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 --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/array-tiling/nr4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:38:55,318 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:38:55,321 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:38:55,340 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:38:55,340 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:38:55,342 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:38:55,345 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:38:55,357 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:38:55,360 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:38:55,360 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:38:55,362 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:38:55,363 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:38:55,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:38:55,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:38:55,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:38:55,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:38:55,369 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:38:55,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:38:55,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:38:55,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:38:55,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:38:55,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:38:55,383 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:38:55,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:38:55,387 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:38:55,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:38:55,400 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:38:55,402 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:38:55,403 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 [2019-10-13 21:38:55,418 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:38:55,418 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:38:55,420 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:38:55,420 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:38:55,420 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:38:55,420 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:38:55,420 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:38:55,421 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:38:55,421 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:38:55,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:38:55,421 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:38:55,421 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:38:55,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:38:55,422 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:38:55,422 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:38:55,422 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:38:55,422 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:38:55,423 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:38:55,423 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:38:55,423 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:38:55,423 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:38:55,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:38:55,424 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:38:55,424 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:38:55,424 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:38:55,424 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:38:55,424 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:38:55,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:38:55,425 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-13 21:38:55,720 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:38:55,733 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:38:55,736 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:38:55,737 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:38:55,738 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:38:55,738 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/nr4.c [2019-10-13 21:38:55,796 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79782fd51/c0209839a8c841f7b4a3504d09b766cd/FLAG1806ae68d [2019-10-13 21:38:56,244 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:38:56,246 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-tiling/nr4.c [2019-10-13 21:38:56,254 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79782fd51/c0209839a8c841f7b4a3504d09b766cd/FLAG1806ae68d [2019-10-13 21:38:56,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79782fd51/c0209839a8c841f7b4a3504d09b766cd [2019-10-13 21:38:56,652 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:38:56,653 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:38:56,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:38:56,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:38:56,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:38:56,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:38:56" (1/1) ... [2019-10-13 21:38:56,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a57a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:56, skipping insertion in model container [2019-10-13 21:38:56,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:38:56" (1/1) ... [2019-10-13 21:38:56,670 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:38:56,690 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:38:56,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:38:56,874 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:38:56,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:38:56,994 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:38:56,994 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:56 WrapperNode [2019-10-13 21:38:56,994 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:38:56,995 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:38:56,995 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:38:56,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:38:57,008 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:56" (1/1) ... [2019-10-13 21:38:57,008 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:56" (1/1) ... [2019-10-13 21:38:57,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:56" (1/1) ... [2019-10-13 21:38:57,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:56" (1/1) ... [2019-10-13 21:38:57,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:56" (1/1) ... [2019-10-13 21:38:57,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:56" (1/1) ... [2019-10-13 21:38:57,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:56" (1/1) ... [2019-10-13 21:38:57,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:38:57,036 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:38:57,036 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:38:57,036 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:38:57,037 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:56" (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 [2019-10-13 21:38:57,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:38:57,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:38:57,096 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 21:38:57,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:38:57,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:38:57,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 21:38:57,097 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 21:38:57,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:38:57,098 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:38:57,098 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:38:57,098 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:38:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:38:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:38:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:38:57,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:38:57,519 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:38:57,520 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-10-13 21:38:57,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:38:57 BoogieIcfgContainer [2019-10-13 21:38:57,521 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:38:57,523 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:38:57,523 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:38:57,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:38:57,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:38:56" (1/3) ... [2019-10-13 21:38:57,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3882087a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:38:57, skipping insertion in model container [2019-10-13 21:38:57,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:38:56" (2/3) ... [2019-10-13 21:38:57,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3882087a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:38:57, skipping insertion in model container [2019-10-13 21:38:57,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:38:57" (3/3) ... [2019-10-13 21:38:57,530 INFO L109 eAbstractionObserver]: Analyzing ICFG nr4.c [2019-10-13 21:38:57,540 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:38:57,548 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:38:57,559 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:38:57,580 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:38:57,581 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:38:57,581 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:38:57,581 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:38:57,581 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:38:57,581 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:38:57,581 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:38:57,581 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:38:57,599 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-10-13 21:38:57,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 21:38:57,605 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:57,606 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:57,608 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:57,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1583936272, now seen corresponding path program 1 times [2019-10-13 21:38:57,621 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:57,621 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569439443] [2019-10-13 21:38:57,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:57,622 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:57,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:38:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:38:58,053 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569439443] [2019-10-13 21:38:58,055 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:38:58,055 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 21:38:58,056 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654186972] [2019-10-13 21:38:58,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:38:58,063 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:38:58,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:38:58,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:38:58,082 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 4 states. [2019-10-13 21:38:58,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:38:58,196 INFO L93 Difference]: Finished difference Result 44 states and 52 transitions. [2019-10-13 21:38:58,196 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:38:58,198 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-13 21:38:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:38:58,207 INFO L225 Difference]: With dead ends: 44 [2019-10-13 21:38:58,208 INFO L226 Difference]: Without dead ends: 20 [2019-10-13 21:38:58,211 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:38:58,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-13 21:38:58,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2019-10-13 21:38:58,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-13 21:38:58,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-10-13 21:38:58,255 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 13 [2019-10-13 21:38:58,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:38:58,256 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-10-13 21:38:58,256 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:38:58,256 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-10-13 21:38:58,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 21:38:58,257 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:58,257 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:58,258 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:58,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:58,259 INFO L82 PathProgramCache]: Analyzing trace with hash 362962816, now seen corresponding path program 1 times [2019-10-13 21:38:58,259 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:58,259 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101824671] [2019-10-13 21:38:58,259 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:58,260 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:58,260 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:58,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:38:58,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:38:58,319 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101824671] [2019-10-13 21:38:58,319 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:38:58,319 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 21:38:58,320 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098106605] [2019-10-13 21:38:58,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 21:38:58,323 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:38:58,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 21:38:58,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:38:58,324 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 3 states. [2019-10-13 21:38:58,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:38:58,350 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2019-10-13 21:38:58,354 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 21:38:58,354 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-10-13 21:38:58,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:38:58,355 INFO L225 Difference]: With dead ends: 31 [2019-10-13 21:38:58,355 INFO L226 Difference]: Without dead ends: 20 [2019-10-13 21:38:58,357 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 21:38:58,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-13 21:38:58,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-13 21:38:58,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 21:38:58,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-10-13 21:38:58,366 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-10-13 21:38:58,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:38:58,366 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-10-13 21:38:58,366 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 21:38:58,367 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-10-13 21:38:58,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 21:38:58,367 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:58,368 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:58,368 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:58,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:58,368 INFO L82 PathProgramCache]: Analyzing trace with hash -561578652, now seen corresponding path program 1 times [2019-10-13 21:38:58,369 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:58,369 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565332637] [2019-10-13 21:38:58,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:58,369 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:58,369 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:58,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:38:58,429 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:38:58,429 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565332637] [2019-10-13 21:38:58,430 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802222461] [2019-10-13 21:38:58,430 INFO L94 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 -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 [2019-10-13 21:38:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:38:58,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:38:58,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:38:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:38:58,533 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:38:58,574 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:38:58,574 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [785891877] [2019-10-13 21:38:58,604 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-13 21:38:58,604 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:38:58,611 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:38:58,619 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:38:58,620 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:38:58,862 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 27 for LOIs [2019-10-13 21:38:59,345 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 21:39:00,110 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2019-10-13 21:39:00,163 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-13 21:39:00,171 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:39:00,171 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:39:00,172 INFO L193 IcfgInterpreter]: Reachable states at location L11 satisfy 38#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= |old(~CELLCOUNT~0)| 0) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 |old(~CELLCOUNT~0)|) (<= ~CELLCOUNT~0 2147483647) (= |#valid| |old(#valid)|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (<= 0 (+ ~CELLCOUNT~0 2147483648)) (= |old(~CELLCOUNT~0)| 0) (= |old(#length)| |#length|)) [2019-10-13 21:39:00,173 INFO L193 IcfgInterpreter]: Reachable states at location L3-1 satisfy 257#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (<= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 |#NULL.base|) (<= 0 __VERIFIER_assert_~cond) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:39:00,173 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 266#(and (= |old(~CELLCOUNT~0)| ~CELLCOUNT~0) (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:39:00,173 INFO L193 IcfgInterpreter]: Reachable states at location L37-3 satisfy 223#(and (<= 0 main_~i~0) (<= main_~i~0 0) (and (= |#NULL.base| 0) (<= |main_~#volArray~0.offset| 0) (<= 1 ~CELLCOUNT~0) (<= 2 main_~MINVAL~0) (= main_~MINVAL~0 2) (<= |#NULL.base| 0) (<= 0 |main_~#volArray~0.offset|) (= |main_~#volArray~0.offset| 0) (<= 0 |#NULL.base|) (<= |old(~CELLCOUNT~0)| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 |old(~CELLCOUNT~0)|) (<= ~CELLCOUNT~0 2147483647) (= |#NULL.offset| 0) (= |old(~CELLCOUNT~0)| 0) (= main_~i~0 0)) (<= main_~MINVAL~0 2)) [2019-10-13 21:39:00,174 INFO L193 IcfgInterpreter]: Reachable states at location L3 satisfy 252#(and (or (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (or (and (<= 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (<= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 |#NULL.base|) (<= 0 __VERIFIER_assert_~cond) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (<= 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (<= |#NULL.base| 0) (<= 1 __VERIFIER_assert_~cond) (<= 0 |#NULL.base|) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) [2019-10-13 21:39:00,174 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 262#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (<= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 |#NULL.base|) (<= 0 __VERIFIER_assert_~cond) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:39:00,175 INFO L193 IcfgInterpreter]: Reachable states at location L39-2 satisfy 232#(and (<= |main_~#volArray~0.offset| 0) (<= 1 ~CELLCOUNT~0) (<= 0 main_~i~0) (<= 2 main_~MINVAL~0) (<= |#NULL.base| 0) (<= 0 |main_~#volArray~0.offset|) (<= 0 |#NULL.base|) (<= |old(~CELLCOUNT~0)| 0) (<= main_~i~0 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 |old(~CELLCOUNT~0)|) (<= ~CELLCOUNT~0 2147483647) (<= main_~MINVAL~0 2)) [2019-10-13 21:39:00,176 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= ~CELLCOUNT~0 0) (<= ~CELLCOUNT~0 0) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 ~CELLCOUNT~0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:39:00,176 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= |old(~CELLCOUNT~0)| 0) (<= 0 ~CELLCOUNT~0) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 |old(~CELLCOUNT~0)|) (= |old(~CELLCOUNT~0)| ~CELLCOUNT~0) (<= ~CELLCOUNT~0 0) (= |#valid| |old(#valid)|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(~CELLCOUNT~0)| 0) (= |old(#length)| |#length|)) [2019-10-13 21:39:00,176 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 271#(and (= ~CELLCOUNT~0 0) (= |#valid| (store |old(#valid)| 0 0)) (<= ~CELLCOUNT~0 0) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 ~CELLCOUNT~0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:39:00,176 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:39:00,177 INFO L193 IcfgInterpreter]: Reachable states at location L18 satisfy 43#(and (<= |main_~#volArray~0.offset| 0) (= 0 |#NULL.base|) (<= 0 |main_~#volArray~0.offset|) (= |main_~#volArray~0.offset| 0) (<= 0 |#NULL.base|) (<= 0 |#NULL.offset|) (<= 0 |old(~CELLCOUNT~0)|) (= 2 main_~MINVAL~0) (= (store |old(#length)| |main_~#volArray~0.base| (* ~CELLCOUNT~0 4)) |#length|) (not (= |main_~#volArray~0.base| 0)) (= |#valid| (store |old(#valid)| |main_~#volArray~0.base| 1)) (<= main_~MINVAL~0 2) (<= 1 ~CELLCOUNT~0) (<= 2 main_~MINVAL~0) (<= |#NULL.base| 0) (<= |old(~CELLCOUNT~0)| 0) (< |main_~#volArray~0.base| |#StackHeapBarrier|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (< 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= 0 (select |old(#valid)| |main_~#volArray~0.base|)) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (<= 0 (+ ~CELLCOUNT~0 2147483648)) (= |old(~CELLCOUNT~0)| 0)) [2019-10-13 21:39:00,177 INFO L193 IcfgInterpreter]: Reachable states at location L22-3 satisfy 206#(and (or (<= main_~j~0 1) (and (<= 1 main_~i~0) (<= main_~i~0 1))) (or (and (<= |main_~#volArray~0.offset| 0) (= 0 |#NULL.base|) (<= 0 |main_~#volArray~0.offset|) (= |main_~#volArray~0.offset| 0) (<= 0 |#NULL.base|) (not (= (ite (= (ite (and (< ~CELLCOUNT~0 0) (not (= (mod ~CELLCOUNT~0 4) 0))) (+ (mod ~CELLCOUNT~0 4) (- 4)) (mod ~CELLCOUNT~0 4)) 0) 1 0) 0)) (<= 0 |#NULL.offset|) (<= 0 |old(~CELLCOUNT~0)|) (= 2 main_~MINVAL~0) (= (store |old(#length)| |main_~#volArray~0.base| (* ~CELLCOUNT~0 4)) |#length|) (not (= |main_~#volArray~0.base| 0)) (<= 1 main_~i~0) (= |#valid| (store |old(#valid)| |main_~#volArray~0.base| 1)) (<= main_~MINVAL~0 2) (<= main_~i~0 1) (<= 1 ~CELLCOUNT~0) (<= 2 main_~MINVAL~0) (<= |#NULL.base| 0) (= main_~i~0 1) (<= |old(~CELLCOUNT~0)| 0) (< |main_~#volArray~0.base| |#StackHeapBarrier|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (< 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= 0 (select |old(#valid)| |main_~#volArray~0.base|)) (= (ite (and (< ~CELLCOUNT~0 0) (not (= (mod ~CELLCOUNT~0 4) 0))) (+ (mod ~CELLCOUNT~0 4) (- 4)) (mod ~CELLCOUNT~0 4)) 0) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (<= 0 (+ ~CELLCOUNT~0 2147483648)) (= |old(~CELLCOUNT~0)| 0)) (and (= |#NULL.base| 0) (<= |main_~#volArray~0.offset| 0) (<= 1 ~CELLCOUNT~0) (<= 2 main_~i~0) (<= 2 main_~MINVAL~0) (= main_~MINVAL~0 2) (<= |#NULL.base| 0) (<= 0 |main_~#volArray~0.offset|) (= |main_~#volArray~0.offset| 0) (not (<= 1 main_~j~0)) (<= 0 |#NULL.base|) (<= |old(~CELLCOUNT~0)| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 |old(~CELLCOUNT~0)|) (<= ~CELLCOUNT~0 2147483647) (<= main_~MINVAL~0 2) (<= main_~j~0 4) (= |#NULL.offset| 0) (= |old(~CELLCOUNT~0)| 0)))) [2019-10-13 21:39:00,177 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 247#(and (or (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0)) (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (<= 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (<= 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) [2019-10-13 21:39:00,178 INFO L193 IcfgInterpreter]: Reachable states at location L24-3 satisfy 201#(and (or (and (= |#NULL.base| 0) (<= |main_~#volArray~0.offset| 0) (<= 1 ~CELLCOUNT~0) (<= 2 main_~MINVAL~0) (= main_~MINVAL~0 2) (<= |#NULL.base| 0) (<= 0 |main_~#volArray~0.offset|) (= |main_~#volArray~0.offset| 0) (<= 0 |#NULL.base|) (<= |old(~CELLCOUNT~0)| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 |old(~CELLCOUNT~0)|) (= |#NULL.offset| 0) (= |old(~CELLCOUNT~0)| 0)) (and (<= |main_~#volArray~0.offset| 0) (<= 4 main_~j~0) (= 0 |#NULL.base|) (<= 0 |main_~#volArray~0.offset|) (= |main_~#volArray~0.offset| 0) (<= 0 |#NULL.base|) (not (= (ite (= (ite (and (< ~CELLCOUNT~0 0) (not (= (mod ~CELLCOUNT~0 4) 0))) (+ (mod ~CELLCOUNT~0 4) (- 4)) (mod ~CELLCOUNT~0 4)) 0) 1 0) 0)) (= main_~j~0 4) (<= 0 |#NULL.offset|) (<= 0 |old(~CELLCOUNT~0)|) (= 2 main_~MINVAL~0) (= (store |old(#length)| |main_~#volArray~0.base| (* ~CELLCOUNT~0 4)) |#length|) (not (= |main_~#volArray~0.base| 0)) (= |#valid| (store |old(#valid)| |main_~#volArray~0.base| 1)) (<= main_~i~0 1) (<= 1 ~CELLCOUNT~0) (<= main_~i~0 (ite (and (< ~CELLCOUNT~0 0) (not (= (mod ~CELLCOUNT~0 4) 0))) (+ (div ~CELLCOUNT~0 4) 1) (div ~CELLCOUNT~0 4))) (<= 2 main_~MINVAL~0) (<= |#NULL.base| 0) (= main_~i~0 1) (<= |old(~CELLCOUNT~0)| 0) (< |main_~#volArray~0.base| |#StackHeapBarrier|) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (< 1 ~CELLCOUNT~0) (= 0 (select |old(#valid)| |main_~#volArray~0.base|)) (= (ite (and (< ~CELLCOUNT~0 0) (not (= (mod ~CELLCOUNT~0 4) 0))) (+ (mod ~CELLCOUNT~0 4) (- 4)) (mod ~CELLCOUNT~0 4)) 0) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (<= 0 (+ ~CELLCOUNT~0 2147483648)) (= |old(~CELLCOUNT~0)| 0))) (<= ~CELLCOUNT~0 2147483647) (<= 1 main_~i~0) (<= main_~MINVAL~0 2) (<= main_~j~0 4)) [2019-10-13 21:39:00,902 WARN L191 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2019-10-13 21:39:01,402 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:39:01,402 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 12] total 18 [2019-10-13 21:39:01,403 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889909865] [2019-10-13 21:39:01,404 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 21:39:01,409 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:39:01,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 21:39:01,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2019-10-13 21:39:01,411 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 18 states. [2019-10-13 21:39:01,753 WARN L191 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2019-10-13 21:39:02,221 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2019-10-13 21:39:02,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:39:02,631 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2019-10-13 21:39:02,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 21:39:02,631 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 16 [2019-10-13 21:39:02,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:39:02,632 INFO L225 Difference]: With dead ends: 45 [2019-10-13 21:39:02,632 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 21:39:02,634 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2019-10-13 21:39:02,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 21:39:02,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 23. [2019-10-13 21:39:02,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-13 21:39:02,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-10-13 21:39:02,642 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 16 [2019-10-13 21:39:02,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:39:02,643 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-10-13 21:39:02,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 21:39:02,643 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-10-13 21:39:02,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 21:39:02,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:39:02,644 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:39:02,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:39:02,852 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:39:02,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:39:02,852 INFO L82 PathProgramCache]: Analyzing trace with hash 2026682496, now seen corresponding path program 2 times [2019-10-13 21:39:02,852 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:39:02,853 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541437459] [2019-10-13 21:39:02,853 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:02,853 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:02,853 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:39:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:39:03,409 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:39:03,409 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541437459] [2019-10-13 21:39:03,410 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515749919] [2019-10-13 21:39:03,410 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2019-10-13 21:39:03,478 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-13 21:39:03,478 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:39:03,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 30 conjunts are in the unsatisfiable core [2019-10-13 21:39:03,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:39:03,591 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 21:39:04,045 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 44 [2019-10-13 21:39:04,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:39:04,468 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:39:05,003 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 20 [2019-10-13 21:39:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:39:05,139 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1000883191] [2019-10-13 21:39:05,141 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-13 21:39:05,142 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:39:05,142 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:39:05,143 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:39:05,143 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:39:05,189 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 25 for LOIs [2019-10-13 21:39:05,594 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 21:39:06,383 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 17 for LOIs [2019-10-13 21:39:06,433 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 13 for LOIs [2019-10-13 21:39:06,439 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:39:06,439 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:39:06,440 INFO L193 IcfgInterpreter]: Reachable states at location L11 satisfy 38#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= |old(~CELLCOUNT~0)| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= 0 (select |old(#valid)| 0)) (<= 0 |old(~CELLCOUNT~0)|) (<= ~CELLCOUNT~0 2147483647) (= |#valid| |old(#valid)|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (<= 0 (+ ~CELLCOUNT~0 2147483648)) (= |old(~CELLCOUNT~0)| 0) (= |old(#length)| |#length|)) [2019-10-13 21:39:06,440 INFO L193 IcfgInterpreter]: Reachable states at location L3-1 satisfy 257#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (<= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 |#NULL.base|) (<= 0 __VERIFIER_assert_~cond) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:39:06,441 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 266#(and (= |old(~CELLCOUNT~0)| ~CELLCOUNT~0) (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:39:06,441 INFO L193 IcfgInterpreter]: Reachable states at location L37-3 satisfy 223#(and (<= 0 main_~i~0) (<= main_~i~0 0) (and (= |#NULL.base| 0) (<= |main_~#volArray~0.offset| 0) (<= 1 ~CELLCOUNT~0) (<= 2 main_~MINVAL~0) (= main_~MINVAL~0 2) (<= |#NULL.base| 0) (<= 0 |main_~#volArray~0.offset|) (= |main_~#volArray~0.offset| 0) (<= 0 |#NULL.base|) (<= |old(~CELLCOUNT~0)| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 |old(~CELLCOUNT~0)|) (<= ~CELLCOUNT~0 2147483647) (= |#NULL.offset| 0) (= |old(~CELLCOUNT~0)| 0) (= main_~i~0 0)) (<= main_~MINVAL~0 2)) [2019-10-13 21:39:06,441 INFO L193 IcfgInterpreter]: Reachable states at location L3 satisfy 252#(and (or (and (= |__VERIFIER_assert_#in~cond| 1) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 0) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (or (and (<= 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (<= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 |#NULL.base|) (<= 0 __VERIFIER_assert_~cond) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (<= 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (<= |#NULL.base| 0) (<= 1 __VERIFIER_assert_~cond) (<= 0 |#NULL.base|) (<= 1 |__VERIFIER_assert_#in~cond|) (<= __VERIFIER_assert_~cond 1) (<= |__VERIFIER_assert_#in~cond| 1) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) [2019-10-13 21:39:06,442 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 262#(and (or (and (= |__VERIFIER_assert_#in~cond| 0) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) (and (= |__VERIFIER_assert_#in~cond| 1) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond))) (<= 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (<= __VERIFIER_assert_~cond 0) (<= |#NULL.base| 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 |#NULL.base|) (<= 0 __VERIFIER_assert_~cond) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:39:06,442 INFO L193 IcfgInterpreter]: Reachable states at location L39-2 satisfy 232#(and (<= |main_~#volArray~0.offset| 0) (<= 1 ~CELLCOUNT~0) (<= 0 main_~i~0) (<= 2 main_~MINVAL~0) (<= |#NULL.base| 0) (<= 0 |main_~#volArray~0.offset|) (<= 0 |#NULL.base|) (<= |old(~CELLCOUNT~0)| 0) (<= main_~i~0 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 |old(~CELLCOUNT~0)|) (<= ~CELLCOUNT~0 2147483647) (<= main_~MINVAL~0 2)) [2019-10-13 21:39:06,443 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= ~CELLCOUNT~0 0) (<= ~CELLCOUNT~0 0) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 ~CELLCOUNT~0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:39:06,443 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= |old(~CELLCOUNT~0)| 0) (<= 0 ~CELLCOUNT~0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= 0 (select |old(#valid)| 0)) (<= 0 |old(~CELLCOUNT~0)|) (= |old(~CELLCOUNT~0)| ~CELLCOUNT~0) (<= ~CELLCOUNT~0 0) (= |#valid| |old(#valid)|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(~CELLCOUNT~0)| 0) (= |old(#length)| |#length|)) [2019-10-13 21:39:06,443 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 271#(and (= ~CELLCOUNT~0 0) (= |#valid| (store |old(#valid)| 0 0)) (<= ~CELLCOUNT~0 0) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 ~CELLCOUNT~0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:39:06,444 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:39:06,444 INFO L193 IcfgInterpreter]: Reachable states at location L18 satisfy 43#(and (<= |main_~#volArray~0.offset| 0) (= 0 |#NULL.base|) (<= 0 |main_~#volArray~0.offset|) (= |main_~#volArray~0.offset| 0) (<= 0 |#NULL.base|) (<= 0 |#NULL.offset|) (<= 0 |old(~CELLCOUNT~0)|) (= 2 main_~MINVAL~0) (= (store |old(#length)| |main_~#volArray~0.base| (* ~CELLCOUNT~0 4)) |#length|) (not (= |main_~#volArray~0.base| 0)) (= |#valid| (store |old(#valid)| |main_~#volArray~0.base| 1)) (<= main_~MINVAL~0 2) (<= 1 ~CELLCOUNT~0) (<= 2 main_~MINVAL~0) (<= |#NULL.base| 0) (<= |old(~CELLCOUNT~0)| 0) (< |main_~#volArray~0.base| |#StackHeapBarrier|) (<= |#NULL.offset| 0) (= 0 (select |old(#valid)| 0)) (< 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= 0 (select |old(#valid)| |main_~#volArray~0.base|)) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (<= 0 (+ ~CELLCOUNT~0 2147483648)) (= |old(~CELLCOUNT~0)| 0)) [2019-10-13 21:39:06,445 INFO L193 IcfgInterpreter]: Reachable states at location L22-3 satisfy 206#(and (or (<= main_~j~0 1) (and (<= 1 main_~i~0) (<= main_~i~0 1))) (or (and (<= |main_~#volArray~0.offset| 0) (= 0 |#NULL.base|) (<= 0 |main_~#volArray~0.offset|) (= |main_~#volArray~0.offset| 0) (<= 0 |#NULL.base|) (not (= (ite (= (ite (and (< ~CELLCOUNT~0 0) (not (= (mod ~CELLCOUNT~0 4) 0))) (+ (mod ~CELLCOUNT~0 4) (- 4)) (mod ~CELLCOUNT~0 4)) 0) 1 0) 0)) (<= 0 |#NULL.offset|) (<= 0 |old(~CELLCOUNT~0)|) (= 2 main_~MINVAL~0) (= (store |old(#length)| |main_~#volArray~0.base| (* ~CELLCOUNT~0 4)) |#length|) (not (= |main_~#volArray~0.base| 0)) (<= 1 main_~i~0) (= |#valid| (store |old(#valid)| |main_~#volArray~0.base| 1)) (<= main_~MINVAL~0 2) (<= main_~i~0 1) (<= 1 ~CELLCOUNT~0) (<= 2 main_~MINVAL~0) (<= |#NULL.base| 0) (= main_~i~0 1) (<= |old(~CELLCOUNT~0)| 0) (< |main_~#volArray~0.base| |#StackHeapBarrier|) (<= |#NULL.offset| 0) (= 0 (select |old(#valid)| 0)) (< 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= 0 (select |old(#valid)| |main_~#volArray~0.base|)) (= (ite (and (< ~CELLCOUNT~0 0) (not (= (mod ~CELLCOUNT~0 4) 0))) (+ (mod ~CELLCOUNT~0 4) (- 4)) (mod ~CELLCOUNT~0 4)) 0) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (<= 0 (+ ~CELLCOUNT~0 2147483648)) (= |old(~CELLCOUNT~0)| 0)) (and (= |#NULL.base| 0) (<= |main_~#volArray~0.offset| 0) (<= 1 ~CELLCOUNT~0) (<= 2 main_~i~0) (<= 2 main_~MINVAL~0) (= main_~MINVAL~0 2) (<= |#NULL.base| 0) (<= 0 |main_~#volArray~0.offset|) (= |main_~#volArray~0.offset| 0) (not (<= 1 main_~j~0)) (<= 0 |#NULL.base|) (<= |old(~CELLCOUNT~0)| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 |old(~CELLCOUNT~0)|) (<= ~CELLCOUNT~0 2147483647) (<= main_~MINVAL~0 2) (<= main_~j~0 4) (= |#NULL.offset| 0) (= |old(~CELLCOUNT~0)| 0)))) [2019-10-13 21:39:06,445 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 247#(and (or (and (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0)) (and (<= 1 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 1))) (or (and (<= 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (<= 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) [2019-10-13 21:39:06,446 INFO L193 IcfgInterpreter]: Reachable states at location L24-3 satisfy 201#(and (or (and (= |#NULL.base| 0) (<= |main_~#volArray~0.offset| 0) (<= 1 ~CELLCOUNT~0) (<= 2 main_~MINVAL~0) (= main_~MINVAL~0 2) (<= |#NULL.base| 0) (<= 0 |main_~#volArray~0.offset|) (= |main_~#volArray~0.offset| 0) (<= 0 |#NULL.base|) (<= |old(~CELLCOUNT~0)| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 |old(~CELLCOUNT~0)|) (<= ~CELLCOUNT~0 2147483647) (<= 1 main_~i~0) (<= main_~MINVAL~0 2) (= |#NULL.offset| 0) (= |old(~CELLCOUNT~0)| 0)) (and (<= |main_~#volArray~0.offset| 0) (<= 4 main_~j~0) (= 0 |#NULL.base|) (<= 0 |main_~#volArray~0.offset|) (= |main_~#volArray~0.offset| 0) (<= 0 |#NULL.base|) (not (= (ite (= (ite (and (< ~CELLCOUNT~0 0) (not (= (mod ~CELLCOUNT~0 4) 0))) (+ (mod ~CELLCOUNT~0 4) (- 4)) (mod ~CELLCOUNT~0 4)) 0) 1 0) 0)) (= main_~j~0 4) (<= 0 |#NULL.offset|) (<= 0 |old(~CELLCOUNT~0)|) (= 2 main_~MINVAL~0) (= (store |old(#length)| |main_~#volArray~0.base| (* ~CELLCOUNT~0 4)) |#length|) (not (= |main_~#volArray~0.base| 0)) (<= 1 main_~i~0) (= |#valid| (store |old(#valid)| |main_~#volArray~0.base| 1)) (<= main_~MINVAL~0 2) (<= main_~i~0 1) (<= 1 ~CELLCOUNT~0) (<= main_~i~0 (ite (and (< ~CELLCOUNT~0 0) (not (= (mod ~CELLCOUNT~0 4) 0))) (+ (div ~CELLCOUNT~0 4) 1) (div ~CELLCOUNT~0 4))) (<= 2 main_~MINVAL~0) (<= |#NULL.base| 0) (= main_~i~0 1) (<= |old(~CELLCOUNT~0)| 0) (< |main_~#volArray~0.base| |#StackHeapBarrier|) (<= |#NULL.offset| 0) (= 0 (select |old(#valid)| 0)) (< 1 ~CELLCOUNT~0) (<= ~CELLCOUNT~0 2147483647) (= 0 (select |old(#valid)| |main_~#volArray~0.base|)) (= (ite (and (< ~CELLCOUNT~0 0) (not (= (mod ~CELLCOUNT~0 4) 0))) (+ (mod ~CELLCOUNT~0 4) (- 4)) (mod ~CELLCOUNT~0 4)) 0) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (<= 0 (+ ~CELLCOUNT~0 2147483648)) (= |old(~CELLCOUNT~0)| 0))) (<= main_~j~0 4)) [2019-10-13 21:39:07,256 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 42 [2019-10-13 21:39:07,597 WARN L191 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2019-10-13 21:39:08,236 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2019-10-13 21:39:08,237 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 12, 12] total 41 [2019-10-13 21:39:08,237 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982960866] [2019-10-13 21:39:08,238 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-13 21:39:08,238 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:39:08,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-13 21:39:08,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1449, Unknown=0, NotChecked=0, Total=1640 [2019-10-13 21:39:08,240 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 41 states. [2019-10-13 21:39:08,569 WARN L191 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2019-10-13 21:39:08,801 WARN L191 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 57 [2019-10-13 21:39:09,309 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 66 [2019-10-13 21:39:09,621 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 61 [2019-10-13 21:39:10,096 WARN L191 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 96 [2019-10-13 21:39:10,349 WARN L191 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 63 [2019-10-13 21:39:10,572 WARN L191 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2019-10-13 21:39:10,817 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 74 [2019-10-13 21:39:11,012 WARN L191 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 56 [2019-10-13 21:39:13,557 WARN L191 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 66 [2019-10-13 21:39:14,073 WARN L191 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2019-10-13 21:39:14,301 WARN L191 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2019-10-13 21:39:14,660 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2019-10-13 21:39:15,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:39:15,325 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2019-10-13 21:39:15,325 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-13 21:39:15,325 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 19 [2019-10-13 21:39:15,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:39:15,328 INFO L225 Difference]: With dead ends: 62 [2019-10-13 21:39:15,328 INFO L226 Difference]: Without dead ends: 60 [2019-10-13 21:39:15,331 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=603, Invalid=4227, Unknown=0, NotChecked=0, Total=4830 [2019-10-13 21:39:15,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-13 21:39:15,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 47. [2019-10-13 21:39:15,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 21:39:15,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 53 transitions. [2019-10-13 21:39:15,351 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 53 transitions. Word has length 19 [2019-10-13 21:39:15,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:39:15,351 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 53 transitions. [2019-10-13 21:39:15,351 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-13 21:39:15,351 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 53 transitions. [2019-10-13 21:39:15,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 21:39:15,353 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:39:15,354 INFO L380 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:39:15,557 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:39:15,558 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:39:15,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:39:15,559 INFO L82 PathProgramCache]: Analyzing trace with hash 266885692, now seen corresponding path program 1 times [2019-10-13 21:39:15,560 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:39:15,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977806147] [2019-10-13 21:39:15,561 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:15,561 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:39:15,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:39:15,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:39:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:39:16,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977806147] [2019-10-13 21:39:16,390 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468257618] [2019-10-13 21:39:16,390 INFO L94 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 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:39:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:39:16,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-13 21:39:16,468 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:39:16,594 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 21:39:16,738 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 21:39:17,033 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 21:39:17,235 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 21:39:17,362 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 21:39:17,536 WARN L225 Elim1Store]: Array PQE input equivalent to false [2019-10-13 21:39:20,184 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 21:39:20,184 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:39:36,773 WARN L191 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 39