/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 01:38:14,923 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 01:38:14,926 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 01:38:14,938 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 01:38:14,939 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 01:38:14,941 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 01:38:14,943 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 01:38:14,945 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 01:38:14,947 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 01:38:14,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 01:38:14,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 01:38:14,950 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 01:38:14,950 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 01:38:14,951 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 01:38:14,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 01:38:14,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 01:38:14,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 01:38:14,955 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 01:38:14,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 01:38:14,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 01:38:14,961 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 01:38:14,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 01:38:14,963 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 01:38:14,964 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 01:38:14,968 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 01:38:14,977 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 01:38:14,978 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 01:38:14,979 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 01:38:14,980 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-21 01:38:14,996 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 01:38:14,997 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 01:38:14,998 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 01:38:14,998 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 01:38:14,998 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 01:38:14,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 01:38:14,999 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 01:38:14,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 01:38:14,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 01:38:14,999 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 01:38:15,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 01:38:15,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 01:38:15,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 01:38:15,000 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 01:38:15,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 01:38:15,001 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 01:38:15,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 01:38:15,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 01:38:15,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 01:38:15,001 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 01:38:15,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 01:38:15,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:38:15,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 01:38:15,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 01:38:15,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 01:38:15,003 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 01:38:15,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:15,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 01:38:15,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 01:38:15,003 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-21 01:38:15,330 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 01:38:15,346 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 01:38:15,349 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 01:38:15,352 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 01:38:15,353 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 01:38:15,354 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/condnf.c [2020-07-21 01:38:15,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/974240a5c/9be18d57226d4cef9fa8b25b293059d4/FLAGc55995c3f [2020-07-21 01:38:15,915 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 01:38:15,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/condnf.c [2020-07-21 01:38:15,924 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/974240a5c/9be18d57226d4cef9fa8b25b293059d4/FLAGc55995c3f [2020-07-21 01:38:16,275 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/974240a5c/9be18d57226d4cef9fa8b25b293059d4 [2020-07-21 01:38:16,285 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 01:38:16,288 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 01:38:16,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 01:38:16,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 01:38:16,296 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 01:38:16,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:38:16" (1/1) ... [2020-07-21 01:38:16,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a4becd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:16, skipping insertion in model container [2020-07-21 01:38:16,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 01:38:16" (1/1) ... [2020-07-21 01:38:16,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 01:38:16,328 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 01:38:16,513 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:38:16,524 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 01:38:16,545 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 01:38:16,562 INFO L208 MainTranslator]: Completed translation [2020-07-21 01:38:16,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:16 WrapperNode [2020-07-21 01:38:16,563 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 01:38:16,564 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 01:38:16,564 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 01:38:16,564 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 01:38:16,657 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:16" (1/1) ... [2020-07-21 01:38:16,658 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:16" (1/1) ... [2020-07-21 01:38:16,671 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:16" (1/1) ... [2020-07-21 01:38:16,673 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:16" (1/1) ... [2020-07-21 01:38:16,684 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:16" (1/1) ... [2020-07-21 01:38:16,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:16" (1/1) ... [2020-07-21 01:38:16,691 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:16" (1/1) ... [2020-07-21 01:38:16,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 01:38:16,694 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 01:38:16,694 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 01:38:16,694 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 01:38:16,695 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 01:38:16,768 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 01:38:16,769 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 01:38:16,769 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 01:38:16,769 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 01:38:16,769 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 01:38:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 01:38:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 01:38:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 01:38:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 01:38:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 01:38:16,770 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 01:38:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 01:38:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 01:38:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 01:38:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 01:38:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 01:38:16,771 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 01:38:16,772 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 01:38:17,109 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 01:38:17,109 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-07-21 01:38:17,115 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:38:17 BoogieIcfgContainer [2020-07-21 01:38:17,116 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 01:38:17,117 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 01:38:17,118 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 01:38:17,121 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 01:38:17,122 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 01:38:16" (1/3) ... [2020-07-21 01:38:17,122 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ed0af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:38:17, skipping insertion in model container [2020-07-21 01:38:17,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 01:38:16" (2/3) ... [2020-07-21 01:38:17,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9ed0af3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 01:38:17, skipping insertion in model container [2020-07-21 01:38:17,125 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 01:38:17" (3/3) ... [2020-07-21 01:38:17,126 INFO L109 eAbstractionObserver]: Analyzing ICFG condnf.c [2020-07-21 01:38:17,137 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 01:38:17,145 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 01:38:17,158 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 01:38:17,184 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 01:38:17,184 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 01:38:17,184 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 01:38:17,185 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 01:38:17,185 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 01:38:17,185 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 01:38:17,185 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 01:38:17,185 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 01:38:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-07-21 01:38:17,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 01:38:17,214 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:17,216 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 01:38:17,217 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:17,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:17,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1524373234, now seen corresponding path program 1 times [2020-07-21 01:38:17,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:17,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547055030] [2020-07-21 01:38:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:17,368 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 2 check-sat command(s) [2020-07-21 01:38:17,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:17,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-21 01:38:17,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:38:17,405 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:38:17,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547055030] [2020-07-21 01:38:17,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:38:17,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-21 01:38:17,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867448200] [2020-07-21 01:38:17,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-21 01:38:17,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:17,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-21 01:38:17,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-21 01:38:17,437 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 2 states. [2020-07-21 01:38:17,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:17,471 INFO L93 Difference]: Finished difference Result 60 states and 77 transitions. [2020-07-21 01:38:17,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-21 01:38:17,473 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 22 [2020-07-21 01:38:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:17,485 INFO L225 Difference]: With dead ends: 60 [2020-07-21 01:38:17,485 INFO L226 Difference]: Without dead ends: 30 [2020-07-21 01:38:17,490 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 01:38:17,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-21 01:38:17,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-21 01:38:17,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-21 01:38:17,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-07-21 01:38:17,547 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2020-07-21 01:38:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:17,548 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-07-21 01:38:17,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-21 01:38:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-07-21 01:38:17,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-21 01:38:17,550 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:17,550 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 01:38:17,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:17,768 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:17,769 INFO L82 PathProgramCache]: Analyzing trace with hash -2111179248, now seen corresponding path program 1 times [2020-07-21 01:38:17,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:17,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146420619] [2020-07-21 01:38:17,771 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:17,845 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-21 01:38:17,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 01:38:17,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 01:38:17,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 01:38:17,898 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 01:38:17,898 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 01:38:17,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146420619] [2020-07-21 01:38:17,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 01:38:17,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 01:38:17,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187680197] [2020-07-21 01:38:17,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 01:38:17,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 01:38:17,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 01:38:17,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 01:38:17,903 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 4 states. [2020-07-21 01:38:18,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 01:38:18,016 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2020-07-21 01:38:18,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 01:38:18,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-07-21 01:38:18,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 01:38:18,019 INFO L225 Difference]: With dead ends: 54 [2020-07-21 01:38:18,020 INFO L226 Difference]: Without dead ends: 39 [2020-07-21 01:38:18,021 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 01:38:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-21 01:38:18,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 32. [2020-07-21 01:38:18,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 01:38:18,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 01:38:18,036 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2020-07-21 01:38:18,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 01:38:18,037 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 01:38:18,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 01:38:18,037 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 01:38:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 01:38:18,038 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 01:38:18,038 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, 1] [2020-07-21 01:38:18,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:18,253 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 01:38:18,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 01:38:18,254 INFO L82 PathProgramCache]: Analyzing trace with hash 373909448, now seen corresponding path program 1 times [2020-07-21 01:38:18,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 01:38:18,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1014723171] [2020-07-21 01:38:18,256 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:18,349 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-21 01:38:18,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 01:38:18,349 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:38:18,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 01:38:18,376 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 01:38:18,416 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 01:38:18,416 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 01:38:18,630 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 01:38:18,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 01:38:18 BoogieIcfgContainer [2020-07-21 01:38:18,673 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 01:38:18,678 INFO L168 Benchmark]: Toolchain (without parser) took 2389.17 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 103.3 MB in the beginning and 103.2 MB in the end (delta: 108.2 kB). Peak memory consumption was 64.1 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:18,679 INFO L168 Benchmark]: CDTParser took 0.21 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 01:38:18,680 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.78 ms. Allocated memory is still 137.9 MB. Free memory was 102.9 MB in the beginning and 92.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:18,681 INFO L168 Benchmark]: Boogie Preprocessor took 130.21 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.5 MB in the beginning and 179.4 MB in the end (delta: -86.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:18,682 INFO L168 Benchmark]: RCFGBuilder took 421.59 ms. Allocated memory is still 201.9 MB. Free memory was 179.4 MB in the beginning and 162.4 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:18,683 INFO L168 Benchmark]: TraceAbstraction took 1556.22 ms. Allocated memory is still 201.9 MB. Free memory was 161.4 MB in the beginning and 103.2 MB in the end (delta: 58.3 MB). Peak memory consumption was 58.3 MB. Max. memory is 7.1 GB. [2020-07-21 01:38:18,687 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 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 273.78 ms. Allocated memory is still 137.9 MB. Free memory was 102.9 MB in the beginning and 92.5 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 130.21 ms. Allocated memory was 137.9 MB in the beginning and 201.9 MB in the end (delta: 64.0 MB). Free memory was 92.5 MB in the beginning and 179.4 MB in the end (delta: -86.9 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 421.59 ms. Allocated memory is still 201.9 MB. Free memory was 179.4 MB in the beginning and 162.4 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1556.22 ms. Allocated memory is still 201.9 MB. Free memory was 161.4 MB in the beginning and 103.2 MB in the end (delta: 58.3 MB). Peak memory consumption was 58.3 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