/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 NOT_INCREMENTALLY -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-20 11:20:11,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 11:20:11,448 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 11:20:11,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 11:20:11,468 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 11:20:11,470 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 11:20:11,472 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 11:20:11,486 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 11:20:11,488 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 11:20:11,489 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 11:20:11,491 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 11:20:11,493 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 11:20:11,493 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 11:20:11,494 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 11:20:11,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 11:20:11,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 11:20:11,497 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 11:20:11,498 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 11:20:11,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 11:20:11,502 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 11:20:11,503 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 11:20:11,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 11:20:11,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 11:20:11,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 11:20:11,508 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 11:20:11,516 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 11:20:11,516 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 11:20:11,517 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 11:20:11,518 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 11:20:11,533 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 11:20:11,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 11:20:11,535 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 11:20:11,535 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 11:20:11,535 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 11:20:11,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 11:20:11,536 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 11:20:11,536 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 11:20:11,536 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 11:20:11,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 11:20:11,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 11:20:11,537 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 11:20:11,537 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 11:20:11,537 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 11:20:11,537 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 11:20:11,537 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 11:20:11,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 11:20:11,538 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 11:20:11,538 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 11:20:11,538 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 11:20:11,538 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 11:20:11,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 11:20:11,539 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 11:20:11,539 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 11:20:11,539 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 11:20:11,539 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 11:20:11,540 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:20:11,540 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 11:20:11,540 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 11:20:11,540 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 -> NOT_INCREMENTALLY [2020-07-20 11:20:11,833 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 11:20:11,847 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 11:20:11,851 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 11:20:11,853 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 11:20:11,853 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 11:20:11,854 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2020-07-20 11:20:11,931 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6688e2ef1/de2a7bddca144aa49f4a06459a229712/FLAG15714bc01 [2020-07-20 11:20:12,514 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 11:20:12,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/verifythis/elimination_max_rec_onepoint.c [2020-07-20 11:20:12,525 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6688e2ef1/de2a7bddca144aa49f4a06459a229712/FLAG15714bc01 [2020-07-20 11:20:12,880 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6688e2ef1/de2a7bddca144aa49f4a06459a229712 [2020-07-20 11:20:12,891 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 11:20:12,894 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 11:20:12,895 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 11:20:12,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 11:20:12,899 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 11:20:12,900 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:20:12" (1/1) ... [2020-07-20 11:20:12,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24f2303c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:20:12, skipping insertion in model container [2020-07-20 11:20:12,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 11:20:12" (1/1) ... [2020-07-20 11:20:12,911 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 11:20:12,930 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 11:20:13,112 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:20:13,127 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 11:20:13,150 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 11:20:13,272 INFO L208 MainTranslator]: Completed translation [2020-07-20 11:20:13,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:20:13 WrapperNode [2020-07-20 11:20:13,274 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 11:20:13,275 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 11:20:13,275 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 11:20:13,275 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 11:20:13,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:20:13" (1/1) ... [2020-07-20 11:20:13,293 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:20:13" (1/1) ... [2020-07-20 11:20:13,309 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:20:13" (1/1) ... [2020-07-20 11:20:13,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:20:13" (1/1) ... [2020-07-20 11:20:13,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:20:13" (1/1) ... [2020-07-20 11:20:13,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:20:13" (1/1) ... [2020-07-20 11:20:13,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:20:13" (1/1) ... [2020-07-20 11:20:13,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 11:20:13,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 11:20:13,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 11:20:13,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 11:20:13,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:20:13" (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 11:20:13,393 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 11:20:13,394 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 11:20:13,394 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-20 11:20:13,394 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-20 11:20:13,394 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-07-20 11:20:13,394 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 11:20:13,395 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2020-07-20 11:20:13,395 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-07-20 11:20:13,395 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-20 11:20:13,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 11:20:13,395 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-20 11:20:13,395 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-20 11:20:13,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-20 11:20:13,396 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 11:20:13,396 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-07-20 11:20:13,396 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-20 11:20:13,396 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 11:20:13,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-07-20 11:20:13,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2020-07-20 11:20:13,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-20 11:20:13,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 11:20:13,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 11:20:13,397 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-20 11:20:13,723 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 11:20:13,724 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 11:20:13,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:20:13 BoogieIcfgContainer [2020-07-20 11:20:13,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 11:20:13,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 11:20:13,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 11:20:13,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 11:20:13,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 11:20:12" (1/3) ... [2020-07-20 11:20:13,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c62bdb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:20:13, skipping insertion in model container [2020-07-20 11:20:13,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 11:20:13" (2/3) ... [2020-07-20 11:20:13,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@c62bdb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 11:20:13, skipping insertion in model container [2020-07-20 11:20:13,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 11:20:13" (3/3) ... [2020-07-20 11:20:13,737 INFO L109 eAbstractionObserver]: Analyzing ICFG elimination_max_rec_onepoint.c [2020-07-20 11:20:13,748 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-20 11:20:13,755 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 11:20:13,769 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 11:20:13,796 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 11:20:13,796 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 11:20:13,796 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-20 11:20:13,797 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 11:20:13,797 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 11:20:13,798 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 11:20:13,798 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 11:20:13,798 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 11:20:13,820 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-07-20 11:20:13,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 11:20:13,827 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:20:13,828 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-20 11:20:13,829 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:20:13,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:20:13,835 INFO L82 PathProgramCache]: Analyzing trace with hash -640327596, now seen corresponding path program 1 times [2020-07-20 11:20:13,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:20:13,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [551521131] [2020-07-20 11:20:13,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:20:13,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:20:13,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 1 conjunts are in the unsatisfiable core [2020-07-20 11:20:13,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:20:13,992 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 11:20:13,992 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:20:13,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [551521131] [2020-07-20 11:20:13,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:20:13,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-07-20 11:20:13,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906780767] [2020-07-20 11:20:14,002 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-07-20 11:20:14,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:20:14,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-07-20 11:20:14,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-07-20 11:20:14,020 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 2 states. [2020-07-20 11:20:14,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:20:14,053 INFO L93 Difference]: Finished difference Result 83 states and 106 transitions. [2020-07-20 11:20:14,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-07-20 11:20:14,054 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-07-20 11:20:14,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:20:14,066 INFO L225 Difference]: With dead ends: 83 [2020-07-20 11:20:14,066 INFO L226 Difference]: Without dead ends: 40 [2020-07-20 11:20:14,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 29 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 11:20:14,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-07-20 11:20:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-07-20 11:20:14,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-07-20 11:20:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-07-20 11:20:14,123 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 30 [2020-07-20 11:20:14,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:20:14,124 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-07-20 11:20:14,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-07-20 11:20:14,124 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-07-20 11:20:14,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-07-20 11:20:14,127 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:20:14,127 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-20 11:20:14,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:20:14,343 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:20:14,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:20:14,343 INFO L82 PathProgramCache]: Analyzing trace with hash -1442541232, now seen corresponding path program 1 times [2020-07-20 11:20:14,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:20:14,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931407987] [2020-07-20 11:20:14,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:20:14,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:20:14,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 9 conjunts are in the unsatisfiable core [2020-07-20 11:20:14,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:20:14,524 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:20:14,527 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:20:14,536 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:20:14,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:20:14,563 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:20:14,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931407987] [2020-07-20 11:20:14,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:20:14,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-20 11:20:14,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642971026] [2020-07-20 11:20:14,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-20 11:20:14,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:20:14,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-20 11:20:14,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-20 11:20:14,568 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-07-20 11:20:14,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:20:14,702 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-07-20 11:20:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 11:20:14,703 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-07-20 11:20:14,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:20:14,706 INFO L225 Difference]: With dead ends: 46 [2020-07-20 11:20:14,706 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 11:20:14,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 11:20:14,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 11:20:14,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-20 11:20:14,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 11:20:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-07-20 11:20:14,721 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 30 [2020-07-20 11:20:14,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:20:14,724 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-07-20 11:20:14,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-20 11:20:14,724 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-07-20 11:20:14,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-07-20 11:20:14,726 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:20:14,726 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-07-20 11:20:14,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:20:14,941 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:20:14,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:20:14,942 INFO L82 PathProgramCache]: Analyzing trace with hash 389656800, now seen corresponding path program 1 times [2020-07-20 11:20:14,943 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:20:14,943 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139254557] [2020-07-20 11:20:14,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 11:20:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:20:15,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 11:20:15,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:20:15,055 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 7 treesize of output 6 [2020-07-20 11:20:15,056 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:20:15,085 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:20:15,085 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:20:15,086 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-07-20 11:20:17,141 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_main_~a~0.base_BEFORE_CALL_1 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_main_~a~0.base_BEFORE_CALL_1))) is different from true [2020-07-20 11:20:17,183 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 29 treesize of output 23 [2020-07-20 11:20:17,185 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:20:17,191 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:20:17,193 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-20 11:20:17,193 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2020-07-20 11:20:17,209 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:20:17,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:20:17,264 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:20:17,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139254557] [2020-07-20 11:20:17,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:20:17,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-07-20 11:20:17,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947116033] [2020-07-20 11:20:17,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 11:20:17,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:20:17,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 11:20:17,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=44, Unknown=1, NotChecked=12, Total=72 [2020-07-20 11:20:17,270 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 9 states. [2020-07-20 11:20:17,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:20:17,476 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2020-07-20 11:20:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:20:17,477 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-07-20 11:20:17,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:20:17,479 INFO L225 Difference]: With dead ends: 56 [2020-07-20 11:20:17,479 INFO L226 Difference]: Without dead ends: 44 [2020-07-20 11:20:17,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=34, Invalid=101, Unknown=1, NotChecked=20, Total=156 [2020-07-20 11:20:17,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-07-20 11:20:17,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-07-20 11:20:17,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-07-20 11:20:17,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-07-20 11:20:17,498 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 33 [2020-07-20 11:20:17,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:20:17,498 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-07-20 11:20:17,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 11:20:17,499 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-07-20 11:20:17,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 11:20:17,501 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:20:17,502 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:20:17,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:20:17,703 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:20:17,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:20:17,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1445821128, now seen corresponding path program 1 times [2020-07-20 11:20:17,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:20:17,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449204461] [2020-07-20 11:20:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 11:20:17,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:20:17,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 11:20:17,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:20:17,772 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 7 treesize of output 6 [2020-07-20 11:20:17,772 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:20:17,774 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:20:17,775 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:20:17,775 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-07-20 11:20:19,822 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_1 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_1))) is different from true [2020-07-20 11:20:21,871 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_2 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_2))) is different from true [2020-07-20 11:20:21,915 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 29 treesize of output 23 [2020-07-20 11:20:21,916 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:20:21,923 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:20:21,926 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-20 11:20:21,927 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2020-07-20 11:20:21,963 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-07-20 11:20:21,964 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-20 11:20:21,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449204461] [2020-07-20 11:20:21,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 11:20:21,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-07-20 11:20:21,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360720846] [2020-07-20 11:20:21,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 11:20:21,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:20:21,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 11:20:21,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=45, Unknown=2, NotChecked=26, Total=90 [2020-07-20 11:20:21,967 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 10 states. [2020-07-20 11:20:22,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:20:22,075 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-07-20 11:20:22,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 11:20:22,076 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 48 [2020-07-20 11:20:22,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:20:22,079 INFO L225 Difference]: With dead ends: 76 [2020-07-20 11:20:22,080 INFO L226 Difference]: Without dead ends: 50 [2020-07-20 11:20:22,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=29, Invalid=87, Unknown=2, NotChecked=38, Total=156 [2020-07-20 11:20:22,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-07-20 11:20:22,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-07-20 11:20:22,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 11:20:22,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2020-07-20 11:20:22,090 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 48 [2020-07-20 11:20:22,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:20:22,091 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2020-07-20 11:20:22,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 11:20:22,091 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2020-07-20 11:20:22,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-20 11:20:22,093 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 11:20:22,093 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 11:20:22,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:20:22,307 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 11:20:22,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 11:20:22,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2146885706, now seen corresponding path program 1 times [2020-07-20 11:20:22,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-20 11:20:22,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344126927] [2020-07-20 11:20:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-07-20 11:20:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 11:20:22,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 11:20:22,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 11:20:22,391 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 7 treesize of output 6 [2020-07-20 11:20:22,392 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:20:22,394 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:20:22,395 INFO L544 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-20 11:20:22,395 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:7, output treesize:6 [2020-07-20 11:20:24,453 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_3 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_3))) is different from true [2020-07-20 11:20:26,483 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_4 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_4))) is different from true [2020-07-20 11:20:28,525 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_check_~a.base_BEFORE_CALL_5 Int)) (= ((as const (Array Int Int)) 0) (select |c_#memory_int| v_check_~a.base_BEFORE_CALL_5))) is different from true [2020-07-20 11:20:28,566 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 29 treesize of output 23 [2020-07-20 11:20:28,568 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-20 11:20:28,574 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-20 11:20:28,577 INFO L544 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 3 dim-0 vars, and 1 xjuncts. [2020-07-20 11:20:28,577 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:29, output treesize:21 [2020-07-20 11:20:28,598 INFO L501 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-07-20 11:20:28,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 4 not checked. [2020-07-20 11:20:28,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-07-20 11:20:28,679 INFO L501 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-07-20 11:20:30,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344126927] [2020-07-20 11:20:30,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-20 11:20:30,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-20 11:20:30,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707308628] [2020-07-20 11:20:30,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 11:20:30,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-20 11:20:30,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 11:20:30,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=111, Unknown=4, NotChecked=66, Total=210 [2020-07-20 11:20:30,770 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand 13 states. [2020-07-20 11:20:30,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 11:20:30,954 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-07-20 11:20:30,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 11:20:30,955 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-07-20 11:20:30,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 11:20:30,956 INFO L225 Difference]: With dead ends: 50 [2020-07-20 11:20:30,956 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 11:20:30,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=48, Invalid=200, Unknown=4, NotChecked=90, Total=342 [2020-07-20 11:20:30,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 11:20:30,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 11:20:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 11:20:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 11:20:30,959 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 48 [2020-07-20 11:20:30,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 11:20:30,959 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 11:20:30,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 11:20:30,959 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 11:20:30,959 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 11:20:31,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 11:20:31,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 11:20:31,590 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:20:31,590 INFO L271 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:20:31,590 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:20:31,591 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:20:31,591 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 11:20:31,591 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:20:31,591 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:20:31,591 INFO L271 CegarLoopResult]: At program point assume_abort_if_notENTRY(lines 5 7) the Hoare annotation is: true [2020-07-20 11:20:31,592 INFO L268 CegarLoopResult]: For program point L6(line 6) no Hoare annotation was computed. [2020-07-20 11:20:31,592 INFO L268 CegarLoopResult]: For program point L6-2(lines 5 7) no Hoare annotation was computed. [2020-07-20 11:20:31,592 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 5 7) no Hoare annotation was computed. [2020-07-20 11:20:31,592 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 38 52) the Hoare annotation is: true [2020-07-20 11:20:31,592 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 38 52) no Hoare annotation was computed. [2020-07-20 11:20:31,592 INFO L264 CegarLoopResult]: At program point L48(line 48) the Hoare annotation is: (and (= ((as const (Array Int Int)) 0) (select |#memory_int| main_~a~0.base)) (exists ((main_~x~0 Int) (main_~i~0 Int) (main_~a~0.offset Int)) (let ((.cse0 ((as const (Array Int Int)) 0))) (and (<= main_~ai~1 (select .cse0 (+ (* main_~i~0 4) main_~a~0.offset))) (<= (select .cse0 (+ (* main_~x~0 4) main_~a~0.offset)) main_~ax~1))))) [2020-07-20 11:20:31,593 INFO L268 CegarLoopResult]: For program point L48-1(line 48) no Hoare annotation was computed. [2020-07-20 11:20:31,593 INFO L264 CegarLoopResult]: At program point L45(line 45) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (and (= .cse0 (select |#memory_int| |main_#t~malloc10.base|)) (= .cse0 (select |#memory_int| main_~a~0.base)))) [2020-07-20 11:20:31,593 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 38 52) no Hoare annotation was computed. [2020-07-20 11:20:31,593 INFO L271 CegarLoopResult]: At program point L44(line 44) the Hoare annotation is: true [2020-07-20 11:20:31,593 INFO L268 CegarLoopResult]: For program point L45-1(line 45) no Hoare annotation was computed. [2020-07-20 11:20:31,593 INFO L271 CegarLoopResult]: At program point L43(line 43) the Hoare annotation is: true [2020-07-20 11:20:31,594 INFO L268 CegarLoopResult]: For program point L44-1(line 44) no Hoare annotation was computed. [2020-07-20 11:20:31,594 INFO L268 CegarLoopResult]: For program point L43-1(line 43) no Hoare annotation was computed. [2020-07-20 11:20:31,594 INFO L271 CegarLoopResult]: At program point L40(line 40) the Hoare annotation is: true [2020-07-20 11:20:31,594 INFO L268 CegarLoopResult]: For program point L40-1(line 40) no Hoare annotation was computed. [2020-07-20 11:20:31,594 INFO L264 CegarLoopResult]: At program point L33(line 33) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (not (<= 0 |check_#in~x|)) (not (= .cse0 (select |#memory_int| |check_#in~a.base|))) (and (exists ((check_~x1~0 Int) (check_~i Int) (check_~a.offset Int)) (let ((.cse1 ((as const (Array Int Int)) 0))) (and (<= (select .cse1 (+ (* check_~x1~0 4) check_~a.offset)) check_~ax~0) (<= check_~ai~0 (select .cse1 (+ (* check_~i 4) check_~a.offset)))))) (= .cse0 (select |#memory_int| check_~a.base)) (<= 0 check_~x) (<= (+ check_~y 1) check_~n)))) [2020-07-20 11:20:31,594 INFO L268 CegarLoopResult]: For program point L33-1(line 33) no Hoare annotation was computed. [2020-07-20 11:20:31,595 INFO L271 CegarLoopResult]: At program point checkENTRY(lines 14 36) the Hoare annotation is: true [2020-07-20 11:20:31,595 INFO L268 CegarLoopResult]: For program point L27(line 27) no Hoare annotation was computed. [2020-07-20 11:20:31,595 INFO L268 CegarLoopResult]: For program point L24(lines 24 25) no Hoare annotation was computed. [2020-07-20 11:20:31,595 INFO L264 CegarLoopResult]: At program point L24-2(lines 24 25) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (not (<= 0 |check_#in~x|)) (not (= .cse0 (select |#memory_int| |check_#in~a.base|))) (and (= .cse0 (select |#memory_int| check_~a.base)) (<= 0 check_~x) (<= (+ check_~y 1) check_~n)))) [2020-07-20 11:20:31,595 INFO L268 CegarLoopResult]: For program point L19(line 19) no Hoare annotation was computed. [2020-07-20 11:20:31,595 INFO L268 CegarLoopResult]: For program point checkEXIT(lines 14 36) no Hoare annotation was computed. [2020-07-20 11:20:31,596 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (not (<= 0 |check_#in~x|)) (not (= .cse0 (select |#memory_int| |check_#in~a.base|))) (and (= .cse0 (select |#memory_int| check_~a.base)) (<= 0 check_~x) (<= (+ check_~y 1) check_~n)))) [2020-07-20 11:20:31,596 INFO L264 CegarLoopResult]: At program point L18-1(line 18) the Hoare annotation is: (let ((.cse0 ((as const (Array Int Int)) 0))) (or (not (<= (+ |check_#in~y| 1) |check_#in~n|)) (not (<= 0 |check_#in~x|)) (not (= .cse0 (select |#memory_int| |check_#in~a.base|))) (and (= .cse0 (select |#memory_int| check_~a.base)) (<= 0 check_~x) (<= (+ check_~y 1) check_~n)))) [2020-07-20 11:20:31,596 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-07-20 11:20:31,596 INFO L268 CegarLoopResult]: For program point checkFINAL(lines 14 36) no Hoare annotation was computed. [2020-07-20 11:20:31,596 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 8 10) the Hoare annotation is: true [2020-07-20 11:20:31,596 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 8 10) no Hoare annotation was computed. [2020-07-20 11:20:31,597 INFO L268 CegarLoopResult]: For program point L9(line 9) no Hoare annotation was computed. [2020-07-20 11:20:31,597 INFO L268 CegarLoopResult]: For program point L9-1(line 9) no Hoare annotation was computed. [2020-07-20 11:20:31,597 INFO L268 CegarLoopResult]: For program point L9-3(lines 8 10) no Hoare annotation was computed. [2020-07-20 11:20:31,597 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 9) no Hoare annotation was computed. [2020-07-20 11:20:31,597 INFO L271 CegarLoopResult]: At program point #Ultimate.meminitENTRY(line -1) the Hoare annotation is: true [2020-07-20 11:20:31,597 INFO L268 CegarLoopResult]: For program point #Ultimate.meminitEXIT(line -1) no Hoare annotation was computed. [2020-07-20 11:20:31,597 INFO L268 CegarLoopResult]: For program point #Ultimate.meminitFINAL(line -1) no Hoare annotation was computed. [2020-07-20 11:20:31,604 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 11:20:31 BoogieIcfgContainer [2020-07-20 11:20:31,604 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 11:20:31,607 INFO L168 Benchmark]: Toolchain (without parser) took 18713.38 ms. Allocated memory was 144.7 MB in the beginning and 248.0 MB in the end (delta: 103.3 MB). Free memory was 102.5 MB in the beginning and 152.5 MB in the end (delta: -50.0 MB). Peak memory consumption was 53.3 MB. Max. memory is 7.1 GB. [2020-07-20 11:20:31,607 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-20 11:20:31,608 INFO L168 Benchmark]: CACSL2BoogieTranslator took 378.92 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 102.0 MB in the beginning and 181.4 MB in the end (delta: -79.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-07-20 11:20:31,609 INFO L168 Benchmark]: Boogie Preprocessor took 51.72 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 178.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. [2020-07-20 11:20:31,610 INFO L168 Benchmark]: RCFGBuilder took 401.64 ms. Allocated memory is still 202.4 MB. Free memory was 178.8 MB in the beginning and 160.1 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. [2020-07-20 11:20:31,611 INFO L168 Benchmark]: TraceAbstraction took 17874.59 ms. Allocated memory was 202.4 MB in the beginning and 248.0 MB in the end (delta: 45.6 MB). Free memory was 159.4 MB in the beginning and 152.5 MB in the end (delta: 7.0 MB). Peak memory consumption was 52.6 MB. Max. memory is 7.1 GB. [2020-07-20 11:20:31,615 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 144.7 MB. Free memory was 120.8 MB in the beginning and 120.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 378.92 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 102.0 MB in the beginning and 181.4 MB in the end (delta: -79.3 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 51.72 ms. Allocated memory is still 202.4 MB. Free memory was 181.4 MB in the beginning and 178.8 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 401.64 ms. Allocated memory is still 202.4 MB. Free memory was 178.8 MB in the beginning and 160.1 MB in the end (delta: 18.8 MB). Peak memory consumption was 18.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 17874.59 ms. Allocated memory was 202.4 MB in the beginning and 248.0 MB in the end (delta: 45.6 MB). Free memory was 159.4 MB in the beginning and 152.5 MB in the end (delta: 7.0 MB). Peak memory consumption was 52.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 9]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 45 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 17.3s, OverallIterations: 5, TraceHistogramMax: 3, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 204 SDtfs, 53 SDslu, 707 SDs, 0 SdLazy, 272 SolverSat, 20 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 204 GetRequests, 150 SyntacticMatches, 9 SemanticMatches, 45 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 14.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=4, 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, 5 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 17 LocationsWithAnnotation, 51 PreInvPairs, 62 NumberOfFragments, 207 HoareAnnotationTreeSize, 51 FomulaSimplifications, 36 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 17 FomulaSimplificationsInter, 416 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 15.0s InterpolantComputationTime, 189 NumberOfCodeBlocks, 189 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 184 ConstructedInterpolants, 27 QuantifiedInterpolants, 23041 SizeOfPredicates, 29 NumberOfNonLiveVariables, 736 ConjunctsInSsa, 46 ConjunctsInUnsatCore, 5 InterpolantComputations, 4 PerfectInterpolantSequences, 40/44 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 correct! Received shutdown request...