/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/ms2f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 17:38:38,320 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 17:38:38,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 17:38:38,334 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 17:38:38,335 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 17:38:38,336 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 17:38:38,337 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 17:38:38,339 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 17:38:38,340 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 17:38:38,341 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 17:38:38,342 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 17:38:38,343 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 17:38:38,343 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 17:38:38,344 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 17:38:38,345 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 17:38:38,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 17:38:38,347 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 17:38:38,348 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 17:38:38,349 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 17:38:38,353 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 17:38:38,356 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 17:38:38,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 17:38:38,359 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 17:38:38,359 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 17:38:38,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 17:38:38,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 17:38:38,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 17:38:38,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 17:38:38,382 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 17:38:38,407 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 17:38:38,408 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 17:38:38,409 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 17:38:38,409 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 17:38:38,410 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 17:38:38,410 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 17:38:38,410 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 17:38:38,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 17:38:38,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 17:38:38,411 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 17:38:38,412 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 17:38:38,412 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 17:38:38,412 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 17:38:38,413 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 17:38:38,413 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 17:38:38,413 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 17:38:38,413 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 17:38:38,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 17:38:38,414 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 17:38:38,414 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 17:38:38,414 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 17:38:38,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 17:38:38,414 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 17:38:38,415 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 17:38:38,415 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 17:38:38,415 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 17:38:38,415 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:38:38,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 17:38:38,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 17:38:38,416 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 17:38:38,707 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 17:38:38,723 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 17:38:38,726 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 17:38:38,727 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 17:38:38,727 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 17:38:38,728 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/ms2f.c [2020-07-20 17:38:38,801 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ffc9cbaa/0fc198deb22644368a2da6e2a0a772d9/FLAGd00de208b [2020-07-20 17:38:39,271 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 17:38:39,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/ms2f.c [2020-07-20 17:38:39,278 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ffc9cbaa/0fc198deb22644368a2da6e2a0a772d9/FLAGd00de208b [2020-07-20 17:38:39,639 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0ffc9cbaa/0fc198deb22644368a2da6e2a0a772d9 [2020-07-20 17:38:39,648 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 17:38:39,651 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 17:38:39,652 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 17:38:39,652 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 17:38:39,655 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 17:38:39,656 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:38:39" (1/1) ... [2020-07-20 17:38:39,659 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30732442 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:38:39, skipping insertion in model container [2020-07-20 17:38:39,660 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:38:39" (1/1) ... [2020-07-20 17:38:39,667 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 17:38:39,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 17:38:39,886 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:38:39,896 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 17:38:39,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 17:38:39,946 INFO L208 MainTranslator]: Completed translation [2020-07-20 17:38:39,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:38:39 WrapperNode [2020-07-20 17:38:39,947 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 17:38:39,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 17:38:39,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 17:38:39,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 17:38:40,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:38:39" (1/1) ... [2020-07-20 17:38:40,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:38:39" (1/1) ... [2020-07-20 17:38:40,048 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:38:39" (1/1) ... [2020-07-20 17:38:40,048 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:38:39" (1/1) ... [2020-07-20 17:38:40,055 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:38:39" (1/1) ... [2020-07-20 17:38:40,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:38:39" (1/1) ... [2020-07-20 17:38:40,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:38:39" (1/1) ... [2020-07-20 17:38:40,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 17:38:40,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 17:38:40,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 17:38:40,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 17:38:40,065 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:38:39" (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 17:38:40,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 17:38:40,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 17:38:40,129 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 17:38:40,130 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 17:38:40,130 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 17:38:40,130 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 17:38:40,130 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 17:38:40,130 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 17:38:40,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 17:38:40,135 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 17:38:40,136 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-20 17:38:40,136 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 17:38:40,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-20 17:38:40,136 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 17:38:40,136 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 17:38:40,137 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 17:38:40,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 17:38:40,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 17:38:40,137 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 17:38:40,436 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 17:38:40,436 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-20 17:38:40,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:38:40 BoogieIcfgContainer [2020-07-20 17:38:40,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 17:38:40,441 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 17:38:40,441 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 17:38:40,444 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 17:38:40,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:38:39" (1/3) ... [2020-07-20 17:38:40,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222c3fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:38:40, skipping insertion in model container [2020-07-20 17:38:40,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:38:39" (2/3) ... [2020-07-20 17:38:40,446 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@222c3fa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:38:40, skipping insertion in model container [2020-07-20 17:38:40,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:38:40" (3/3) ... [2020-07-20 17:38:40,450 INFO L109 eAbstractionObserver]: Analyzing ICFG ms2f.c [2020-07-20 17:38:40,460 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 17:38:40,468 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 17:38:40,482 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 17:38:40,514 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 17:38:40,514 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 17:38:40,514 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 17:38:40,515 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 17:38:40,515 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 17:38:40,515 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 17:38:40,515 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 17:38:40,515 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 17:38:40,532 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-07-20 17:38:40,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 17:38:40,538 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:38:40,538 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 17:38:40,539 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:38:40,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:38:40,545 INFO L82 PathProgramCache]: Analyzing trace with hash -432131487, now seen corresponding path program 1 times [2020-07-20 17:38:40,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:38:40,553 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239446540] [2020-07-20 17:38:40,553 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 17:38:40,668 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:38:40,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:38:40,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 17:38:40,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:38:40,698 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 17:38:40,699 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:38:40,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239446540] [2020-07-20 17:38:40,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:38:40,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 17:38:40,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914232999] [2020-07-20 17:38:40,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 17:38:40,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:38:40,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 17:38:40,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 17:38:40,726 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-07-20 17:38:40,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:38:40,747 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2020-07-20 17:38:40,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 17:38:40,749 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 21 [2020-07-20 17:38:40,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:38:40,756 INFO L225 Difference]: With dead ends: 54 [2020-07-20 17:38:40,756 INFO L226 Difference]: Without dead ends: 25 [2020-07-20 17:38:40,760 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 17:38:40,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-07-20 17:38:40,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-07-20 17:38:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-07-20 17:38:40,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-07-20 17:38:40,797 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 21 [2020-07-20 17:38:40,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:38:40,798 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-07-20 17:38:40,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 17:38:40,798 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-07-20 17:38:40,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-20 17:38:40,800 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:38:40,800 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 17:38:41,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:38:41,016 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:38:41,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:38:41,017 INFO L82 PathProgramCache]: Analyzing trace with hash -173966049, now seen corresponding path program 1 times [2020-07-20 17:38:41,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:38:41,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595704753] [2020-07-20 17:38:41,018 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 17:38:41,080 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 3 check-sat command(s) [2020-07-20 17:38:41,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 17:38:41,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-20 17:38:41,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 17:38:41,134 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 17:38:41,134 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 17:38:41,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595704753] [2020-07-20 17:38:41,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 17:38:41,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-20 17:38:41,139 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397830686] [2020-07-20 17:38:41,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-20 17:38:41,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 17:38:41,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-20 17:38:41,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-20 17:38:41,142 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 4 states. [2020-07-20 17:38:41,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 17:38:41,238 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2020-07-20 17:38:41,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-20 17:38:41,241 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-20 17:38:41,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 17:38:41,242 INFO L225 Difference]: With dead ends: 40 [2020-07-20 17:38:41,243 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 17:38:41,246 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 17:38:41,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 17:38:41,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-07-20 17:38:41,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 17:38:41,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-07-20 17:38:41,262 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 21 [2020-07-20 17:38:41,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 17:38:41,262 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-07-20 17:38:41,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-20 17:38:41,263 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-07-20 17:38:41,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-07-20 17:38:41,266 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 17:38:41,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 17:38:41,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:38:41,468 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 17:38:41,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 17:38:41,469 INFO L82 PathProgramCache]: Analyzing trace with hash -445719797, now seen corresponding path program 1 times [2020-07-20 17:38:41,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 17:38:41,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922762247] [2020-07-20 17:38:41,471 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 17:38:41,553 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 4 partitions) issued 4 check-sat command(s) [2020-07-20 17:38:41,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-20 17:38:41,554 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:38:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 17:38:41,573 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 17:38:41,614 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-20 17:38:41,623 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 17:38:41,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 17:38:41,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:38:41 BoogieIcfgContainer [2020-07-20 17:38:41,876 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 17:38:41,879 INFO L168 Benchmark]: Toolchain (without parser) took 2227.92 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 103.5 MB in the beginning and 104.8 MB in the end (delta: -1.3 MB). Peak memory consumption was 62.7 MB. Max. memory is 7.1 GB. [2020-07-20 17:38:41,880 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 17:38:41,881 INFO L168 Benchmark]: CACSL2BoogieTranslator took 295.27 ms. Allocated memory is still 138.4 MB. Free memory was 103.1 MB in the beginning and 92.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-20 17:38:41,882 INFO L168 Benchmark]: Boogie Preprocessor took 116.28 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.7 MB in the beginning and 180.8 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:38:41,883 INFO L168 Benchmark]: RCFGBuilder took 376.12 ms. Allocated memory is still 202.4 MB. Free memory was 180.8 MB in the beginning and 163.6 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-07-20 17:38:41,884 INFO L168 Benchmark]: TraceAbstraction took 1434.92 ms. Allocated memory is still 202.4 MB. Free memory was 162.9 MB in the beginning and 104.8 MB in the end (delta: 58.1 MB). Peak memory consumption was 58.1 MB. Max. memory is 7.1 GB. [2020-07-20 17:38:41,888 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 138.4 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 295.27 ms. Allocated memory is still 138.4 MB. Free memory was 103.1 MB in the beginning and 92.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 116.28 ms. Allocated memory was 138.4 MB in the beginning and 202.4 MB in the end (delta: 64.0 MB). Free memory was 92.7 MB in the beginning and 180.8 MB in the end (delta: -88.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 376.12 ms. Allocated memory is still 202.4 MB. Free memory was 180.8 MB in the beginning and 163.6 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1434.92 ms. Allocated memory is still 202.4 MB. Free memory was 162.9 MB in the beginning and 104.8 MB in the end (delta: 58.1 MB). Peak memory consumption was 58.1 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)=5, 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 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 N) VAL [\old(cond)=0, \old(N)=0, N=1] [L13] COND TRUE !(cond) VAL [\old(cond)=0, \old(N)=0, cond=0, N=1] [L13] __VERIFIER_error() VAL [\old(cond)=0, \old(N)=0, cond=0, N=1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 53 SDtfs, 17 SDslu, 15 SDs, 0 SdLazy, 24 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 40 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 3 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 68 NumberOfCodeBlocks, 62 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 40 ConstructedInterpolants, 0 QuantifiedInterpolants, 1160 SizeOfPredicates, 2 NumberOfNonLiveVariables, 164 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...