/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 DAGSIZE --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-fpi/brs3f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 20:18:02,328 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 20:18:02,330 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 20:18:02,342 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 20:18:02,342 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 20:18:02,343 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 20:18:02,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 20:18:02,346 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 20:18:02,348 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 20:18:02,349 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 20:18:02,350 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 20:18:02,351 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 20:18:02,351 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 20:18:02,352 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 20:18:02,353 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 20:18:02,354 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 20:18:02,355 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 20:18:02,356 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 20:18:02,357 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 20:18:02,359 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 20:18:02,361 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 20:18:02,362 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 20:18:02,363 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 20:18:02,363 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 20:18:02,366 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-21 20:18:02,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 20:18:02,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 20:18:02,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 20:18:02,375 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 20:18:02,389 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 20:18:02,389 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 20:18:02,390 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 20:18:02,391 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 20:18:02,391 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 20:18:02,391 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 20:18:02,391 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-21 20:18:02,392 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 20:18:02,392 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-21 20:18:02,392 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 20:18:02,392 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 20:18:02,392 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 20:18:02,393 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 20:18:02,393 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-21 20:18:02,393 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 20:18:02,393 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 20:18:02,393 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 20:18:02,394 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 20:18:02,394 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 20:18:02,394 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 20:18:02,394 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 20:18:02,394 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 20:18:02,395 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 20:18:02,395 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 20:18:02,395 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 20:18:02,395 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 20:18:02,395 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:02,396 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 20:18:02,396 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 20:18:02,396 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 -> DAGSIZE 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 -> 2 [2020-07-21 20:18:02,679 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 20:18:02,692 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 20:18:02,695 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 20:18:02,696 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 20:18:02,697 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 20:18:02,697 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs3f.c [2020-07-21 20:18:02,774 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca4069eb2/d73f45fda04c4b35a2ae8a9d69b9985a/FLAG566463ad5 [2020-07-21 20:18:03,205 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 20:18:03,206 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs3f.c [2020-07-21 20:18:03,212 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca4069eb2/d73f45fda04c4b35a2ae8a9d69b9985a/FLAG566463ad5 [2020-07-21 20:18:03,573 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ca4069eb2/d73f45fda04c4b35a2ae8a9d69b9985a [2020-07-21 20:18:03,583 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 20:18:03,587 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 20:18:03,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:03,588 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 20:18:03,591 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 20:18:03,592 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,595 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55484ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03, skipping insertion in model container [2020-07-21 20:18:03,595 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 20:18:03,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 20:18:03,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:03,805 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 20:18:03,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 20:18:03,844 INFO L208 MainTranslator]: Completed translation [2020-07-21 20:18:03,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03 WrapperNode [2020-07-21 20:18:03,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 20:18:03,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 20:18:03,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 20:18:03,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 20:18:03,949 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,950 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,957 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (1/1) ... [2020-07-21 20:18:03,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 20:18:03,974 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 20:18:03,974 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 20:18:03,974 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 20:18:03,975 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (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 20:18:04,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 20:18:04,030 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 20:18:04,030 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-21 20:18:04,030 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-21 20:18:04,031 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 20:18:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 20:18:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-21 20:18:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-21 20:18:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-21 20:18:04,031 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 20:18:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-07-21 20:18:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 20:18:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 20:18:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-21 20:18:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 20:18:04,032 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 20:18:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 20:18:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 20:18:04,033 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 20:18:04,294 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 20:18:04,294 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-21 20:18:04,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:04 BoogieIcfgContainer [2020-07-21 20:18:04,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 20:18:04,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 20:18:04,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 20:18:04,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 20:18:04,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 08:18:03" (1/3) ... [2020-07-21 20:18:04,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c5e67a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:04, skipping insertion in model container [2020-07-21 20:18:04,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 08:18:03" (2/3) ... [2020-07-21 20:18:04,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c5e67a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 08:18:04, skipping insertion in model container [2020-07-21 20:18:04,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 08:18:04" (3/3) ... [2020-07-21 20:18:04,306 INFO L109 eAbstractionObserver]: Analyzing ICFG brs3f.c [2020-07-21 20:18:04,316 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 20:18:04,323 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 20:18:04,338 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 20:18:04,362 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 20:18:04,362 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 20:18:04,363 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 20:18:04,363 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 20:18:04,363 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 20:18:04,363 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 20:18:04,363 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 20:18:04,364 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 20:18:04,382 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-07-21 20:18:04,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-07-21 20:18:04,388 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:04,389 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] [2020-07-21 20:18:04,390 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:04,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:04,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1824292310, now seen corresponding path program 1 times [2020-07-21 20:18:04,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:04,409 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35999169] [2020-07-21 20:18:04,410 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:18:04,505 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 20:18:04,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:04,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:04,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:04,578 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 20:18:04,578 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:04,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [35999169] [2020-07-21 20:18:04,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:04,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-07-21 20:18:04,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528748347] [2020-07-21 20:18:04,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-07-21 20:18:04,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:04,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-07-21 20:18:04,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-07-21 20:18:04,600 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-07-21 20:18:04,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:04,750 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2020-07-21 20:18:04,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-07-21 20:18:04,752 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-07-21 20:18:04,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:04,761 INFO L225 Difference]: With dead ends: 66 [2020-07-21 20:18:04,762 INFO L226 Difference]: Without dead ends: 32 [2020-07-21 20:18:04,765 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 [2020-07-21 20:18:04,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-07-21 20:18:04,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-07-21 20:18:04,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-21 20:18:04,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-07-21 20:18:04,807 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 21 [2020-07-21 20:18:04,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:04,808 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-07-21 20:18:04,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-07-21 20:18:04,808 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-07-21 20:18:04,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 20:18:04,810 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:04,810 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 20:18:05,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:05,026 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:05,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:05,027 INFO L82 PathProgramCache]: Analyzing trace with hash -395878216, now seen corresponding path program 1 times [2020-07-21 20:18:05,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:05,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761435442] [2020-07-21 20:18:05,029 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:18:05,093 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:05,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:05,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:18:05,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:05,182 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-07-21 20:18:05,183 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:05,191 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:05,192 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:18:05,192 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:11 [2020-07-21 20:18:05,215 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2020-07-21 20:18:05,216 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 20:18:05,225 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 20:18:05,226 INFO L544 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 20:18:05,227 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:18, output treesize:7 [2020-07-21 20:18:05,240 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:18:05,245 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-21 20:18:05,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 20:18:05,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:05,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761435442] [2020-07-21 20:18:05,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:05,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 20:18:05,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952493433] [2020-07-21 20:18:05,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 20:18:05,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:05,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 20:18:05,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-21 20:18:05,281 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-07-21 20:18:05,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:05,405 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2020-07-21 20:18:05,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 20:18:05,406 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-07-21 20:18:05,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:05,407 INFO L225 Difference]: With dead ends: 37 [2020-07-21 20:18:05,407 INFO L226 Difference]: Without dead ends: 31 [2020-07-21 20:18:05,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-21 20:18:05,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-07-21 20:18:05,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2020-07-21 20:18:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-07-21 20:18:05,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-07-21 20:18:05,416 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 27 [2020-07-21 20:18:05,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:05,416 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-07-21 20:18:05,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 20:18:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-07-21 20:18:05,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-07-21 20:18:05,418 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:05,418 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 20:18:05,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:05,624 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:05,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:05,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1205224842, now seen corresponding path program 1 times [2020-07-21 20:18:05,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:05,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259966628] [2020-07-21 20:18:05,627 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 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 20:18:05,721 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:05,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:05,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2020-07-21 20:18:05,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-21 20:18:05,732 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 20:18:05,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259966628] [2020-07-21 20:18:05,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 20:18:05,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 20:18:05,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413901804] [2020-07-21 20:18:05,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 20:18:05,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:05,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 20:18:05,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:18:05,735 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 3 states. [2020-07-21 20:18:05,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:05,767 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-07-21 20:18:05,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 20:18:05,768 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-07-21 20:18:05,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:05,769 INFO L225 Difference]: With dead ends: 48 [2020-07-21 20:18:05,769 INFO L226 Difference]: Without dead ends: 33 [2020-07-21 20:18:05,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 20:18:05,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-21 20:18:05,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-07-21 20:18:05,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-07-21 20:18:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-07-21 20:18:05,776 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 27 [2020-07-21 20:18:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:05,776 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-07-21 20:18:05,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 20:18:05,777 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-07-21 20:18:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-21 20:18:05,778 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:05,778 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 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 20:18:05,992 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:05,993 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:05,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:05,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1239476407, now seen corresponding path program 1 times [2020-07-21 20:18:05,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:05,994 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707480728] [2020-07-21 20:18:05,994 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:06,036 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:06,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 20:18:06,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-21 20:18:06,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 20:18:06,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:18:06,083 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-21 20:18:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 20:18:06,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707480728] [2020-07-21 20:18:06,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-21 20:18:06,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-21 20:18:06,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564306634] [2020-07-21 20:18:06,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-21 20:18:06,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 20:18:06,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-21 20:18:06,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-07-21 20:18:06,131 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 9 states. [2020-07-21 20:18:06,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 20:18:06,245 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2020-07-21 20:18:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-21 20:18:06,246 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2020-07-21 20:18:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 20:18:06,247 INFO L225 Difference]: With dead ends: 54 [2020-07-21 20:18:06,247 INFO L226 Difference]: Without dead ends: 38 [2020-07-21 20:18:06,248 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-07-21 20:18:06,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-21 20:18:06,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2020-07-21 20:18:06,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-07-21 20:18:06,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-07-21 20:18:06,254 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 30 [2020-07-21 20:18:06,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 20:18:06,255 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-07-21 20:18:06,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-21 20:18:06,255 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-07-21 20:18:06,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-21 20:18:06,256 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 20:18:06,257 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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 20:18:06,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:06,472 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 20:18:06,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 20:18:06,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1492634651, now seen corresponding path program 1 times [2020-07-21 20:18:06,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 20:18:06,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098641039] [2020-07-21 20:18:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:06,523 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 20:18:06,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2020-07-21 20:18:06,524 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:18:06,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-21 20:18:06,542 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-21 20:18:06,579 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-21 20:18:06,579 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-21 20:18:06,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 20:18:06,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.07 08:18:06 BoogieIcfgContainer [2020-07-21 20:18:06,834 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-21 20:18:06,836 INFO L168 Benchmark]: Toolchain (without parser) took 3250.81 ms. Allocated memory was 142.1 MB in the beginning and 227.0 MB in the end (delta: 84.9 MB). Free memory was 99.7 MB in the beginning and 130.8 MB in the end (delta: -31.1 MB). Peak memory consumption was 53.9 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:06,836 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 142.1 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-07-21 20:18:06,837 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.64 ms. Allocated memory is still 142.1 MB. Free memory was 99.3 MB in the beginning and 88.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:06,838 INFO L168 Benchmark]: Boogie Preprocessor took 127.89 ms. Allocated memory was 142.1 MB in the beginning and 199.2 MB in the end (delta: 57.1 MB). Free memory was 88.9 MB in the beginning and 177.2 MB in the end (delta: -88.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:06,839 INFO L168 Benchmark]: RCFGBuilder took 324.82 ms. Allocated memory is still 199.2 MB. Free memory was 176.5 MB in the beginning and 159.3 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:06,840 INFO L168 Benchmark]: TraceAbstraction took 2534.40 ms. Allocated memory was 199.2 MB in the beginning and 227.0 MB in the end (delta: 27.8 MB). Free memory was 159.3 MB in the beginning and 130.8 MB in the end (delta: 28.5 MB). Peak memory consumption was 56.3 MB. Max. memory is 7.1 GB. [2020-07-21 20:18:06,844 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 142.1 MB. Free memory was 118.3 MB in the beginning and 118.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.64 ms. Allocated memory is still 142.1 MB. Free memory was 99.3 MB in the beginning and 88.9 MB in the end (delta: 10.4 MB). Peak memory consumption was 10.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.89 ms. Allocated memory was 142.1 MB in the beginning and 199.2 MB in the end (delta: 57.1 MB). Free memory was 88.9 MB in the beginning and 177.2 MB in the end (delta: -88.3 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 324.82 ms. Allocated memory is still 199.2 MB. Free memory was 176.5 MB in the beginning and 159.3 MB in the end (delta: 17.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2534.40 ms. Allocated memory was 199.2 MB in the beginning and 227.0 MB in the end (delta: 27.8 MB). Free memory was 159.3 MB in the beginning and 130.8 MB in the end (delta: 28.5 MB). Peak memory consumption was 56.3 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=2] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=2] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=2] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=2] [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=2, sum={2:0}] [L29] COND TRUE i