] long long *b = malloc(sizeof(long long)*N); [L29] b[0] = 0 [L30] a[0] = 0 [L32] i=1 VAL [\old(N)=0, a={-1:0}, b={-2:0}, i=1, malloc(sizeof(long long)*N)={-2:0}, malloc(sizeof(long long)*N)={-1:0}, N=1] [L32] COND FALSE !(i