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-multidimensional/init-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 21:37:49,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 21:37:49,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 21:37:49,810 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 21:37:49,810 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 21:37:49,811 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 21:37:49,813 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 21:37:49,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 21:37:49,816 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 21:37:49,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 21:37:49,818 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 21:37:49,820 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 21:37:49,820 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 21:37:49,821 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 21:37:49,822 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 21:37:49,823 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 21:37:49,824 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 21:37:49,825 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 21:37:49,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 21:37:49,829 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 21:37:49,831 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 21:37:49,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 21:37:49,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 21:37:49,835 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 21:37:49,839 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 21:37:49,851 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 21:37:49,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 21:37:49,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 21:37:49,857 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 21:37:49,882 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 21:37:49,882 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 21:37:49,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 21:37:49,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 21:37:49,885 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 21:37:49,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 21:37:49,886 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 21:37:49,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 21:37:49,886 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 21:37:49,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 21:37:49,887 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 21:37:49,888 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 21:37:49,888 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 21:37:49,888 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 21:37:49,889 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 21:37:49,889 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 21:37:49,889 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 21:37:49,889 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 21:37:49,890 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 21:37:49,890 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 21:37:49,890 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 21:37:49,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 21:37:49,891 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 21:37:49,891 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 21:37:49,891 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 21:37:49,892 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 21:37:49,892 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 21:37:49,892 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 21:37:49,892 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 21:37:50,202 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 21:37:50,226 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 21:37:50,229 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 21:37:50,231 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 21:37:50,231 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 21:37:50,232 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/init-3-u.c [2019-10-13 21:37:50,317 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/917c431f8/36e1d5eedbbc4fd3a55ce956974bc105/FLAG1132e2877 [2019-10-13 21:37:50,789 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 21:37:50,790 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/init-3-u.c [2019-10-13 21:37:50,797 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/917c431f8/36e1d5eedbbc4fd3a55ce956974bc105/FLAG1132e2877 [2019-10-13 21:37:51,143 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/917c431f8/36e1d5eedbbc4fd3a55ce956974bc105 [2019-10-13 21:37:51,154 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 21:37:51,155 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 21:37:51,156 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 21:37:51,156 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 21:37:51,160 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 21:37:51,161 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:37:51" (1/1) ... [2019-10-13 21:37:51,164 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60587208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:51, skipping insertion in model container [2019-10-13 21:37:51,164 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 09:37:51" (1/1) ... [2019-10-13 21:37:51,172 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 21:37:51,194 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 21:37:51,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:37:51,393 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 21:37:51,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 21:37:51,445 INFO L192 MainTranslator]: Completed translation [2019-10-13 21:37:51,445 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:51 WrapperNode [2019-10-13 21:37:51,446 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 21:37:51,447 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 21:37:51,447 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 21:37:51,447 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 21:37:51,540 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:51" (1/1) ... [2019-10-13 21:37:51,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:51" (1/1) ... [2019-10-13 21:37:51,547 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:51" (1/1) ... [2019-10-13 21:37:51,548 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:51" (1/1) ... [2019-10-13 21:37:51,554 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:51" (1/1) ... [2019-10-13 21:37:51,561 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:51" (1/1) ... [2019-10-13 21:37:51,562 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:51" (1/1) ... [2019-10-13 21:37:51,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 21:37:51,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 21:37:51,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 21:37:51,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 21:37:51,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:51" (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 21:37:51,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 21:37:51,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 21:37:51,622 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-13 21:37:51,622 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 21:37:51,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 21:37:51,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 21:37:51,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 21:37:51,623 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 21:37:51,624 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-13 21:37:51,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-13 21:37:51,624 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-13 21:37:51,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-13 21:37:51,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 21:37:51,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 21:37:51,999 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 21:37:52,000 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-13 21:37:52,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:37:52 BoogieIcfgContainer [2019-10-13 21:37:52,001 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 21:37:52,002 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 21:37:52,002 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 21:37:52,005 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 21:37:52,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 09:37:51" (1/3) ... [2019-10-13 21:37:52,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e296877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:37:52, skipping insertion in model container [2019-10-13 21:37:52,006 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 09:37:51" (2/3) ... [2019-10-13 21:37:52,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e296877 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 09:37:52, skipping insertion in model container [2019-10-13 21:37:52,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 09:37:52" (3/3) ... [2019-10-13 21:37:52,008 INFO L109 eAbstractionObserver]: Analyzing ICFG init-3-u.c [2019-10-13 21:37:52,015 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 21:37:52,021 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 21:37:52,033 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 21:37:52,055 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 21:37:52,055 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 21:37:52,056 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 21:37:52,056 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 21:37:52,056 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 21:37:52,056 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 21:37:52,056 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 21:37:52,056 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 21:37:52,072 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-13 21:37:52,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 21:37:52,077 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:37:52,078 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:37:52,080 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:37:52,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:37:52,085 INFO L82 PathProgramCache]: Analyzing trace with hash 304177849, now seen corresponding path program 1 times [2019-10-13 21:37:52,092 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:37:52,093 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618510181] [2019-10-13 21:37:52,093 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:52,093 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:52,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:37:52,173 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:37:52,174 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1202719617] [2019-10-13 21:37:52,174 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 21:37:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:37:52,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:37:52,248 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:37:52,298 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 21:37:52,299 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:37:52,343 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 21:37:52,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618510181] [2019-10-13 21:37:52,346 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:37:52,346 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202719617] [2019-10-13 21:37:52,347 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:37:52,348 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-13 21:37:52,348 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714910968] [2019-10-13 21:37:52,354 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 21:37:52,354 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:37:52,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 21:37:52,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 21:37:52,374 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-10-13 21:37:52,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:37:52,461 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-10-13 21:37:52,462 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 21:37:52,463 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-13 21:37:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:37:52,473 INFO L225 Difference]: With dead ends: 40 [2019-10-13 21:37:52,473 INFO L226 Difference]: Without dead ends: 23 [2019-10-13 21:37:52,476 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 23 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 21:37:52,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-13 21:37:52,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-13 21:37:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-13 21:37:52,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2019-10-13 21:37:52,519 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 13 [2019-10-13 21:37:52,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:37:52,519 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2019-10-13 21:37:52,519 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 21:37:52,520 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2019-10-13 21:37:52,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 21:37:52,521 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:37:52,521 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:37:52,722 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:37:52,723 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:37:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:37:52,724 INFO L82 PathProgramCache]: Analyzing trace with hash 362677943, now seen corresponding path program 1 times [2019-10-13 21:37:52,724 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:37:52,725 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221959353] [2019-10-13 21:37:52,725 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:52,726 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:52,726 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:37:52,740 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:37:52,741 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [52311883] [2019-10-13 21:37:52,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -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 21:37:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:37:52,786 INFO L256 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:37:52,788 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:37:52,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:37:52,819 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:37:52,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-13 21:37:52,852 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221959353] [2019-10-13 21:37:52,853 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:37:52,853 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52311883] [2019-10-13 21:37:52,853 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:37:52,854 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-13 21:37:52,854 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602671261] [2019-10-13 21:37:52,856 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:37:52,856 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:37:52,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:37:52,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:37:52,857 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand 6 states. [2019-10-13 21:37:52,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:37:52,971 INFO L93 Difference]: Finished difference Result 50 states and 72 transitions. [2019-10-13 21:37:52,971 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:37:52,972 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-10-13 21:37:52,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:37:52,975 INFO L225 Difference]: With dead ends: 50 [2019-10-13 21:37:52,975 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 21:37:52,977 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:37:52,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 21:37:52,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2019-10-13 21:37:52,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 21:37:52,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2019-10-13 21:37:52,993 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 17 [2019-10-13 21:37:52,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:37:52,994 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2019-10-13 21:37:52,994 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:37:52,994 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2019-10-13 21:37:52,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 21:37:52,995 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:37:52,996 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:37:53,199 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:37:53,200 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:37:53,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:37:53,202 INFO L82 PathProgramCache]: Analyzing trace with hash 421607751, now seen corresponding path program 1 times [2019-10-13 21:37:53,202 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:37:53,203 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060594515] [2019-10-13 21:37:53,203 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:53,203 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:53,203 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:37:53,213 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:37:53,213 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1299698515] [2019-10-13 21:37:53,214 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 21:37:53,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:37:53,276 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 21:37:53,280 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:37:53,321 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:37:53,321 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:37:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-10-13 21:37:53,361 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060594515] [2019-10-13 21:37:53,361 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:37:53,361 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299698515] [2019-10-13 21:37:53,361 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-13 21:37:53,362 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-13 21:37:53,362 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565290465] [2019-10-13 21:37:53,362 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 21:37:53,363 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:37:53,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 21:37:53,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-13 21:37:53,363 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 6 states. [2019-10-13 21:37:53,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:37:53,451 INFO L93 Difference]: Finished difference Result 77 states and 112 transitions. [2019-10-13 21:37:53,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-13 21:37:53,452 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-10-13 21:37:53,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:37:53,453 INFO L225 Difference]: With dead ends: 77 [2019-10-13 21:37:53,454 INFO L226 Difference]: Without dead ends: 51 [2019-10-13 21:37:53,454 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2019-10-13 21:37:53,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-13 21:37:53,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2019-10-13 21:37:53,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-13 21:37:53,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2019-10-13 21:37:53,468 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 25 [2019-10-13 21:37:53,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:37:53,468 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2019-10-13 21:37:53,468 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 21:37:53,468 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2019-10-13 21:37:53,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-13 21:37:53,469 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:37:53,470 INFO L380 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:37:53,674 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:37:53,674 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:37:53,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:37:53,675 INFO L82 PathProgramCache]: Analyzing trace with hash 2016507335, now seen corresponding path program 1 times [2019-10-13 21:37:53,676 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:37:53,676 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419536724] [2019-10-13 21:37:53,677 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:53,677 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:53,677 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:37:53,686 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:37:53,687 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2075307066] [2019-10-13 21:37:53,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:37:53,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:37:53,750 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-13 21:37:53,755 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:37:53,800 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-13 21:37:53,801 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:37:53,861 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2019-10-13 21:37:53,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419536724] [2019-10-13 21:37:53,863 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:37:53,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075307066] [2019-10-13 21:37:53,863 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [621571009] [2019-10-13 21:37:53,906 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-13 21:37:53,907 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:37:53,913 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:37:53,920 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:37:53,921 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:37:54,085 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:37:56,364 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2019-10-13 21:37:56,381 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:37:56,384 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:37:56,384 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:37:56,385 INFO L193 IcfgInterpreter]: Reachable states at location L45-2 satisfy 458#(and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (<= main_~i~0 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (< main_~i~0 main_~n~0) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (= |#NULL.offset| 0) (<= main_~j~0 0) (<= 0 (+ main_~C~0 2147483648)) (= main_~i~0 0) (<= main_~n~0 1000)) [2019-10-13 21:37:56,385 INFO L193 IcfgInterpreter]: Reachable states at location L25-2 satisfy 448#(and (or (<= 1000 main_~k~0) (and (<= 0 main_~j~0) (<= main_~k~0 0) (<= main_~j~0 0))) (or (and (= |#NULL.base| 0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1 main_~j~0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (not (< main_~k~0 main_~n~0)) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~i~0 1000) (<= main_~C~0 2147483647) (= |#NULL.offset| 0) (<= 0 (+ main_~C~0 2147483648)) (<= main_~n~0 1000)) (and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~i~0 1000) (< main_~i~0 main_~n~0) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (= |#NULL.offset| 0) (<= main_~j~0 0) (<= 0 (+ main_~C~0 2147483648)) (<= main_~n~0 1000)))) [2019-10-13 21:37:56,385 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 492#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:37:56,385 INFO L193 IcfgInterpreter]: Reachable states at location L47-2 satisfy 463#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (= main_~n~0 1000) (< main_~i~0 main_~n~0) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= |#NULL.base| 0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= main_~i~0 0) (= |main_~#A~0.offset| 0) (<= |#NULL.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ main_~C~0 2147483648)) (= main_~i~0 0) (<= main_~n~0 1000)) [2019-10-13 21:37:56,386 INFO L193 IcfgInterpreter]: Reachable states at location L27-2 satisfy 443#(and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~i~0 1000) (<= main_~C~0 2147483647) (= |#NULL.offset| 0) (<= 0 (+ main_~C~0 2147483648)) (<= main_~n~0 1000)) [2019-10-13 21:37:56,386 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 478#(and (exists ((v_prenex_2 Int) (|v_main_~#A~0.base_BEFORE_CALL_1| Int) (v_prenex_1 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= 0 (+ (select (select |#memory_int| v_prenex_2) 0) 2147483647)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= (select (select |#memory_int| v_prenex_1) 0) 2147483646) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) 0) 2147483647) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) 0) 2147483648))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:37:56,386 INFO L193 IcfgInterpreter]: Reachable states at location L48 satisfy 468#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (= main_~n~0 1000) (< main_~k~0 main_~n~0) (< main_~i~0 main_~n~0) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= |#NULL.base| 0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (<= |#NULL.base| 0) (= (select (select |#memory_int| |main_~#A~0.base|) (+ (* main_~k~0 4) (* main_~i~0 (* (* main_~n~0 4) main_~n~0)) (* main_~j~0 (* main_~n~0 4)) |main_~#A~0.offset|)) |main_#t~mem1|) (<= 1000 main_~n~0) (<= main_~i~0 0) (= |main_~#A~0.offset| 0) (<= |#NULL.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ main_~C~0 2147483648)) (= main_~i~0 0) (<= main_~n~0 1000)) [2019-10-13 21:37:56,386 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:37:56,387 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:37:56,387 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 497#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:37:56,387 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:37:56,387 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 488#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((v_prenex_2 Int) (|v_main_~#A~0.base_BEFORE_CALL_1| Int) (v_prenex_1 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= 0 (+ (select (select |#memory_int| v_prenex_2) 0) 2147483647)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= (select (select |#memory_int| v_prenex_1) 0) 2147483646) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) 0) 2147483647) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) 0) 2147483648))))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:37:56,388 INFO L193 IcfgInterpreter]: Reachable states at location L42-2 satisfy 453#(and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (<= main_~i~0 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (= |#NULL.offset| 0) (<= main_~j~0 0) (<= 0 (+ main_~C~0 2147483648)) (= main_~i~0 0) (<= main_~n~0 1000)) [2019-10-13 21:37:56,388 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 483#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((v_prenex_2 Int) (|v_main_~#A~0.base_BEFORE_CALL_1| Int) (v_prenex_1 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= 0 (+ (select (select |#memory_int| v_prenex_2) 0) 2147483647)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= (select (select |#memory_int| v_prenex_1) 0) 2147483646) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) 0) 2147483647) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) 0) 2147483648))))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:37:56,388 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 473#(exists ((v_prenex_2 Int) (|v_main_~#A~0.base_BEFORE_CALL_1| Int) (v_prenex_1 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= 0 (+ (select (select |#memory_int| v_prenex_2) 0) 2147483647)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= (select (select |#memory_int| v_prenex_1) 0) 2147483646) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) 0) 2147483647) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_1|) 0) 2147483648))))) [2019-10-13 21:37:56,389 INFO L193 IcfgInterpreter]: Reachable states at location L22-2 satisfy 342#(and (or (and (<= 0 main_~j~0) (<= 0 main_~i~0) (= 0 |#NULL.base|) (= |#length| (store |old(#length)| |main_~#A~0.base| (* (* (* main_~n~0 4) main_~n~0) main_~n~0))) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= 0 |main_~#A~0.offset|) (<= 0 |#NULL.offset|) (not (= 0 |main_~#A~0.base|)) (= main_~n~0 1000) (= |#valid| (store |old(#valid)| |main_~#A~0.base| 1)) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= (select |old(#valid)| |main_~#A~0.base|) 0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= main_~i~0 0) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (< |main_~#A~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= main_~i~0 0)) (and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~C~0 2147483647) (= |#NULL.offset| 0))) (<= 0 (+ main_~C~0 2147483648)) (<= main_~n~0 1000)) [2019-10-13 21:37:56,870 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2019-10-13 21:37:57,243 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:37:57,244 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 12] total 22 [2019-10-13 21:37:57,244 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743873440] [2019-10-13 21:37:57,246 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 21:37:57,246 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:37:57,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 21:37:57,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2019-10-13 21:37:57,247 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand 22 states. [2019-10-13 21:37:58,044 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2019-10-13 21:37:58,317 WARN L191 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2019-10-13 21:37:58,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:37:58,959 INFO L93 Difference]: Finished difference Result 141 states and 198 transitions. [2019-10-13 21:37:58,960 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 21:37:58,960 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 33 [2019-10-13 21:37:58,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:37:58,964 INFO L225 Difference]: With dead ends: 141 [2019-10-13 21:37:58,964 INFO L226 Difference]: Without dead ends: 101 [2019-10-13 21:37:58,966 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=326, Invalid=1080, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 21:37:58,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2019-10-13 21:37:59,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 98. [2019-10-13 21:37:59,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-10-13 21:37:59,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 120 transitions. [2019-10-13 21:37:59,011 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 120 transitions. Word has length 33 [2019-10-13 21:37:59,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:37:59,011 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 120 transitions. [2019-10-13 21:37:59,012 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 21:37:59,012 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 120 transitions. [2019-10-13 21:37:59,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-13 21:37:59,016 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:37:59,016 INFO L380 BasicCegarLoop]: trace histogram [24, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:37:59,220 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:37:59,221 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:37:59,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:37:59,221 INFO L82 PathProgramCache]: Analyzing trace with hash -130175289, now seen corresponding path program 2 times [2019-10-13 21:37:59,222 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:37:59,222 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320096585] [2019-10-13 21:37:59,223 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:59,223 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:37:59,224 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:37:59,235 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:37:59,235 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1271657372] [2019-10-13 21:37:59,236 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:37:59,395 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-10-13 21:37:59,395 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:37:59,397 INFO L256 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 9 conjunts are in the unsatisfiable core [2019-10-13 21:37:59,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:37:59,478 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 154 proven. 21 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-10-13 21:37:59,478 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:37:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 7 proven. 168 refuted. 0 times theorem prover too weak. 221 trivial. 0 not checked. [2019-10-13 21:37:59,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320096585] [2019-10-13 21:37:59,570 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:37:59,570 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271657372] [2019-10-13 21:37:59,571 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1774238336] [2019-10-13 21:37:59,572 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-13 21:37:59,572 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:37:59,573 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:37:59,573 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:37:59,574 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:37:59,631 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:38:01,068 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2019-10-13 21:38:01,075 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:38:01,078 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:38:01,078 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:38:01,078 INFO L193 IcfgInterpreter]: Reachable states at location L45-2 satisfy 458#(and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (<= main_~i~0 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (< main_~i~0 main_~n~0) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (= |#NULL.offset| 0) (<= main_~j~0 0) (<= 0 (+ main_~C~0 2147483648)) (= main_~i~0 0) (<= main_~n~0 1000)) [2019-10-13 21:38:01,078 INFO L193 IcfgInterpreter]: Reachable states at location L25-2 satisfy 448#(and (or (<= 1000 main_~k~0) (and (<= 0 main_~j~0) (<= main_~k~0 0) (<= main_~j~0 0))) (or (and (= |#NULL.base| 0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1 main_~j~0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (not (< main_~k~0 main_~n~0)) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~i~0 1000) (<= main_~C~0 2147483647) (= |#NULL.offset| 0) (<= 0 (+ main_~C~0 2147483648)) (<= main_~n~0 1000)) (and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~i~0 1000) (< main_~i~0 main_~n~0) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (= |#NULL.offset| 0) (<= main_~j~0 0) (<= 0 (+ main_~C~0 2147483648)) (<= main_~n~0 1000)))) [2019-10-13 21:38:01,079 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 492#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:38:01,079 INFO L193 IcfgInterpreter]: Reachable states at location L47-2 satisfy 463#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (= main_~n~0 1000) (< main_~i~0 main_~n~0) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= |#NULL.base| 0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= main_~i~0 0) (= |main_~#A~0.offset| 0) (<= |#NULL.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ main_~C~0 2147483648)) (= main_~i~0 0) (<= main_~n~0 1000)) [2019-10-13 21:38:01,079 INFO L193 IcfgInterpreter]: Reachable states at location L27-2 satisfy 443#(and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~i~0 1000) (<= main_~C~0 2147483647) (= |#NULL.offset| 0) (<= 0 (+ main_~C~0 2147483648)) (<= main_~n~0 1000)) [2019-10-13 21:38:01,079 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 478#(and (exists ((v_prenex_4 Int) (v_prenex_3 Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= 0 (+ (select (select |#memory_int| v_prenex_3) 0) 2147483647)) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= (select (select |#memory_int| v_prenex_4) 0) 2147483646) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) 0) 2147483647) (<= 0 (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) 0) 2147483648)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:01,080 INFO L193 IcfgInterpreter]: Reachable states at location L48 satisfy 468#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (= main_~n~0 1000) (< main_~k~0 main_~n~0) (< main_~i~0 main_~n~0) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= |#NULL.base| 0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (<= |#NULL.base| 0) (= (select (select |#memory_int| |main_~#A~0.base|) (+ (* main_~k~0 4) (* main_~i~0 (* (* main_~n~0 4) main_~n~0)) (* main_~j~0 (* main_~n~0 4)) |main_~#A~0.offset|)) |main_#t~mem1|) (<= 1000 main_~n~0) (<= main_~i~0 0) (= |main_~#A~0.offset| 0) (<= |#NULL.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ main_~C~0 2147483648)) (= main_~i~0 0) (<= main_~n~0 1000)) [2019-10-13 21:38:01,080 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:38:01,080 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:38:01,080 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 497#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:38:01,080 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:38:01,081 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 488#(and (exists ((v_prenex_4 Int) (v_prenex_3 Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= 0 (+ (select (select |#memory_int| v_prenex_3) 0) 2147483647)) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= (select (select |#memory_int| v_prenex_4) 0) 2147483646) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) 0) 2147483647) (<= 0 (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) 0) 2147483648)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:01,081 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 483#(and (exists ((v_prenex_4 Int) (v_prenex_3 Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= 0 (+ (select (select |#memory_int| v_prenex_3) 0) 2147483647)) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= (select (select |#memory_int| v_prenex_4) 0) 2147483646) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) 0) 2147483647) (<= 0 (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) 0) 2147483648)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:01,081 INFO L193 IcfgInterpreter]: Reachable states at location L42-2 satisfy 453#(and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (<= main_~i~0 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (= |#NULL.offset| 0) (<= main_~j~0 0) (<= 0 (+ main_~C~0 2147483648)) (= main_~i~0 0) (<= main_~n~0 1000)) [2019-10-13 21:38:01,081 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 473#(exists ((v_prenex_4 Int) (v_prenex_3 Int) (|v_main_~#A~0.base_BEFORE_CALL_2| Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= 0 (+ (select (select |#memory_int| v_prenex_3) 0) 2147483647)) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= (select (select |#memory_int| v_prenex_4) 0) 2147483646) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) 0) 2147483647) (<= 0 (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_2|) 0) 2147483648)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) [2019-10-13 21:38:01,082 INFO L193 IcfgInterpreter]: Reachable states at location L22-2 satisfy 342#(and (or (and (<= 0 main_~j~0) (<= 0 main_~i~0) (= 0 |#NULL.base|) (= |#length| (store |old(#length)| |main_~#A~0.base| (* (* (* main_~n~0 4) main_~n~0) main_~n~0))) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= 0 |main_~#A~0.offset|) (<= 0 |#NULL.offset|) (not (= 0 |main_~#A~0.base|)) (= main_~n~0 1000) (= |#valid| (store |old(#valid)| |main_~#A~0.base| 1)) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= (select |old(#valid)| |main_~#A~0.base|) 0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= main_~i~0 0) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (< |main_~#A~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= main_~i~0 0)) (and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~C~0 2147483647) (= |#NULL.offset| 0))) (<= 0 (+ main_~C~0 2147483648)) (<= main_~n~0 1000)) [2019-10-13 21:38:01,545 WARN L191 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2019-10-13 21:38:01,956 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:38:01,956 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 12] total 30 [2019-10-13 21:38:01,957 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953290609] [2019-10-13 21:38:01,958 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 21:38:01,958 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:38:01,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 21:38:01,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2019-10-13 21:38:01,959 INFO L87 Difference]: Start difference. First operand 98 states and 120 transitions. Second operand 30 states. [2019-10-13 21:38:03,448 WARN L191 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2019-10-13 21:38:04,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:38:04,654 INFO L93 Difference]: Finished difference Result 265 states and 371 transitions. [2019-10-13 21:38:04,655 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 21:38:04,655 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 49 [2019-10-13 21:38:04,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:38:04,658 INFO L225 Difference]: With dead ends: 265 [2019-10-13 21:38:04,658 INFO L226 Difference]: Without dead ends: 181 [2019-10-13 21:38:04,662 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=722, Invalid=2140, Unknown=0, NotChecked=0, Total=2862 [2019-10-13 21:38:04,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-10-13 21:38:04,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 178. [2019-10-13 21:38:04,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-10-13 21:38:04,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 216 transitions. [2019-10-13 21:38:04,710 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 216 transitions. Word has length 49 [2019-10-13 21:38:04,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:38:04,710 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 216 transitions. [2019-10-13 21:38:04,710 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 21:38:04,711 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 216 transitions. [2019-10-13 21:38:04,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-13 21:38:04,712 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:04,712 INFO L380 BasicCegarLoop]: trace histogram [56, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:04,916 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:04,917 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:04,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:04,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1937432377, now seen corresponding path program 3 times [2019-10-13 21:38:04,918 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:04,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279550947] [2019-10-13 21:38:04,919 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:04,919 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:04,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:04,933 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:38:04,934 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503730221] [2019-10-13 21:38:04,934 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:05,048 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 21:38:05,048 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 21:38:05,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 21:38:05,055 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:38:05,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1788 backedges. 1002 proven. 242 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-10-13 21:38:05,293 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:38:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1788 backedges. 1002 proven. 242 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2019-10-13 21:38:05,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279550947] [2019-10-13 21:38:05,554 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:38:05,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503730221] [2019-10-13 21:38:05,554 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [7727353] [2019-10-13 21:38:05,556 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-13 21:38:05,556 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:38:05,556 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:38:05,557 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:38:05,557 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:38:05,582 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:38:06,807 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2019-10-13 21:38:06,815 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:38:06,817 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:38:06,817 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:38:06,818 INFO L193 IcfgInterpreter]: Reachable states at location L45-2 satisfy 458#(and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (<= main_~i~0 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (< main_~i~0 main_~n~0) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (= |#NULL.offset| 0) (<= main_~j~0 0) (<= 0 (+ main_~C~0 2147483648)) (= main_~i~0 0) (<= main_~n~0 1000)) [2019-10-13 21:38:06,818 INFO L193 IcfgInterpreter]: Reachable states at location L25-2 satisfy 448#(and (or (<= 1000 main_~k~0) (and (<= 0 main_~j~0) (<= main_~k~0 0) (<= main_~j~0 0))) (or (and (= |#NULL.base| 0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1 main_~j~0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (not (< main_~k~0 main_~n~0)) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~i~0 1000) (<= main_~C~0 2147483647) (= |#NULL.offset| 0) (<= 0 (+ main_~C~0 2147483648)) (<= main_~n~0 1000)) (and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~i~0 1000) (< main_~i~0 main_~n~0) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (= |#NULL.offset| 0) (<= main_~j~0 0) (<= 0 (+ main_~C~0 2147483648)) (<= main_~n~0 1000)))) [2019-10-13 21:38:06,818 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 492#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:38:06,818 INFO L193 IcfgInterpreter]: Reachable states at location L47-2 satisfy 463#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (= main_~n~0 1000) (< main_~i~0 main_~n~0) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= |#NULL.base| 0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= main_~i~0 0) (= |main_~#A~0.offset| 0) (<= |#NULL.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ main_~C~0 2147483648)) (= main_~i~0 0) (<= main_~n~0 1000)) [2019-10-13 21:38:06,818 INFO L193 IcfgInterpreter]: Reachable states at location L27-2 satisfy 443#(and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~i~0 1000) (<= main_~C~0 2147483647) (= |#NULL.offset| 0) (<= 0 (+ main_~C~0 2147483648)) (<= main_~n~0 1000)) [2019-10-13 21:38:06,818 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 478#(and (exists ((v_prenex_6 Int) (v_prenex_5 Int) (|v_main_~#A~0.base_BEFORE_CALL_3| Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= 0 (+ (select (select |#memory_int| v_prenex_6) 0) 2147483648)) (<= (select (select |#memory_int| v_prenex_6) 0) 2147483647) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= (select (select |#memory_int| v_prenex_5) 0) 2147483646) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) 0) 2147483647))))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:06,819 INFO L193 IcfgInterpreter]: Reachable states at location L48 satisfy 468#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (= main_~n~0 1000) (< main_~k~0 main_~n~0) (< main_~i~0 main_~n~0) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= |#NULL.base| 0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (<= |#NULL.base| 0) (= (select (select |#memory_int| |main_~#A~0.base|) (+ (* main_~k~0 4) (* main_~i~0 (* (* main_~n~0 4) main_~n~0)) (* main_~j~0 (* main_~n~0 4)) |main_~#A~0.offset|)) |main_#t~mem1|) (<= 1000 main_~n~0) (<= main_~i~0 0) (= |main_~#A~0.offset| 0) (<= |#NULL.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ main_~C~0 2147483648)) (= main_~i~0 0) (<= main_~n~0 1000)) [2019-10-13 21:38:06,819 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:38:06,819 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:38:06,819 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 497#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:38:06,819 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:38:06,820 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 488#(and (<= __VERIFIER_assert_~cond 0) (exists ((v_prenex_6 Int) (v_prenex_5 Int) (|v_main_~#A~0.base_BEFORE_CALL_3| Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= 0 (+ (select (select |#memory_int| v_prenex_6) 0) 2147483648)) (<= (select (select |#memory_int| v_prenex_6) 0) 2147483647) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= (select (select |#memory_int| v_prenex_5) 0) 2147483646) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) 0) 2147483647))))) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:06,820 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 483#(and (<= __VERIFIER_assert_~cond 0) (exists ((v_prenex_6 Int) (v_prenex_5 Int) (|v_main_~#A~0.base_BEFORE_CALL_3| Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= 0 (+ (select (select |#memory_int| v_prenex_6) 0) 2147483648)) (<= (select (select |#memory_int| v_prenex_6) 0) 2147483647) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= (select (select |#memory_int| v_prenex_5) 0) 2147483646) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) 0) 2147483647))))) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:06,820 INFO L193 IcfgInterpreter]: Reachable states at location L42-2 satisfy 453#(and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (<= main_~i~0 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (= |#NULL.offset| 0) (<= main_~j~0 0) (<= 0 (+ main_~C~0 2147483648)) (= main_~i~0 0) (<= main_~n~0 1000)) [2019-10-13 21:38:06,820 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 473#(exists ((v_prenex_6 Int) (v_prenex_5 Int) (|v_main_~#A~0.base_BEFORE_CALL_3| Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= 0 (+ (select (select |#memory_int| v_prenex_6) 0) 2147483648)) (<= (select (select |#memory_int| v_prenex_6) 0) 2147483647) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= (select (select |#memory_int| v_prenex_5) 0) 2147483646) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (<= 0 (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_3|) 0) 2147483647))))) [2019-10-13 21:38:06,821 INFO L193 IcfgInterpreter]: Reachable states at location L22-2 satisfy 342#(and (or (and (<= 0 main_~j~0) (<= 0 main_~i~0) (= 0 |#NULL.base|) (= |#length| (store |old(#length)| |main_~#A~0.base| (* (* (* main_~n~0 4) main_~n~0) main_~n~0))) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= 0 |main_~#A~0.offset|) (<= 0 |#NULL.offset|) (not (= 0 |main_~#A~0.base|)) (= main_~n~0 1000) (= |#valid| (store |old(#valid)| |main_~#A~0.base| 1)) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= (select |old(#valid)| |main_~#A~0.base|) 0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= main_~i~0 0) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (< |main_~#A~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= main_~i~0 0)) (and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~C~0 2147483647) (= |#NULL.offset| 0))) (<= 0 (+ main_~C~0 2147483648)) (<= main_~n~0 1000)) [2019-10-13 21:38:07,437 WARN L191 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2019-10-13 21:38:07,962 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:38:07,963 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 12] total 50 [2019-10-13 21:38:07,963 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629181945] [2019-10-13 21:38:07,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-10-13 21:38:07,965 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:38:07,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-10-13 21:38:07,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=578, Invalid=1872, Unknown=0, NotChecked=0, Total=2450 [2019-10-13 21:38:07,967 INFO L87 Difference]: Start difference. First operand 178 states and 216 transitions. Second operand 50 states. [2019-10-13 21:38:09,350 WARN L191 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2019-10-13 21:38:09,806 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2019-10-13 21:38:10,342 WARN L191 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 33 [2019-10-13 21:38:11,832 WARN L191 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2019-10-13 21:38:12,059 WARN L191 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2019-10-13 21:38:12,302 WARN L191 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2019-10-13 21:38:12,628 WARN L191 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 38 [2019-10-13 21:38:14,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:38:14,781 INFO L93 Difference]: Finished difference Result 700 states and 872 transitions. [2019-10-13 21:38:14,781 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-10-13 21:38:14,781 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 81 [2019-10-13 21:38:14,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:38:14,786 INFO L225 Difference]: With dead ends: 700 [2019-10-13 21:38:14,786 INFO L226 Difference]: Without dead ends: 561 [2019-10-13 21:38:14,792 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 194 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3840 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=2688, Invalid=8024, Unknown=0, NotChecked=0, Total=10712 [2019-10-13 21:38:14,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2019-10-13 21:38:14,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 558. [2019-10-13 21:38:14,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 558 states. [2019-10-13 21:38:14,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 681 transitions. [2019-10-13 21:38:14,899 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 681 transitions. Word has length 81 [2019-10-13 21:38:14,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:38:14,902 INFO L462 AbstractCegarLoop]: Abstraction has 558 states and 681 transitions. [2019-10-13 21:38:14,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-10-13 21:38:14,902 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 681 transitions. [2019-10-13 21:38:14,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2019-10-13 21:38:14,914 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:14,915 INFO L380 BasicCegarLoop]: trace histogram [196, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:15,115 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:15,116 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:15,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:15,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1331474927, now seen corresponding path program 4 times [2019-10-13 21:38:15,117 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:15,117 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912014250] [2019-10-13 21:38:15,118 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:15,118 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:15,118 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:15,137 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:38:15,138 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709295793] [2019-10-13 21:38:15,138 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:15,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 21:38:15,376 INFO L256 TraceCheckSpWp]: Trace formula consists of 957 conjuncts, 17 conjunts are in the unsatisfiable core [2019-10-13 21:38:15,387 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 21:38:15,618 INFO L134 CoverageAnalysis]: Checked inductivity of 22068 backedges. 2942 proven. 105 refuted. 0 times theorem prover too weak. 19021 trivial. 0 not checked. [2019-10-13 21:38:15,619 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-13 21:38:16,041 INFO L134 CoverageAnalysis]: Checked inductivity of 22068 backedges. 2942 proven. 105 refuted. 0 times theorem prover too weak. 19021 trivial. 0 not checked. [2019-10-13 21:38:16,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912014250] [2019-10-13 21:38:16,041 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 21:38:16,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709295793] [2019-10-13 21:38:16,042 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [919646085] [2019-10-13 21:38:16,047 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-13 21:38:16,048 INFO L169 IcfgInterpreter]: Building call graph [2019-10-13 21:38:16,048 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-13 21:38:16,049 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-13 21:38:16,049 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-13 21:38:16,080 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-13 21:38:17,325 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 37 for LOIs [2019-10-13 21:38:17,330 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-13 21:38:17,332 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-13 21:38:17,333 INFO L191 IcfgInterpreter]: Final predicates for locations of interest are: [2019-10-13 21:38:17,333 INFO L193 IcfgInterpreter]: Reachable states at location L45-2 satisfy 458#(and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (<= main_~i~0 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (< main_~i~0 main_~n~0) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (= |#NULL.offset| 0) (<= main_~j~0 0) (<= 0 (+ main_~C~0 2147483648)) (= main_~i~0 0) (<= main_~n~0 1000)) [2019-10-13 21:38:17,333 INFO L193 IcfgInterpreter]: Reachable states at location L25-2 satisfy 448#(and (or (<= 1000 main_~k~0) (and (<= 0 main_~j~0) (<= main_~k~0 0) (<= main_~j~0 0))) (or (and (= |#NULL.base| 0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1 main_~j~0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (not (< main_~k~0 main_~n~0)) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~i~0 1000) (<= main_~C~0 2147483647) (= |#NULL.offset| 0) (<= 0 (+ main_~C~0 2147483648)) (<= main_~n~0 1000)) (and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~i~0 1000) (< main_~i~0 main_~n~0) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (= |#NULL.offset| 0) (<= main_~j~0 0) (<= 0 (+ main_~C~0 2147483648)) (<= main_~n~0 1000)))) [2019-10-13 21:38:17,333 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initENTRY satisfy 492#(and (= |old(#NULL.base)| |#NULL.base|) (= |#valid| |old(#valid)|) (= |#NULL.offset| |old(#NULL.offset)|)) [2019-10-13 21:38:17,334 INFO L193 IcfgInterpreter]: Reachable states at location L47-2 satisfy 463#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (= main_~n~0 1000) (< main_~i~0 main_~n~0) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= |#NULL.base| 0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= main_~i~0 0) (= |main_~#A~0.offset| 0) (<= |#NULL.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ main_~C~0 2147483648)) (= main_~i~0 0) (<= main_~n~0 1000)) [2019-10-13 21:38:17,334 INFO L193 IcfgInterpreter]: Reachable states at location L4 satisfy 478#(and (exists ((v_prenex_7 Int) (|v_main_~#A~0.base_BEFORE_CALL_4| Int) (v_prenex_8 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= (select (select |#memory_int| v_prenex_7) 0) 2147483646) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) 0) 2147483647) (<= 0 (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) 0) 2147483648)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= 0 (+ (select (select |#memory_int| v_prenex_8) 0) 2147483647)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:17,334 INFO L193 IcfgInterpreter]: Reachable states at location L27-2 satisfy 443#(and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~i~0 1000) (<= main_~C~0 2147483647) (= |#NULL.offset| 0) (<= 0 (+ main_~C~0 2147483648)) (<= main_~n~0 1000)) [2019-10-13 21:38:17,334 INFO L193 IcfgInterpreter]: Reachable states at location L48 satisfy 468#(and (<= 0 main_~j~0) (<= 0 main_~i~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (= main_~n~0 1000) (< main_~k~0 main_~n~0) (< main_~i~0 main_~n~0) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= |#NULL.base| 0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~k~0) (< main_~j~0 main_~n~0) (<= |#NULL.base| 0) (= (select (select |#memory_int| |main_~#A~0.base|) (+ (* main_~k~0 4) (* main_~i~0 (* (* main_~n~0 4) main_~n~0)) (* main_~j~0 (* main_~n~0 4)) |main_~#A~0.offset|)) |main_#t~mem1|) (<= 1000 main_~n~0) (<= main_~i~0 0) (= |main_~#A~0.offset| 0) (<= |#NULL.offset| 0) (= |#NULL.offset| 0) (<= 0 (+ main_~C~0 2147483648)) (= main_~i~0 0) (<= main_~n~0 1000)) [2019-10-13 21:38:17,334 INFO L193 IcfgInterpreter]: Reachable states at location L-1 satisfy 23#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= 0 (select |#valid| 0)) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:38:17,335 INFO L193 IcfgInterpreter]: Reachable states at location mainENTRY satisfy 33#(and (= 0 |#NULL.base|) (<= |#NULL.base| 0) (= |#valid| |old(#valid)|) (<= 0 |#NULL.base|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= |old(#length)| |#length|) (= 0 (select |old(#valid)| 0)) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:38:17,335 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.initEXIT satisfy 497#(and (= |#valid| (store |old(#valid)| 0 0)) (= 0 |#NULL.base|) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) [2019-10-13 21:38:17,335 INFO L193 IcfgInterpreter]: Reachable states at location ULTIMATE.startENTRY satisfy 6#true [2019-10-13 21:38:17,335 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION satisfy 488#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((v_prenex_7 Int) (|v_main_~#A~0.base_BEFORE_CALL_4| Int) (v_prenex_8 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= (select (select |#memory_int| v_prenex_7) 0) 2147483646) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) 0) 2147483647) (<= 0 (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) 0) 2147483648)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= 0 (+ (select (select |#memory_int| v_prenex_8) 0) 2147483647)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:17,335 INFO L193 IcfgInterpreter]: Reachable states at location L5 satisfy 483#(and (<= __VERIFIER_assert_~cond 0) (<= 0 |__VERIFIER_assert_#in~cond|) (<= |__VERIFIER_assert_#in~cond| 0) (exists ((v_prenex_7 Int) (|v_main_~#A~0.base_BEFORE_CALL_4| Int) (v_prenex_8 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= (select (select |#memory_int| v_prenex_7) 0) 2147483646) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) 0) 2147483647) (<= 0 (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) 0) 2147483648)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= 0 (+ (select (select |#memory_int| v_prenex_8) 0) 2147483647)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) (<= 0 __VERIFIER_assert_~cond) (= 0 __VERIFIER_assert_~cond) (= |__VERIFIER_assert_#in~cond| __VERIFIER_assert_~cond)) [2019-10-13 21:38:17,336 INFO L193 IcfgInterpreter]: Reachable states at location L42-2 satisfy 453#(and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (<= main_~i~0 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (= |#NULL.offset| 0) (<= main_~j~0 0) (<= 0 (+ main_~C~0 2147483648)) (= main_~i~0 0) (<= main_~n~0 1000)) [2019-10-13 21:38:17,336 INFO L193 IcfgInterpreter]: Reachable states at location __VERIFIER_assertENTRY satisfy 473#(exists ((v_prenex_7 Int) (|v_main_~#A~0.base_BEFORE_CALL_4| Int) (v_prenex_8 Int)) (or (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= (select (select |#memory_int| v_prenex_7) 0) 2147483646) (<= 0 |#NULL.base|) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 1) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) 0) 2147483647) (<= 0 (+ (select (select |#memory_int| |v_main_~#A~0.base_BEFORE_CALL_4|) 0) 2147483648)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)) (and (= |#NULL.base| 0) (= |__VERIFIER_assert_#in~cond| 0) (<= |#NULL.base| 0) (<= 0 |#NULL.base|) (<= 0 (+ (select (select |#memory_int| v_prenex_8) 0) 2147483647)) (= |#NULL.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0)))) [2019-10-13 21:38:17,336 INFO L193 IcfgInterpreter]: Reachable states at location L22-2 satisfy 342#(and (or (and (<= 0 main_~j~0) (<= 0 main_~i~0) (= 0 |#NULL.base|) (= |#length| (store |old(#length)| |main_~#A~0.base| (* (* (* main_~n~0 4) main_~n~0) main_~n~0))) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= 0 |main_~#A~0.offset|) (<= 0 |#NULL.offset|) (not (= 0 |main_~#A~0.base|)) (= main_~n~0 1000) (= |#valid| (store |old(#valid)| |main_~#A~0.base| 1)) (<= main_~C~0 2147483647) (= main_~k~0 0) (= main_~j~0 0) (<= main_~k~0 0) (<= main_~j~0 0) (= (select |old(#valid)| |main_~#A~0.base|) 0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= main_~i~0 0) (= 0 (select |old(#valid)| 0)) (<= |#NULL.offset| 0) (< |main_~#A~0.base| |#StackHeapBarrier|) (= |#memory_int| |old(#memory_int)|) (= |#NULL.offset| 0) (= main_~i~0 0)) (and (= |#NULL.base| 0) (<= 0 main_~j~0) (<= 0 |main_~#A~0.offset|) (<= 0 main_~i~0) (<= 0 main_~k~0) (<= |#NULL.base| 0) (<= 1000 main_~n~0) (<= 0 |#NULL.base|) (<= |main_~#A~0.offset| 0) (= |main_~#A~0.offset| 0) (<= 0 |#NULL.offset|) (<= |#NULL.offset| 0) (= main_~n~0 1000) (<= main_~C~0 2147483647) (= |#NULL.offset| 0))) (<= 0 (+ main_~C~0 2147483648)) (<= main_~n~0 1000)) [2019-10-13 21:38:17,699 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 25 [2019-10-13 21:38:17,917 WARN L191 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 31 [2019-10-13 21:38:18,265 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-13 21:38:18,266 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 12] total 46 [2019-10-13 21:38:18,266 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270900128] [2019-10-13 21:38:18,267 INFO L442 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-10-13 21:38:18,268 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-13 21:38:18,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-10-13 21:38:18,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=641, Invalid=1429, Unknown=0, NotChecked=0, Total=2070 [2019-10-13 21:38:18,269 INFO L87 Difference]: Start difference. First operand 558 states and 681 transitions. Second operand 46 states. [2019-10-13 21:38:21,333 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2019-10-13 21:38:23,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 21:38:23,051 INFO L93 Difference]: Finished difference Result 1657 states and 2349 transitions. [2019-10-13 21:38:23,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-10-13 21:38:23,052 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 241 [2019-10-13 21:38:23,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 21:38:23,064 INFO L225 Difference]: With dead ends: 1657 [2019-10-13 21:38:23,064 INFO L226 Difference]: Without dead ends: 1121 [2019-10-13 21:38:23,070 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 763 GetRequests, 677 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=2090, Invalid=5220, Unknown=0, NotChecked=0, Total=7310 [2019-10-13 21:38:23,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2019-10-13 21:38:23,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 1118. [2019-10-13 21:38:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1118 states. [2019-10-13 21:38:23,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 1353 transitions. [2019-10-13 21:38:23,217 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 1353 transitions. Word has length 241 [2019-10-13 21:38:23,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 21:38:23,217 INFO L462 AbstractCegarLoop]: Abstraction has 1118 states and 1353 transitions. [2019-10-13 21:38:23,217 INFO L463 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-10-13 21:38:23,218 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 1353 transitions. [2019-10-13 21:38:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 466 [2019-10-13 21:38:23,229 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 21:38:23,230 INFO L380 BasicCegarLoop]: trace histogram [420, 14, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 21:38:23,440 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 21:38:23,441 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 21:38:23,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 21:38:23,441 INFO L82 PathProgramCache]: Analyzing trace with hash -148070417, now seen corresponding path program 5 times [2019-10-13 21:38:23,441 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-13 21:38:23,441 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742221388] [2019-10-13 21:38:23,441 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:23,442 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 21:38:23,442 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 21:38:23,463 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 21:38:23,464 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1212621369] [2019-10-13 21:38:23,464 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true