/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-tiling/skippedu.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 13:42:08,301 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 13:42:08,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 13:42:08,348 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 13:42:08,349 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 13:42:08,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 13:42:08,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 13:42:08,367 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 13:42:08,369 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 13:42:08,372 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 13:42:08,373 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 13:42:08,374 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 13:42:08,375 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 13:42:08,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 13:42:08,380 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 13:42:08,382 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 13:42:08,383 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 13:42:08,384 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 13:42:08,386 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 13:42:08,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 13:42:08,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 13:42:08,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 13:42:08,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 13:42:08,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 13:42:08,405 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 13:42:08,410 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-04 13:42:08,411 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-04 13:42:08,412 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-04 13:42:08,413 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-04 13:42:08,414 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-04 13:42:08,414 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-04 13:42:08,415 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-04 13:42:08,415 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-04 13:42:08,416 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 13:42:08,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 13:42:08,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 13:42:08,419 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-04 13:42:08,471 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 13:42:08,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 13:42:08,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-04 13:42:08,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-04 13:42:08,474 INFO L138 SettingsManager]: * Use SBE=true [2020-09-04 13:42:08,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 13:42:08,475 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 13:42:08,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 13:42:08,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 13:42:08,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 13:42:08,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 13:42:08,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 13:42:08,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 13:42:08,477 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 13:42:08,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 13:42:08,477 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 13:42:08,477 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 13:42:08,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 13:42:08,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-04 13:42:08,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 13:42:08,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 13:42:08,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 13:42:08,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 13:42:08,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-04 13:42:08,479 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-04 13:42:08,479 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-04 13:42:08,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-04 13:42:08,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 13:42:08,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-04 13:42:08,480 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-04 13:42:08,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 13:42:08,945 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 13:42:08,949 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 13:42:08,951 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 13:42:08,952 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 13:42:08,953 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/skippedu.c [2020-09-04 13:42:09,055 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/15586b102/49585aa3a5734eab9b6580ae97e43cd7/FLAGd3814dbf3 [2020-09-04 13:42:09,606 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 13:42:09,607 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/skippedu.c [2020-09-04 13:42:09,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/15586b102/49585aa3a5734eab9b6580ae97e43cd7/FLAGd3814dbf3 [2020-09-04 13:42:09,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/15586b102/49585aa3a5734eab9b6580ae97e43cd7 [2020-09-04 13:42:09,960 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 13:42:09,962 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 13:42:09,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:09,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 13:42:09,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 13:42:09,972 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:09" (1/1) ... [2020-09-04 13:42:09,977 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3213de8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:09, skipping insertion in model container [2020-09-04 13:42:09,978 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 01:42:09" (1/1) ... [2020-09-04 13:42:09,989 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 13:42:10,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 13:42:10,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:10,288 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 13:42:10,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 13:42:10,336 INFO L208 MainTranslator]: Completed translation [2020-09-04 13:42:10,337 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:10 WrapperNode [2020-09-04 13:42:10,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 13:42:10,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 13:42:10,338 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 13:42:10,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 13:42:10,440 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:10" (1/1) ... [2020-09-04 13:42:10,440 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:10" (1/1) ... [2020-09-04 13:42:10,450 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:10" (1/1) ... [2020-09-04 13:42:10,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:10" (1/1) ... [2020-09-04 13:42:10,460 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:10" (1/1) ... [2020-09-04 13:42:10,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:10" (1/1) ... [2020-09-04 13:42:10,468 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:10" (1/1) ... [2020-09-04 13:42:10,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 13:42:10,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 13:42:10,476 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 13:42:10,476 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 13:42:10,477 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:10" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 13:42:10,550 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 13:42:10,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 13:42:10,551 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 13:42:10,551 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 13:42:10,551 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 13:42:10,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 13:42:10,552 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 13:42:10,552 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 13:42:10,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 13:42:10,552 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 13:42:10,552 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 13:42:10,553 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 13:42:10,553 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 13:42:10,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 13:42:10,553 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 13:42:10,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 13:42:10,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 13:42:10,554 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 13:42:10,907 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 13:42:10,907 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-04 13:42:10,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:10 BoogieIcfgContainer [2020-09-04 13:42:10,915 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 13:42:10,926 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 13:42:10,926 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 13:42:10,937 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 13:42:10,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 01:42:09" (1/3) ... [2020-09-04 13:42:10,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3117ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:10, skipping insertion in model container [2020-09-04 13:42:10,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 01:42:10" (2/3) ... [2020-09-04 13:42:10,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f3117ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 01:42:10, skipping insertion in model container [2020-09-04 13:42:10,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 01:42:10" (3/3) ... [2020-09-04 13:42:10,941 INFO L109 eAbstractionObserver]: Analyzing ICFG skippedu.c [2020-09-04 13:42:10,952 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-04 13:42:10,962 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 13:42:10,981 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 13:42:11,007 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 13:42:11,007 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 13:42:11,007 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-04 13:42:11,007 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 13:42:11,007 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 13:42:11,008 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 13:42:11,008 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 13:42:11,008 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 13:42:11,029 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-09-04 13:42:11,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-04 13:42:11,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:11,037 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 13:42:11,038 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:11,044 INFO L82 PathProgramCache]: Analyzing trace with hash -978746934, now seen corresponding path program 1 times [2020-09-04 13:42:11,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:11,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349926460] [2020-09-04 13:42:11,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:11,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:11,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-09-04 13:42:11,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:11,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349926460] [2020-09-04 13:42:11,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:11,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-04 13:42:11,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139662289] [2020-09-04 13:42:11,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-04 13:42:11,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:11,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-04 13:42:11,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:42:11,365 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 4 states. [2020-09-04 13:42:11,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:11,540 INFO L93 Difference]: Finished difference Result 67 states and 90 transitions. [2020-09-04 13:42:11,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-04 13:42:11,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 22 [2020-09-04 13:42:11,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:11,554 INFO L225 Difference]: With dead ends: 67 [2020-09-04 13:42:11,554 INFO L226 Difference]: Without dead ends: 34 [2020-09-04 13:42:11,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-04 13:42:11,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-04 13:42:11,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-09-04 13:42:11,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-04 13:42:11,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-09-04 13:42:11,613 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-09-04 13:42:11,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:11,613 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-09-04 13:42:11,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-04 13:42:11,614 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-09-04 13:42:11,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 13:42:11,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:11,615 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] [2020-09-04 13:42:11,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 13:42:11,616 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:11,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:11,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1791807978, now seen corresponding path program 1 times [2020-09-04 13:42:11,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:11,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515811419] [2020-09-04 13:42:11,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:11,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:11,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-04 13:42:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:11,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515811419] [2020-09-04 13:42:11,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948940436] [2020-09-04 13:42:11,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:11,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 4 conjunts are in the unsatisfiable core [2020-09-04 13:42:11,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 13:42:11,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:11,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2020-09-04 13:42:11,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899092041] [2020-09-04 13:42:11,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 13:42:11,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:11,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 13:42:11,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:42:11,907 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2020-09-04 13:42:12,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:12,068 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2020-09-04 13:42:12,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 13:42:12,068 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-04 13:42:12,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:12,070 INFO L225 Difference]: With dead ends: 59 [2020-09-04 13:42:12,070 INFO L226 Difference]: Without dead ends: 36 [2020-09-04 13:42:12,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:42:12,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-04 13:42:12,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-09-04 13:42:12,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-04 13:42:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-09-04 13:42:12,080 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 24 [2020-09-04 13:42:12,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:12,081 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-09-04 13:42:12,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 13:42:12,081 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-09-04 13:42:12,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-04 13:42:12,082 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:12,082 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] [2020-09-04 13:42:12,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-09-04 13:42:12,298 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:12,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:12,299 INFO L82 PathProgramCache]: Analyzing trace with hash 2002160904, now seen corresponding path program 2 times [2020-09-04 13:42:12,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:12,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556696804] [2020-09-04 13:42:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:12,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-04 13:42:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:12,579 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:42:12,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556696804] [2020-09-04 13:42:12,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 13:42:12,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-04 13:42:12,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572460498] [2020-09-04 13:42:12,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 13:42:12,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:12,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 13:42:12,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 13:42:12,583 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-09-04 13:42:12,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:12,755 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-09-04 13:42:12,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 13:42:12,756 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-09-04 13:42:12,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:12,757 INFO L225 Difference]: With dead ends: 51 [2020-09-04 13:42:12,757 INFO L226 Difference]: Without dead ends: 40 [2020-09-04 13:42:12,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-04 13:42:12,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-04 13:42:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-09-04 13:42:12,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-04 13:42:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2020-09-04 13:42:12,775 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 26 [2020-09-04 13:42:12,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:12,775 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2020-09-04 13:42:12,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 13:42:12,776 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2020-09-04 13:42:12,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 13:42:12,779 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:12,779 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, 1] [2020-09-04 13:42:12,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 13:42:12,779 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:12,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:12,780 INFO L82 PathProgramCache]: Analyzing trace with hash -709829620, now seen corresponding path program 1 times [2020-09-04 13:42:12,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:12,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677702466] [2020-09-04 13:42:12,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 13:42:13,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-04 13:42:13,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,134 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:42:13,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677702466] [2020-09-04 13:42:13,135 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674959777] [2020-09-04 13:42:13,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:13,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 13:42:13,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-04 13:42:13,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-04 13:42:13,267 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 20 treesize of output 16 [2020-09-04 13:42:13,268 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:13,279 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:13,280 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:13,280 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:20 [2020-09-04 13:42:13,348 INFO L350 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2020-09-04 13:42:13,348 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2020-09-04 13:42:13,350 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-09-04 13:42:13,355 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-09-04 13:42:13,356 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:13,356 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:19 [2020-09-04 13:42:13,432 INFO L350 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2020-09-04 13:42:13,432 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 36 [2020-09-04 13:42:13,437 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-04 13:42:13,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:13,444 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-09-04 13:42:13,477 INFO L625 ElimStorePlain]: treesize reduction 33, result has 17.5 percent of original size [2020-09-04 13:42:13,477 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-09-04 13:42:13,478 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:7 [2020-09-04 13:42:13,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-04 13:42:13,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-09-04 13:42:13,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-04 13:42:13,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2020-09-04 13:42:13,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866166177] [2020-09-04 13:42:13,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-04 13:42:13,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-04 13:42:13,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-04 13:42:13,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-09-04 13:42:13,570 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 18 states. [2020-09-04 13:42:14,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 13:42:14,199 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2020-09-04 13:42:14,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-04 13:42:14,199 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 31 [2020-09-04 13:42:14,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 13:42:14,205 INFO L225 Difference]: With dead ends: 86 [2020-09-04 13:42:14,205 INFO L226 Difference]: Without dead ends: 84 [2020-09-04 13:42:14,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2020-09-04 13:42:14,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-04 13:42:14,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 49. [2020-09-04 13:42:14,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-04 13:42:14,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-09-04 13:42:14,244 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 31 [2020-09-04 13:42:14,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 13:42:14,244 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-09-04 13:42:14,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-04 13:42:14,245 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-09-04 13:42:14,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-04 13:42:14,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 13:42:14,246 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, 1] [2020-09-04 13:42:14,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-04 13:42:14,459 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 13:42:14,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 13:42:14,460 INFO L82 PathProgramCache]: Analyzing trace with hash -8765042, now seen corresponding path program 1 times [2020-09-04 13:42:14,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-04 13:42:14,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922660843] [2020-09-04 13:42:14,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 13:42:14,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:42:14,491 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:42:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 13:42:14,517 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 13:42:14,544 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-09-04 13:42:14,544 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 13:42:14,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 13:42:14,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 01:42:14 BoogieIcfgContainer [2020-09-04 13:42:14,590 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 13:42:14,592 INFO L168 Benchmark]: Toolchain (without parser) took 4629.92 ms. Allocated memory was 140.5 MB in the beginning and 244.3 MB in the end (delta: 103.8 MB). Free memory was 103.8 MB in the beginning and 129.5 MB in the end (delta: -25.7 MB). Peak memory consumption was 78.1 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:14,593 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. [2020-09-04 13:42:14,594 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.02 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 93.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:14,595 INFO L168 Benchmark]: Boogie Preprocessor took 135.87 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 181.4 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:14,595 INFO L168 Benchmark]: RCFGBuilder took 440.42 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 163.5 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:14,596 INFO L168 Benchmark]: TraceAbstraction took 3664.19 ms. Allocated memory was 203.9 MB in the beginning and 244.3 MB in the end (delta: 40.4 MB). Free memory was 163.5 MB in the beginning and 129.5 MB in the end (delta: 34.0 MB). Peak memory consumption was 74.4 MB. Max. memory is 7.1 GB. [2020-09-04 13:42:14,601 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.6 kB). Peak memory consumption was 419.6 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 372.02 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 93.3 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.87 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 93.3 MB in the beginning and 181.4 MB in the end (delta: -88.2 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 440.42 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 163.5 MB in the end (delta: 17.9 MB). Peak memory consumption was 17.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3664.19 ms. Allocated memory was 203.9 MB in the beginning and 244.3 MB in the end (delta: 40.4 MB). Free memory was 163.5 MB in the beginning and 129.5 MB in the end (delta: 34.0 MB). Peak memory consumption was 74.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 6]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int SIZE; [L12] const int MAX = 100000; VAL [\old(MAX)=100003, \old(SIZE)=100002, MAX=100000, SIZE=0] [L16] SIZE = __VERIFIER_nondet_int() [L17] COND TRUE SIZE > 1 && SIZE < MAX [L19] int i; [L20] int *a = malloc(sizeof(int)*SIZE); [L22] i = 0 VAL [\old(SIZE)=0, a={-1:0}, i=0, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L22] COND TRUE i < SIZE [L24] a[i] = __VERIFIER_nondet_int() [L22] i++ VAL [\old(SIZE)=0, a={-1:0}, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L22] COND TRUE i < SIZE [L24] a[i] = __VERIFIER_nondet_int() [L22] i++ VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L22] COND FALSE !(i < SIZE) VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L27] COND FALSE !(SIZE % 2 != 0) VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L29] CALL assume_abort_if_not(SIZE % 2 == 0) VAL [\old(cond)=1, \old(SIZE)=0, MAX=100000, SIZE=2] [L4] COND FALSE !(!cond) VAL [\old(cond)=1, \old(SIZE)=0, cond=1, MAX=100000, SIZE=2] [L29] RET assume_abort_if_not(SIZE % 2 == 0) VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L30] i = 1 VAL [\old(SIZE)=0, a={-1:0}, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L30] COND TRUE i <= SIZE/2 [L32] EXPR a[2*i-2] VAL [\old(SIZE)=0, a={-1:0}, a[2*i-2]=1, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L32] COND FALSE !(a[2*i-2] > i) [L36] EXPR a[2*i-1] VAL [\old(SIZE)=0, a={-1:0}, a[2*i-1]=2, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L36] COND TRUE a[2*i-1] > i [L38] a[2*i-1] = 2*i-1 VAL [\old(SIZE)=0, a={-1:0}, i=1, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L30] i++ VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L30] COND FALSE !(i <= SIZE/2) VAL [\old(SIZE)=0, a={-1:0}, i=2, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L42] i = 0 VAL [\old(SIZE)=0, a={-1:0}, i=0, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L42] COND TRUE i < SIZE [L44] EXPR a[i] VAL [\old(SIZE)=0, a={-1:0}, a[i]=1, i=0, malloc(sizeof(int)*SIZE)={-1:0}, MAX=100000, SIZE=2] [L44] CALL __VERIFIER_assert( a[i] <= i ) VAL [\old(cond)=0, \old(SIZE)=0, MAX=100000, SIZE=2] [L6] COND TRUE !(cond) VAL [\old(cond)=0, \old(SIZE)=0, cond=0, MAX=100000, SIZE=2] [L6] __VERIFIER_error() VAL [\old(cond)=0, \old(SIZE)=0, cond=0, MAX=100000, SIZE=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.5s, OverallIterations: 5, TraceHistogramMax: 2, AutomataDifference: 1.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 125 SDtfs, 187 SDslu, 204 SDs, 0 SdLazy, 599 SolverSat, 72 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 102 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred 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, 4 MinimizatonAttempts, 41 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 189 NumberOfCodeBlocks, 189 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 152 ConstructedInterpolants, 0 QuantifiedInterpolants, 16772 SizeOfPredicates, 8 NumberOfNonLiveVariables, 215 ConjunctsInSsa, 14 ConjunctsInUnsatCore, 6 InterpolantComputations, 2 PerfectInterpolantSequences, 12/16 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...