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 --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_m2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:52:53,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:52:53,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:52:53,868 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:52:53,869 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:52:53,871 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:52:53,873 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:52:53,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:52:53,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:52:53,881 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:52:53,882 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:52:53,883 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:52:53,884 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:52:53,886 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:52:53,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:52:53,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:52:53,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:52:53,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:52:53,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:52:53,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:52:53,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:52:53,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:52:53,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:52:53,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:52:53,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-13 19:52:53,915 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-13 19:52:53,915 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-13 19:52:53,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-13 19:52:53,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-13 19:52:53,922 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-13 19:52:53,922 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:52:53,924 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:52:53,925 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:52:53,926 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:52:53,927 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:52:53,930 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:52:53,931 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:52:53,931 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:52:53,931 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:52:53,932 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:52:53,933 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:52:53,933 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 19:52:53,954 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:52:53,954 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:52:53,955 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:52:53,956 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:52:53,956 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:52:53,956 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:52:53,956 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:52:53,957 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:52:53,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:52:53,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:52:53,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:52:53,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:52:53,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:52:53,958 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:52:53,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:52:53,958 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:52:53,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:52:53,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:52:53,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:52:53,959 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:52:53,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:52:53,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:52:53,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:52:53,961 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:52:53,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:52:53,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:52:53,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:52:53,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:52:53,962 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-13 19:52:54,286 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:52:54,299 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:52:54,303 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:52:54,305 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:52:54,305 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:52:54,306 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2019-10-13 19:52:54,384 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6a6e10b3/8388b17097174f68af90b07064f0b89d/FLAG99f84e799 [2019-10-13 19:52:54,837 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:52:54,837 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_m2.c [2019-10-13 19:52:54,843 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6a6e10b3/8388b17097174f68af90b07064f0b89d/FLAG99f84e799 [2019-10-13 19:52:55,205 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6a6e10b3/8388b17097174f68af90b07064f0b89d [2019-10-13 19:52:55,215 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:52:55,216 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:52:55,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:52:55,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:52:55,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:52:55,222 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:52:55" (1/1) ... [2019-10-13 19:52:55,225 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32833bd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:55, skipping insertion in model container [2019-10-13 19:52:55,225 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:52:55" (1/1) ... [2019-10-13 19:52:55,233 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:52:55,251 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:52:55,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:52:55,419 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:52:55,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:52:55,465 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:52:55,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:55 WrapperNode [2019-10-13 19:52:55,466 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:52:55,467 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:52:55,467 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:52:55,467 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:52:55,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:55" (1/1) ... [2019-10-13 19:52:55,561 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:55" (1/1) ... [2019-10-13 19:52:55,570 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:55" (1/1) ... [2019-10-13 19:52:55,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:55" (1/1) ... [2019-10-13 19:52:55,577 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:55" (1/1) ... [2019-10-13 19:52:55,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:55" (1/1) ... [2019-10-13 19:52:55,585 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:55" (1/1) ... [2019-10-13 19:52:55,588 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:52:55,588 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:52:55,588 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:52:55,588 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:52:55,589 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:55" (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 19:52:55,650 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:52:55,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:52:55,651 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 19:52:55,651 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:52:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:52:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:52:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:52:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2019-10-13 19:52:55,651 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:52:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 19:52:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 19:52:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 19:52:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 19:52:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:52:55,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:52:55,961 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:52:55,961 INFO L284 CfgBuilder]: Removed 5 assume(true) statements. [2019-10-13 19:52:55,963 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:52:55 BoogieIcfgContainer [2019-10-13 19:52:55,963 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:52:55,964 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:52:55,964 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:52:55,967 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:52:55,968 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:52:55" (1/3) ... [2019-10-13 19:52:55,968 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16bc9dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:52:55, skipping insertion in model container [2019-10-13 19:52:55,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:52:55" (2/3) ... [2019-10-13 19:52:55,969 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16bc9dc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:52:55, skipping insertion in model container [2019-10-13 19:52:55,969 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:52:55" (3/3) ... [2019-10-13 19:52:55,971 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_m2.c [2019-10-13 19:52:55,978 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:52:55,985 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:52:55,997 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:52:56,025 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:52:56,025 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:52:56,025 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:52:56,026 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:52:56,026 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:52:56,026 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:52:56,026 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:52:56,026 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:52:56,047 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2019-10-13 19:52:56,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 19:52:56,056 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:52:56,057 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:52:56,058 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:52:56,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:52:56,063 INFO L82 PathProgramCache]: Analyzing trace with hash -286857817, now seen corresponding path program 1 times [2019-10-13 19:52:56,070 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:52:56,071 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169495118] [2019-10-13 19:52:56,071 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:56,071 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:56,071 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:52:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:52:56,223 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 19:52:56,224 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169495118] [2019-10-13 19:52:56,225 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:52:56,225 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-10-13 19:52:56,225 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168683399] [2019-10-13 19:52:56,229 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-10-13 19:52:56,231 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:52:56,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-10-13 19:52:56,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:52:56,248 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 2 states. [2019-10-13 19:52:56,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:52:56,275 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2019-10-13 19:52:56,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-10-13 19:52:56,277 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 20 [2019-10-13 19:52:56,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:52:56,286 INFO L225 Difference]: With dead ends: 59 [2019-10-13 19:52:56,286 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 19:52:56,290 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-10-13 19:52:56,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 19:52:56,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-13 19:52:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 19:52:56,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-10-13 19:52:56,332 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 20 [2019-10-13 19:52:56,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:52:56,333 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-10-13 19:52:56,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-10-13 19:52:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-10-13 19:52:56,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 19:52:56,335 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:52:56,335 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:52:56,336 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:52:56,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:52:56,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1625158677, now seen corresponding path program 1 times [2019-10-13 19:52:56,337 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:52:56,337 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056921173] [2019-10-13 19:52:56,337 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:56,338 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:56,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:52:56,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:52:56,439 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 19:52:56,440 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056921173] [2019-10-13 19:52:56,440 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:52:56,440 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-13 19:52:56,441 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471222989] [2019-10-13 19:52:56,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-13 19:52:56,443 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:52:56,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-13 19:52:56,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-13 19:52:56,444 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 5 states. [2019-10-13 19:52:56,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:52:56,509 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2019-10-13 19:52:56,510 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 19:52:56,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-10-13 19:52:56,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:52:56,511 INFO L225 Difference]: With dead ends: 38 [2019-10-13 19:52:56,512 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 19:52:56,513 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:52:56,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 19:52:56,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-13 19:52:56,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 19:52:56,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-10-13 19:52:56,522 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 20 [2019-10-13 19:52:56,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:52:56,522 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-10-13 19:52:56,523 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-13 19:52:56,523 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-10-13 19:52:56,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 19:52:56,524 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:52:56,524 INFO L380 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] [2019-10-13 19:52:56,524 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:52:56,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:52:56,525 INFO L82 PathProgramCache]: Analyzing trace with hash -573455021, now seen corresponding path program 1 times [2019-10-13 19:52:56,525 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:52:56,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465056836] [2019-10-13 19:52:56,526 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:56,526 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:56,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:52:56,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:52:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 19:52:56,581 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465056836] [2019-10-13 19:52:56,581 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:52:56,581 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-13 19:52:56,582 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076366489] [2019-10-13 19:52:56,582 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:52:56,583 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:52:56,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:52:56,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:52:56,584 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 3 states. [2019-10-13 19:52:56,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:52:56,626 INFO L93 Difference]: Finished difference Result 59 states and 73 transitions. [2019-10-13 19:52:56,627 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:52:56,627 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2019-10-13 19:52:56,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:52:56,628 INFO L225 Difference]: With dead ends: 59 [2019-10-13 19:52:56,628 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 19:52:56,629 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 19:52:56,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 19:52:56,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-13 19:52:56,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 19:52:56,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2019-10-13 19:52:56,637 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 22 [2019-10-13 19:52:56,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:52:56,638 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2019-10-13 19:52:56,638 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:52:56,638 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2019-10-13 19:52:56,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 19:52:56,639 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:52:56,639 INFO L380 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] [2019-10-13 19:52:56,640 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:52:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:52:56,640 INFO L82 PathProgramCache]: Analyzing trace with hash 2038931473, now seen corresponding path program 1 times [2019-10-13 19:52:56,641 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:52:56,641 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265152525] [2019-10-13 19:52:56,641 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:56,641 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:56,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:52:56,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:52:56,713 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-13 19:52:56,714 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265152525] [2019-10-13 19:52:56,715 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:52:56,715 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:52:56,715 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047546606] [2019-10-13 19:52:56,716 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:52:56,716 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-13 19:52:56,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:52:56,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:52:56,717 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 4 states. [2019-10-13 19:52:56,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:52:56,823 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2019-10-13 19:52:56,823 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:52:56,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 24 [2019-10-13 19:52:56,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:52:56,824 INFO L225 Difference]: With dead ends: 54 [2019-10-13 19:52:56,824 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 19:52:56,825 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:52:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 19:52:56,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 31. [2019-10-13 19:52:56,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 19:52:56,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-10-13 19:52:56,833 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 24 [2019-10-13 19:52:56,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:52:56,833 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-10-13 19:52:56,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:52:56,834 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-10-13 19:52:56,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 19:52:56,835 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:52:56,835 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:52:56,835 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:52:56,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:52:56,836 INFO L82 PathProgramCache]: Analyzing trace with hash -2121276981, now seen corresponding path program 1 times [2019-10-13 19:52:56,836 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-13 19:52:56,836 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466813466] [2019-10-13 19:52:56,837 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:56,837 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:52:56,837 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:52:56,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:52:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:52:56,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466813466] [2019-10-13 19:52:56,913 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682999869] [2019-10-13 19:52:56,915 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 19:52:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:52:56,999 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-13 19:52:57,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:52:57,094 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:52:57,094 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 19:52:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-13 19:52:57,157 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [137008677] [2019-10-13 19:52:57,166 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 31 [2019-10-13 19:52:57,232 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-13 19:52:57,232 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-13 19:52:57,305 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-13 19:52:57,307 INFO L272 AbstractInterpreter]: Visited 7 different actions 7 times. Never merged. Never widened. Performed 21 root evaluator evaluations with a maximum evaluation depth of 2. Performed 21 inverse root evaluator evaluations with a maximum inverse evaluation depth of 2. Never found a fixpoint. Largest state had 30 variables. [2019-10-13 19:52:57,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:52:57,310 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-13 19:52:57,351 INFO L227 lantSequenceWeakener]: Weakened 5 states. On average, predicates are now at 96.67% of their original sizes. [2019-10-13 19:52:57,351 INFO L551 sIntCurrentIteration]: Unifying AI predicates [2019-10-13 19:52:57,357 INFO L553 sIntCurrentIteration]: We unified 29 AI predicates to 29 [2019-10-13 19:52:57,357 INFO L562 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-13 19:52:57,358 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2019-10-13 19:52:57,358 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4] total 8 [2019-10-13 19:52:57,358 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385924710] [2019-10-13 19:52:57,359 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-13 19:52:57,360 INFO L137 tionRefinementEngine]: Using predicate unifier AbsIntPredicateUnifier provided by strategy TAIPAN [2019-10-13 19:52:57,360 INFO L124 tionRefinementEngine]: Using hoare triple checker CachingHoareTripleCheckerMap provided by strategy [2019-10-13 19:52:57,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-13 19:52:57,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-13 19:52:57,361 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 3 states. [2019-10-13 19:52:57,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:52:57,364 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2019-10-13 19:52:57,365 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-13 19:52:57,365 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2019-10-13 19:52:57,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:52:57,365 INFO L225 Difference]: With dead ends: 31 [2019-10-13 19:52:57,365 INFO L226 Difference]: Without dead ends: 0 [2019-10-13 19:52:57,366 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 28 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 19:52:57,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2019-10-13 19:52:57,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2019-10-13 19:52:57,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2019-10-13 19:52:57,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2019-10-13 19:52:57,367 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 30 [2019-10-13 19:52:57,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:52:57,367 INFO L462 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2019-10-13 19:52:57,367 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-13 19:52:57,367 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2019-10-13 19:52:57,368 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2019-10-13 19:52:57,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:52:57,578 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2019-10-13 19:52:57,657 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2019-10-13 19:52:57,657 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: true [2019-10-13 19:52:57,657 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2019-10-13 19:52:57,658 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2019-10-13 19:52:57,658 INFO L439 ceAbstractionStarter]: At program point L-1(line -1) the Hoare annotation is: (and (<= 0 (+ ~SIZE~0 32768)) (<= ~SIZE~0 32767)) [2019-10-13 19:52:57,658 INFO L446 ceAbstractionStarter]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2019-10-13 19:52:57,658 INFO L443 ceAbstractionStarter]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2019-10-13 19:52:57,658 INFO L443 ceAbstractionStarter]: For program point L27-2(lines 27 30) no Hoare annotation was computed. [2019-10-13 19:52:57,659 INFO L443 ceAbstractionStarter]: For program point mainEXIT(lines 8 44) no Hoare annotation was computed. [2019-10-13 19:52:57,659 INFO L439 ceAbstractionStarter]: At program point L27-3(lines 27 30) the Hoare annotation is: (or (not (<= 0 (+ |old(~SIZE~0)| 32768))) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,659 INFO L443 ceAbstractionStarter]: For program point L27-4(lines 27 30) no Hoare annotation was computed. [2019-10-13 19:52:57,659 INFO L443 ceAbstractionStarter]: For program point L11(lines 11 42) no Hoare annotation was computed. [2019-10-13 19:52:57,659 INFO L443 ceAbstractionStarter]: For program point L11-2(lines 11 42) no Hoare annotation was computed. [2019-10-13 19:52:57,659 INFO L443 ceAbstractionStarter]: For program point L32-2(lines 32 35) no Hoare annotation was computed. [2019-10-13 19:52:57,660 INFO L439 ceAbstractionStarter]: At program point L32-3(lines 32 35) the Hoare annotation is: (or (not (<= 0 (+ |old(~SIZE~0)| 32768))) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,660 INFO L443 ceAbstractionStarter]: For program point L32-4(lines 32 35) no Hoare annotation was computed. [2019-10-13 19:52:57,660 INFO L443 ceAbstractionStarter]: For program point L41(line 41) no Hoare annotation was computed. [2019-10-13 19:52:57,660 INFO L443 ceAbstractionStarter]: For program point L37-2(lines 37 40) no Hoare annotation was computed. [2019-10-13 19:52:57,660 INFO L439 ceAbstractionStarter]: At program point L37-3(lines 37 40) the Hoare annotation is: (or (not (<= 0 (+ |old(~SIZE~0)| 32768))) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,661 INFO L439 ceAbstractionStarter]: At program point L37-4(lines 37 40) the Hoare annotation is: (or (= main_~sum~0 0) (not (<= 0 (+ |old(~SIZE~0)| 32768))) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,661 INFO L443 ceAbstractionStarter]: For program point L17-2(lines 17 20) no Hoare annotation was computed. [2019-10-13 19:52:57,661 INFO L439 ceAbstractionStarter]: At program point L17-3(lines 17 20) the Hoare annotation is: (or (not (<= 0 (+ |old(~SIZE~0)| 32768))) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,661 INFO L443 ceAbstractionStarter]: For program point L17-4(lines 17 20) no Hoare annotation was computed. [2019-10-13 19:52:57,661 INFO L443 ceAbstractionStarter]: For program point mainFINAL(lines 8 44) no Hoare annotation was computed. [2019-10-13 19:52:57,661 INFO L439 ceAbstractionStarter]: At program point mainENTRY(lines 8 44) the Hoare annotation is: (or (not (<= 0 (+ |old(~SIZE~0)| 32768))) (and (<= 0 (+ ~SIZE~0 32768)) (<= ~SIZE~0 32767)) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,662 INFO L443 ceAbstractionStarter]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2019-10-13 19:52:57,662 INFO L439 ceAbstractionStarter]: At program point L22-3(lines 22 25) the Hoare annotation is: (or (not (<= 0 (+ |old(~SIZE~0)| 32768))) (not (<= |old(~SIZE~0)| 32767))) [2019-10-13 19:52:57,662 INFO L443 ceAbstractionStarter]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2019-10-13 19:52:57,662 INFO L443 ceAbstractionStarter]: For program point L3-3(line 3) no Hoare annotation was computed. [2019-10-13 19:52:57,662 INFO L446 ceAbstractionStarter]: At program point __VERIFIER_assertENTRY(line 3) the Hoare annotation is: true [2019-10-13 19:52:57,662 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertEXIT(line 3) no Hoare annotation was computed. [2019-10-13 19:52:57,663 INFO L443 ceAbstractionStarter]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 3) no Hoare annotation was computed. [2019-10-13 19:52:57,663 INFO L443 ceAbstractionStarter]: For program point L3(line 3) no Hoare annotation was computed. [2019-10-13 19:52:57,663 INFO L443 ceAbstractionStarter]: For program point L3-1(line 3) no Hoare annotation was computed. [2019-10-13 19:52:57,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:52:57 BoogieIcfgContainer [2019-10-13 19:52:57,685 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2019-10-13 19:52:57,690 INFO L168 Benchmark]: Toolchain (without parser) took 2470.82 ms. Allocated memory was 143.7 MB in the beginning and 229.6 MB in the end (delta: 86.0 MB). Free memory was 101.7 MB in the beginning and 176.9 MB in the end (delta: -75.2 MB). Peak memory consumption was 10.8 MB. Max. memory is 7.1 GB. [2019-10-13 19:52:57,693 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 143.7 MB. Free memory was 120.1 MB in the beginning and 119.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-13 19:52:57,695 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.13 ms. Allocated memory is still 143.7 MB. Free memory was 101.5 MB in the beginning and 91.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2019-10-13 19:52:57,696 INFO L168 Benchmark]: Boogie Preprocessor took 121.03 ms. Allocated memory was 143.7 MB in the beginning and 199.8 MB in the end (delta: 56.1 MB). Free memory was 91.2 MB in the beginning and 177.3 MB in the end (delta: -86.2 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2019-10-13 19:52:57,699 INFO L168 Benchmark]: RCFGBuilder took 374.93 ms. Allocated memory is still 199.8 MB. Free memory was 177.3 MB in the beginning and 160.6 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2019-10-13 19:52:57,700 INFO L168 Benchmark]: TraceAbstraction took 1721.14 ms. Allocated memory was 199.8 MB in the beginning and 229.6 MB in the end (delta: 29.9 MB). Free memory was 160.6 MB in the beginning and 176.9 MB in the end (delta: -16.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2019-10-13 19:52:57,705 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 143.7 MB. Free memory was 120.1 MB in the beginning and 119.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 249.13 ms. Allocated memory is still 143.7 MB. Free memory was 101.5 MB in the beginning and 91.2 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 121.03 ms. Allocated memory was 143.7 MB in the beginning and 199.8 MB in the end (delta: 56.1 MB). Free memory was 91.2 MB in the beginning and 177.3 MB in the end (delta: -86.2 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 374.93 ms. Allocated memory is still 199.8 MB. Free memory was 177.3 MB in the beginning and 160.6 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1721.14 ms. Allocated memory was 199.8 MB in the beginning and 229.6 MB in the end (delta: 29.9 MB). Free memory was 160.6 MB in the beginning and 176.9 MB in the end (delta: -16.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 3]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 37]: Loop Invariant Derived loop invariant: !(0 <= \old(SIZE) + 32768) || !(\old(SIZE) <= 32767) - InvariantResult [Line: 32]: Loop Invariant Derived loop invariant: !(0 <= \old(SIZE) + 32768) || !(\old(SIZE) <= 32767) - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: !(0 <= \old(SIZE) + 32768) || !(\old(SIZE) <= 32767) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: !(0 <= \old(SIZE) + 32768) || !(\old(SIZE) <= 32767) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: !(0 <= \old(SIZE) + 32768) || !(\old(SIZE) <= 32767) - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 34 locations, 1 error locations. Result: SAFE, OverallTime: 1.6s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, HoareTripleCheckerStatistics: 114 SDtfs, 35 SDslu, 93 SDs, 0 SdLazy, 69 SolverSat, 11 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 5 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 11 LocationsWithAnnotation, 15 PreInvPairs, 16 NumberOfFragments, 101 HoareAnnotationTreeSize, 15 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 11 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 169 ConstructedInterpolants, 0 QuantifiedInterpolants, 6491 SizeOfPredicates, 3 NumberOfNonLiveVariables, 102 ConjunctsInSsa, 4 ConjunctsInUnsatCore, 7 InterpolantComputations, 4 PerfectInterpolantSequences, 15/18 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: TIME[ms]: 144, ITERATIONS: 1, WAS_STRONG: 1, WEAKENING_RATIO: 0.9655172413793104, AVG_VARS_REMOVED_DURING_WEAKENING: 0.8275862068965517, AVG_WEAKENED_CONJUNCTS: 0.5517241379310345, PDR: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...