/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/condnf.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 23:08:42,313 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 23:08:42,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 23:08:42,331 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 23:08:42,331 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 23:08:42,333 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 23:08:42,334 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 23:08:42,336 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 23:08:42,338 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 23:08:42,339 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 23:08:42,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 23:08:42,341 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 23:08:42,341 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 23:08:42,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 23:08:42,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 23:08:42,345 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 23:08:42,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 23:08:42,349 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 23:08:42,351 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 23:08:42,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 23:08:42,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 23:08:42,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 23:08:42,358 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 23:08:42,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 23:08:42,362 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 23:08:42,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 23:08:42,372 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 23:08:42,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 23:08:42,373 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 23:08:42,397 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 23:08:42,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 23:08:42,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 23:08:42,401 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 23:08:42,402 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 23:08:42,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 23:08:42,402 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 23:08:42,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 23:08:42,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 23:08:42,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 23:08:42,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 23:08:42,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 23:08:42,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 23:08:42,404 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 23:08:42,404 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 23:08:42,404 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 23:08:42,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 23:08:42,405 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 23:08:42,405 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 23:08:42,405 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 23:08:42,407 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 23:08:42,407 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 23:08:42,408 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 23:08:42,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 23:08:42,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 23:08:42,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 23:08:42,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:42,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 23:08:42,410 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 23:08:42,410 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 23:08:42,756 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 23:08:42,777 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 23:08:42,781 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 23:08:42,785 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 23:08:42,788 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 23:08:42,789 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condnf.c [2020-07-21 23:08:42,883 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60d65726b/9d989ee585014e03ad05e496d8552300/FLAG57845d931 [2020-07-21 23:08:43,537 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 23:08:43,537 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condnf.c [2020-07-21 23:08:43,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60d65726b/9d989ee585014e03ad05e496d8552300/FLAG57845d931 [2020-07-21 23:08:43,850 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/60d65726b/9d989ee585014e03ad05e496d8552300 [2020-07-21 23:08:43,865 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 23:08:43,869 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 23:08:43,870 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 23:08:43,870 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 23:08:43,875 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 23:08:43,878 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:08:43" (1/1) ... [2020-07-21 23:08:43,881 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f2303c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:43, skipping insertion in model container [2020-07-21 23:08:43,881 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 11:08:43" (1/1) ... [2020-07-21 23:08:43,892 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 23:08:43,912 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 23:08:44,115 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:08:44,132 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 23:08:44,156 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 23:08:44,176 INFO L208 MainTranslator]: Completed translation [2020-07-21 23:08:44,177 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:44 WrapperNode [2020-07-21 23:08:44,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 23:08:44,178 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 23:08:44,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 23:08:44,179 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 23:08:44,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:44" (1/1) ... [2020-07-21 23:08:44,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:44" (1/1) ... [2020-07-21 23:08:44,319 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:44" (1/1) ... [2020-07-21 23:08:44,321 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:44" (1/1) ... [2020-07-21 23:08:44,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:44" (1/1) ... [2020-07-21 23:08:44,362 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:44" (1/1) ... [2020-07-21 23:08:44,368 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:44" (1/1) ... [2020-07-21 23:08:44,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 23:08:44,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 23:08:44,376 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 23:08:44,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 23:08:44,382 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:44" (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 23:08:44,445 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 23:08:44,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 23:08:44,446 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 23:08:44,446 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 23:08:44,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 23:08:44,446 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 23:08:44,446 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 23:08:44,447 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 23:08:44,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 23:08:44,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 23:08:44,447 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 23:08:44,448 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 23:08:44,448 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 23:08:44,448 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 23:08:44,448 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 23:08:44,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 23:08:44,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 23:08:44,449 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 23:08:44,752 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 23:08:44,753 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 23:08:44,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:08:44 BoogieIcfgContainer [2020-07-21 23:08:44,767 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 23:08:44,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 23:08:44,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 23:08:44,776 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 23:08:44,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 11:08:43" (1/3) ... [2020-07-21 23:08:44,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b32cd17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:08:44, skipping insertion in model container [2020-07-21 23:08:44,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 11:08:44" (2/3) ... [2020-07-21 23:08:44,781 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b32cd17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 11:08:44, skipping insertion in model container [2020-07-21 23:08:44,781 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 11:08:44" (3/3) ... [2020-07-21 23:08:44,788 INFO L109 eAbstractionObserver]: Analyzing ICFG condnf.c [2020-07-21 23:08:44,808 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 23:08:44,820 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 23:08:44,849 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 23:08:44,888 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 23:08:44,888 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 23:08:44,888 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 23:08:44,888 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 23:08:44,889 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 23:08:44,889 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 23:08:44,889 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 23:08:44,889 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 23:08:44,914 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-21 23:08:44,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 23:08:44,922 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:44,923 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 23:08:44,923 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:44,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:44,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1524373234, now seen corresponding path program 1 times [2020-07-21 23:08:44,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:44,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647335794] [2020-07-21 23:08:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:45,057 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 23:08:45,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:45,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 23:08:45,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:45,087 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 23:08:45,088 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:08:45,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647335794] [2020-07-21 23:08:45,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:08:45,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 23:08:45,091 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566864532] [2020-07-21 23:08:45,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 23:08:45,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:45,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 23:08:45,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 23:08:45,114 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-07-21 23:08:45,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:45,141 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-07-21 23:08:45,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 23:08:45,143 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-21 23:08:45,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:45,153 INFO L225 Difference]: With dead ends: 60 [2020-07-21 23:08:45,154 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 23:08:45,158 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 23:08:45,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 23:08:45,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 23:08:45,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 23:08:45,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-21 23:08:45,203 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-07-21 23:08:45,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:45,204 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-21 23:08:45,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 23:08:45,204 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-21 23:08:45,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 23:08:45,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:45,206 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 23:08:45,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:45,423 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:45,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:45,424 INFO L82 PathProgramCache]: Analyzing trace with hash -2111179248, now seen corresponding path program 1 times [2020-07-21 23:08:45,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:45,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101216815] [2020-07-21 23:08:45,426 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:45,493 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 23:08:45,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 23:08:45,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 23:08:45,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 23:08:45,565 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 23:08:45,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 23:08:45,565 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101216815] [2020-07-21 23:08:45,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 23:08:45,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 23:08:45,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411788403] [2020-07-21 23:08:45,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 23:08:45,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 23:08:45,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 23:08:45,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 23:08:45,570 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 4 states. [2020-07-21 23:08:45,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 23:08:45,680 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-07-21 23:08:45,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 23:08:45,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-21 23:08:45,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 23:08:45,686 INFO L225 Difference]: With dead ends: 54 [2020-07-21 23:08:45,687 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 23:08:45,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 19 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 23:08:45,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 23:08:45,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-07-21 23:08:45,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 23:08:45,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 23:08:45,705 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2020-07-21 23:08:45,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 23:08:45,706 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 23:08:45,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 23:08:45,706 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 23:08:45,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 23:08:45,707 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 23:08:45,707 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] [2020-07-21 23:08:45,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:45,923 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 23:08:45,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 23:08:45,925 INFO L82 PathProgramCache]: Analyzing trace with hash 373909448, now seen corresponding path program 1 times [2020-07-21 23:08:45,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 23:08:45,925 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711538456] [2020-07-21 23:08:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:46,035 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 23:08:46,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 23:08:46,036 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:08:46,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 23:08:46,062 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 23:08:46,096 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 23:08:46,096 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 23:08:46,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 23:08:46,356 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 11:08:46 BoogieIcfgContainer [2020-07-21 23:08:46,356 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 23:08:46,359 INFO L168 Benchmark]: Toolchain (without parser) took 2491.48 ms. Allocated memory was 136.3 MB in the beginning and 201.3 MB in the end (delta: 65.0 MB). Free memory was 101.4 MB in the beginning and 103.6 MB in the end (delta: -2.2 MB). Peak memory consumption was 62.9 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:46,360 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-07-21 23:08:46,361 INFO L168 Benchmark]: CACSL2BoogieTranslator took 307.70 ms. Allocated memory is still 136.3 MB. Free memory was 101.0 MB in the beginning and 90.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:46,363 INFO L168 Benchmark]: Boogie Preprocessor took 197.06 ms. Allocated memory was 136.3 MB in the beginning and 201.3 MB in the end (delta: 65.0 MB). Free memory was 90.8 MB in the beginning and 179.3 MB in the end (delta: -88.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:46,364 INFO L168 Benchmark]: RCFGBuilder took 391.81 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 162.8 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:46,365 INFO L168 Benchmark]: TraceAbstraction took 1586.60 ms. Allocated memory is still 201.3 MB. Free memory was 162.1 MB in the beginning and 103.6 MB in the end (delta: 58.5 MB). Peak memory consumption was 58.5 MB. Max. memory is 7.1 GB. [2020-07-21 23:08:46,370 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 136.3 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 307.70 ms. Allocated memory is still 136.3 MB. Free memory was 101.0 MB in the beginning and 90.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 197.06 ms. Allocated memory was 136.3 MB in the beginning and 201.3 MB in the end (delta: 65.0 MB). Free memory was 90.8 MB in the beginning and 179.3 MB in the end (delta: -88.5 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 391.81 ms. Allocated memory is still 201.3 MB. Free memory was 179.3 MB in the beginning and 162.8 MB in the end (delta: 16.5 MB). Peak memory consumption was 16.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1586.60 ms. Allocated memory is still 201.3 MB. Free memory was 162.1 MB in the beginning and 103.6 MB in the end (delta: 58.5 MB). Peak memory consumption was 58.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; VAL [\old(N)=6, N=0] [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; [L26] int *a = malloc(sizeof(int)*N); [L28] i=0 VAL [\old(N)=0, a={8856:0}, i=0, malloc(sizeof(int)*N)={8856:0}, N=1] [L28] COND TRUE i N [L36] EXPR a[i] [L36] a[i] = a[i] [L33] i++ VAL [\old(N)=0, a={8856:0}, i=1, malloc(sizeof(int)*N)={8856:0}, N=1] [L33] COND FALSE !(i