/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:36:33,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:36:33,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:36:33,369 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:36:33,370 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:36:33,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:36:33,376 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:36:33,391 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:36:33,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:36:33,397 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:36:33,400 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:36:33,402 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:36:33,402 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:36:33,407 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:36:33,411 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:36:33,414 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:36:33,417 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:36:33,421 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:36:33,423 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:36:33,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:36:33,437 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:36:33,443 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:36:33,445 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:36:33,446 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:36:33,449 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:36:33,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:36:33,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:36:33,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:36:33,472 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 [2020-07-20 17:36:33,517 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:36:33,518 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:36:33,521 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:36:33,522 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:36:33,522 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:36:33,522 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:36:33,523 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:36:33,523 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:36:33,523 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:36:33,523 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:36:33,525 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:36:33,526 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:36:33,526 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:36:33,526 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:36:33,527 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:36:33,527 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:36:33,527 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:36:33,527 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:36:33,528 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:36:33,528 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:36:33,528 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:36:33,528 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:36:33,529 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:36:33,529 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:36:33,529 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:36:33,529 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:36:33,530 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:33,530 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:36:33,530 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:36:33,530 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 [2020-07-20 17:36:33,917 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:36:33,934 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:36:33,939 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:36:33,940 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:36:33,941 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:36:33,943 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs4f.c [2020-07-20 17:36:34,042 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41bca79b5/644afad2ffb8472e9c4103613010f50d/FLAGea49631a6 [2020-07-20 17:36:34,571 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:36:34,572 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs4f.c [2020-07-20 17:36:34,580 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41bca79b5/644afad2ffb8472e9c4103613010f50d/FLAGea49631a6 [2020-07-20 17:36:34,944 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/41bca79b5/644afad2ffb8472e9c4103613010f50d [2020-07-20 17:36:34,958 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:36:34,961 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:36:34,963 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:36:34,963 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:36:34,972 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:36:34,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:36:34" (1/1) ... [2020-07-20 17:36:34,979 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c7b11b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:34, skipping insertion in model container [2020-07-20 17:36:34,980 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:36:34" (1/1) ... [2020-07-20 17:36:34,993 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:36:35,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:36:35,270 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:36:35,283 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:36:35,309 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:36:35,331 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:36:35,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:35 WrapperNode [2020-07-20 17:36:35,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:36:35,334 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:36:35,334 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:36:35,334 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:36:35,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:35" (1/1) ... [2020-07-20 17:36:35,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:35" (1/1) ... [2020-07-20 17:36:35,468 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:35" (1/1) ... [2020-07-20 17:36:35,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:35" (1/1) ... [2020-07-20 17:36:35,478 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:35" (1/1) ... [2020-07-20 17:36:35,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:35" (1/1) ... [2020-07-20 17:36:35,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:35" (1/1) ... [2020-07-20 17:36:35,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:36:35,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:36:35,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:36:35,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:36:35,493 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:35" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:36:35,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:36:35,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:36:35,574 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:36:35,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:36:35,574 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:36:35,575 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:36:35,576 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:36:35,576 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:36:35,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:36:35,577 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:36:35,578 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:36:35,579 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:36:35,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 17:36:35,579 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:36:35,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:36:35,580 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:36:35,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:36:35,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:36:35,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:36:35,958 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:36:35,959 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 17:36:35,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:36:35 BoogieIcfgContainer [2020-07-20 17:36:35,966 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:36:35,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:36:35,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:36:35,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:36:35,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:36:34" (1/3) ... [2020-07-20 17:36:35,973 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e0e9a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:36:35, skipping insertion in model container [2020-07-20 17:36:35,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:36:35" (2/3) ... [2020-07-20 17:36:35,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48e0e9a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:36:35, skipping insertion in model container [2020-07-20 17:36:35,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:36:35" (3/3) ... [2020-07-20 17:36:35,976 INFO L109 eAbstractionObserver]: Analyzing ICFG brs4f.c [2020-07-20 17:36:35,988 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:36:35,998 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:36:36,016 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:36:36,046 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:36:36,047 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:36:36,047 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:36:36,047 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:36:36,047 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:36:36,047 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:36:36,047 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:36:36,048 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:36:36,066 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-20 17:36:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 17:36:36,072 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:36,074 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:36:36,074 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:36,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:36,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-07-20 17:36:36,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:36,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1515236627] [2020-07-20 17:36:36,092 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 [2020-07-20 17:36:36,202 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:36,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:36,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:36:36,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:36:36,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:36,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1515236627] [2020-07-20 17:36:36,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:36,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:36:36,246 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018003678] [2020-07-20 17:36:36,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:36:36,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:36,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:36:36,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:36:36,272 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2020-07-20 17:36:36,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:36,298 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2020-07-20 17:36:36,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:36:36,300 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-20 17:36:36,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:36,308 INFO L225 Difference]: With dead ends: 56 [2020-07-20 17:36:36,309 INFO L226 Difference]: Without dead ends: 26 [2020-07-20 17:36:36,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:36:36,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-07-20 17:36:36,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-07-20 17:36:36,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-07-20 17:36:36,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-07-20 17:36:36,361 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 21 [2020-07-20 17:36:36,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:36,362 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-07-20 17:36:36,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:36:36,362 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-07-20 17:36:36,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 17:36:36,364 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:36,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:36:36,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:36,579 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:36,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:36,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1767537087, now seen corresponding path program 1 times [2020-07-20 17:36:36,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:36,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700276044] [2020-07-20 17:36:36,582 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 [2020-07-20 17:36:36,646 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:36:36,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:36:36,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:36:36,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:36:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 17:36:36,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:36:36,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700276044] [2020-07-20 17:36:36,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:36:36,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:36:36,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954320423] [2020-07-20 17:36:36,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:36:36,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:36:36,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:36:36,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:36:36,729 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 4 states. [2020-07-20 17:36:36,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:36:36,896 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-07-20 17:36:36,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:36:36,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-20 17:36:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:36:36,898 INFO L225 Difference]: With dead ends: 42 [2020-07-20 17:36:36,899 INFO L226 Difference]: Without dead ends: 32 [2020-07-20 17:36:36,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:36:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-20 17:36:36,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-07-20 17:36:36,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 17:36:36,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-20 17:36:36,912 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2020-07-20 17:36:36,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:36:36,913 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-20 17:36:36,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:36:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-20 17:36:36,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-20 17:36:36,914 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:36:36,914 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] [2020-07-20 17:36:37,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:37,130 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:36:37,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:36:37,132 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-07-20 17:36:37,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:36:37,133 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2135812347] [2020-07-20 17:36:37,133 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 [2020-07-20 17:36:37,214 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:36:37,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:36:37,216 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:36:37,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:36:37,250 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:36:37,322 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:36:37,323 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:36:37,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:36:37,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:36:37 BoogieIcfgContainer [2020-07-20 17:36:37,585 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:36:37,589 INFO L168 Benchmark]: Toolchain (without parser) took 2627.81 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 102.6 MB in the beginning and 103.5 MB in the end (delta: -868.5 kB). Peak memory consumption was 63.6 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:37,590 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 17:36:37,591 INFO L168 Benchmark]: CACSL2BoogieTranslator took 370.08 ms. Allocated memory is still 137.9 MB. Free memory was 102.2 MB in the beginning and 91.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:37,592 INFO L168 Benchmark]: Boogie Preprocessor took 157.22 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 91.8 MB in the beginning and 180.2 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:37,593 INFO L168 Benchmark]: RCFGBuilder took 474.43 ms. Allocated memory is still 202.4 MB. Free memory was 180.2 MB in the beginning and 162.8 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:37,594 INFO L168 Benchmark]: TraceAbstraction took 1618.57 ms. Allocated memory is still 202.4 MB. Free memory was 162.8 MB in the beginning and 103.5 MB in the end (delta: 59.3 MB). Peak memory consumption was 59.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:36:37,599 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 137.9 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 370.08 ms. Allocated memory is still 137.9 MB. Free memory was 102.2 MB in the beginning and 91.8 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 157.22 ms. Allocated memory was 137.9 MB in the beginning and 202.4 MB in the end (delta: 64.5 MB). Free memory was 91.8 MB in the beginning and 180.2 MB in the end (delta: -88.4 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 474.43 ms. Allocated memory is still 202.4 MB. Free memory was 180.2 MB in the beginning and 162.8 MB in the end (delta: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1618.57 ms. Allocated memory is still 202.4 MB. Free memory was 162.8 MB in the beginning and 103.5 MB in the end (delta: 59.3 MB). Peak memory consumption was 59.3 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)=7, 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 sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L29] COND TRUE i