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/add-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 01:36:30,121 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 01:36:30,124 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 01:36:30,140 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 01:36:30,141 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 01:36:30,142 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 01:36:30,143 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 01:36:30,145 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 01:36:30,147 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 01:36:30,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 01:36:30,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 01:36:30,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 01:36:30,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 01:36:30,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 01:36:30,153 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 01:36:30,154 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 01:36:30,155 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 01:36:30,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 01:36:30,158 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 01:36:30,160 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 01:36:30,162 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 01:36:30,163 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 01:36:30,164 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 01:36:30,165 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 01:36:30,169 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-15 01:36:30,170 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-15 01:36:30,170 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-15 01:36:30,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-15 01:36:30,174 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-15 01:36:30,176 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-15 01:36:30,176 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-15 01:36:30,178 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-15 01:36:30,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-15 01:36:30,181 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-15 01:36:30,182 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-15 01:36:30,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-15 01:36:30,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-15 01:36:30,186 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-15 01:36:30,186 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 01:36:30,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 01:36:30,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 01:36:30,193 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 [2019-10-15 01:36:30,219 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 01:36:30,219 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 01:36:30,221 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 01:36:30,222 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 01:36:30,222 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 01:36:30,222 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 01:36:30,223 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 01:36:30,223 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 01:36:30,224 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 01:36:30,224 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 01:36:30,225 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 01:36:30,225 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 01:36:30,225 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 01:36:30,226 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 01:36:30,226 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 01:36:30,226 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 01:36:30,226 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 01:36:30,227 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 01:36:30,227 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 01:36:30,227 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 01:36:30,228 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 01:36:30,228 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 01:36:30,228 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 01:36:30,229 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 01:36:30,229 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 01:36:30,229 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 01:36:30,229 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 01:36:30,229 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 01:36:30,230 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 [2019-10-15 01:36:30,537 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 01:36:30,550 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 01:36:30,553 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 01:36:30,555 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 01:36:30,555 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 01:36:30,556 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/add-2-n-u.c [2019-10-15 01:36:30,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0bb3bfc1/a6614d9bbe0c42ab98671aa53edcb4b2/FLAG6baad30e8 [2019-10-15 01:36:31,084 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 01:36:31,085 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/add-2-n-u.c [2019-10-15 01:36:31,091 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0bb3bfc1/a6614d9bbe0c42ab98671aa53edcb4b2/FLAG6baad30e8 [2019-10-15 01:36:31,608 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0bb3bfc1/a6614d9bbe0c42ab98671aa53edcb4b2 [2019-10-15 01:36:31,619 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 01:36:31,621 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 01:36:31,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:31,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 01:36:31,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 01:36:31,627 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:31" (1/1) ... [2019-10-15 01:36:31,630 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d0ba41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:31, skipping insertion in model container [2019-10-15 01:36:31,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 01:36:31" (1/1) ... [2019-10-15 01:36:31,638 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 01:36:31,654 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 01:36:31,916 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:31,922 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 01:36:31,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 01:36:32,092 INFO L192 MainTranslator]: Completed translation [2019-10-15 01:36:32,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32 WrapperNode [2019-10-15 01:36:32,094 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 01:36:32,094 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 01:36:32,095 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 01:36:32,095 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 01:36:32,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:32,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:32,120 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:32,121 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:32,129 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:32,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:32,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (1/1) ... [2019-10-15 01:36:32,140 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 01:36:32,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 01:36:32,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 01:36:32,141 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 01:36:32,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (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 [2019-10-15 01:36:32,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 01:36:32,211 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 01:36:32,211 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-15 01:36:32,211 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 01:36:32,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 01:36:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-15 01:36:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2019-10-15 01:36:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 01:36:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-15 01:36:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-15 01:36:32,212 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-15 01:36:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-15 01:36:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 01:36:32,213 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 01:36:32,615 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 01:36:32,616 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-15 01:36:32,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:32 BoogieIcfgContainer [2019-10-15 01:36:32,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 01:36:32,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 01:36:32,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 01:36:32,622 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 01:36:32,623 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 01:36:31" (1/3) ... [2019-10-15 01:36:32,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c7937fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:32, skipping insertion in model container [2019-10-15 01:36:32,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 01:36:32" (2/3) ... [2019-10-15 01:36:32,624 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c7937fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 01:36:32, skipping insertion in model container [2019-10-15 01:36:32,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 01:36:32" (3/3) ... [2019-10-15 01:36:32,626 INFO L109 eAbstractionObserver]: Analyzing ICFG add-2-n-u.c [2019-10-15 01:36:32,636 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 01:36:32,644 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 01:36:32,655 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 01:36:32,681 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 01:36:32,681 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 01:36:32,681 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 01:36:32,682 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 01:36:32,682 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 01:36:32,682 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 01:36:32,682 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 01:36:32,683 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 01:36:32,701 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-10-15 01:36:32,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-15 01:36:32,706 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:32,707 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:32,709 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:32,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:32,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1167341109, now seen corresponding path program 1 times [2019-10-15 01:36:32,721 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:32,722 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574886155] [2019-10-15 01:36:32,722 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:32,722 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:32,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:32,812 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:32,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1333603195] [2019-10-15 01:36:32,812 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 [2019-10-15 01:36:32,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:32,913 INFO L256 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:36:32,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:32,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:32,965 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:32,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 01:36:33,000 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574886155] [2019-10-15 01:36:33,000 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:33,000 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333603195] [2019-10-15 01:36:33,001 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:33,001 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2019-10-15 01:36:33,002 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764899170] [2019-10-15 01:36:33,009 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 01:36:33,009 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:33,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 01:36:33,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 01:36:33,027 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-10-15 01:36:33,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:33,116 INFO L93 Difference]: Finished difference Result 40 states and 54 transitions. [2019-10-15 01:36:33,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 01:36:33,118 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-10-15 01:36:33,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:33,127 INFO L225 Difference]: With dead ends: 40 [2019-10-15 01:36:33,127 INFO L226 Difference]: Without dead ends: 22 [2019-10-15 01:36:33,131 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 [2019-10-15 01:36:33,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-15 01:36:33,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-15 01:36:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-15 01:36:33,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2019-10-15 01:36:33,170 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 13 [2019-10-15 01:36:33,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:33,171 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2019-10-15 01:36:33,171 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 01:36:33,171 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2019-10-15 01:36:33,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-15 01:36:33,172 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:33,172 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:33,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:33,378 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:33,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:33,378 INFO L82 PathProgramCache]: Analyzing trace with hash -155281745, now seen corresponding path program 1 times [2019-10-15 01:36:33,379 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:33,379 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165720127] [2019-10-15 01:36:33,380 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:33,380 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:33,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:33,390 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:33,391 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [639193282] [2019-10-15 01:36:33,391 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 [2019-10-15 01:36:33,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:33,441 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-15 01:36:33,443 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:36:33,466 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:33,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-15 01:36:33,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165720127] [2019-10-15 01:36:33,508 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:33,508 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639193282] [2019-10-15 01:36:33,509 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2019-10-15 01:36:33,509 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2019-10-15 01:36:33,509 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280994466] [2019-10-15 01:36:33,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 01:36:33,511 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:33,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 01:36:33,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 01:36:33,512 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand 6 states. [2019-10-15 01:36:33,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:33,691 INFO L93 Difference]: Finished difference Result 49 states and 70 transitions. [2019-10-15 01:36:33,691 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-15 01:36:33,691 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2019-10-15 01:36:33,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:33,694 INFO L225 Difference]: With dead ends: 49 [2019-10-15 01:36:33,695 INFO L226 Difference]: Without dead ends: 34 [2019-10-15 01:36:33,696 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 [2019-10-15 01:36:33,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-15 01:36:33,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-10-15 01:36:33,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-15 01:36:33,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2019-10-15 01:36:33,721 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 17 [2019-10-15 01:36:33,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:33,722 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2019-10-15 01:36:33,722 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 01:36:33,723 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2019-10-15 01:36:33,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-15 01:36:33,725 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:33,725 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:33,930 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:33,930 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:33,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:33,931 INFO L82 PathProgramCache]: Analyzing trace with hash -2100840913, now seen corresponding path program 1 times [2019-10-15 01:36:33,931 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:33,932 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428394156] [2019-10-15 01:36:33,932 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:33,932 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:33,932 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:33,942 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:33,942 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063957786] [2019-10-15 01:36:33,942 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 [2019-10-15 01:36:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:34,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:36:34,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:36:34,075 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 01:36:34,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428394156] [2019-10-15 01:36:34,142 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:34,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063957786] [2019-10-15 01:36:34,142 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [450275484] [2019-10-15 01:36:34,197 INFO L162 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-10-15 01:36:34,197 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:34,204 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:34,211 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:34,212 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:34,428 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:35,251 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 1 for LOIs [2019-10-15 01:36:35,266 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:35,273 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:35,598 WARN L191 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-10-15 01:36:35,675 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 01:36:35,675 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [6, 6] total 18 [2019-10-15 01:36:35,675 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331153404] [2019-10-15 01:36:35,676 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-15 01:36:35,677 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:35,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-15 01:36:35,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2019-10-15 01:36:35,678 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 10 states. [2019-10-15 01:36:35,918 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 61 [2019-10-15 01:36:36,141 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2019-10-15 01:36:36,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:36,360 INFO L93 Difference]: Finished difference Result 53 states and 64 transitions. [2019-10-15 01:36:36,360 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-15 01:36:36,360 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2019-10-15 01:36:36,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:36,362 INFO L225 Difference]: With dead ends: 53 [2019-10-15 01:36:36,362 INFO L226 Difference]: Without dead ends: 38 [2019-10-15 01:36:36,363 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2019-10-15 01:36:36,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-15 01:36:36,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 33. [2019-10-15 01:36:36,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-15 01:36:36,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2019-10-15 01:36:36,375 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 21 [2019-10-15 01:36:36,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:36,376 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2019-10-15 01:36:36,376 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-15 01:36:36,376 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2019-10-15 01:36:36,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-15 01:36:36,377 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:36,377 INFO L380 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:36,586 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:36,587 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:36,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:36,588 INFO L82 PathProgramCache]: Analyzing trace with hash 2111829734, now seen corresponding path program 1 times [2019-10-15 01:36:36,589 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:36,589 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685519526] [2019-10-15 01:36:36,589 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:36,590 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:36,590 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:36,598 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:36,598 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1459378593] [2019-10-15 01:36:36,599 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 [2019-10-15 01:36:36,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 01:36:36,675 INFO L256 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-15 01:36:36,677 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:36,737 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:36:36,737 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-15 01:36:36,771 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685519526] [2019-10-15 01:36:36,771 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:36,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459378593] [2019-10-15 01:36:36,772 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [662163714] [2019-10-15 01:36:36,774 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:36,774 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:36,775 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:36,775 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:36,776 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:36,819 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:38,108 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2019-10-15 01:36:38,120 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:38,124 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:38,453 WARN L191 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-10-15 01:36:40,973 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:40,974 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 14] total 24 [2019-10-15 01:36:40,974 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134823255] [2019-10-15 01:36:40,975 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-15 01:36:40,976 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:40,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-15 01:36:40,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=464, Unknown=1, NotChecked=0, Total=552 [2019-10-15 01:36:40,978 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand 24 states. [2019-10-15 01:36:41,396 WARN L191 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2019-10-15 01:36:41,948 WARN L191 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2019-10-15 01:36:55,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:36:55,439 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2019-10-15 01:36:55,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-15 01:36:55,440 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 25 [2019-10-15 01:36:55,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:36:55,442 INFO L225 Difference]: With dead ends: 92 [2019-10-15 01:36:55,443 INFO L226 Difference]: Without dead ends: 68 [2019-10-15 01:36:55,445 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=323, Invalid=1236, Unknown=1, NotChecked=0, Total=1560 [2019-10-15 01:36:55,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2019-10-15 01:36:55,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 64. [2019-10-15 01:36:55,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-15 01:36:55,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2019-10-15 01:36:55,460 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 25 [2019-10-15 01:36:55,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:36:55,461 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2019-10-15 01:36:55,461 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-15 01:36:55,461 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2019-10-15 01:36:55,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-15 01:36:55,462 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:36:55,462 INFO L380 BasicCegarLoop]: trace histogram [12, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:36:55,663 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:36:55,663 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:36:55,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:36:55,663 INFO L82 PathProgramCache]: Analyzing trace with hash 2053538854, now seen corresponding path program 2 times [2019-10-15 01:36:55,664 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:36:55,664 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928328984] [2019-10-15 01:36:55,664 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:55,664 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:36:55,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:36:55,674 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:36:55,675 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446219786] [2019-10-15 01:36:55,675 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 [2019-10-15 01:36:55,748 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-15 01:36:55,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-15 01:36:55,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 01:36:55,756 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 01:36:55,777 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-10-15 01:36:55,778 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 01:36:55,803 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2019-10-15 01:36:55,803 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928328984] [2019-10-15 01:36:55,804 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-15 01:36:55,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446219786] [2019-10-15 01:36:55,804 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1446607425] [2019-10-15 01:36:55,806 INFO L162 IcfgInterpreter]: Started Sifa with 16 locations of interest [2019-10-15 01:36:55,807 INFO L169 IcfgInterpreter]: Building call graph [2019-10-15 01:36:55,807 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-15 01:36:55,807 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-15 01:36:55,807 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-15 01:36:55,829 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 21 for LOIs [2019-10-15 01:36:56,751 INFO L199 IcfgInterpreter]: Interpreting procedure __VERIFIER_assert with input of size 44 for LOIs [2019-10-15 01:36:56,757 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 10 for LOIs [2019-10-15 01:36:56,760 INFO L183 IcfgInterpreter]: Interpretation finished [2019-10-15 01:36:57,096 WARN L191 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 65 [2019-10-15 01:36:59,548 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-10-15 01:36:59,549 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 14] total 22 [2019-10-15 01:36:59,549 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060008185] [2019-10-15 01:36:59,550 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-15 01:36:59,550 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-10-15 01:36:59,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-15 01:36:59,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=388, Unknown=1, NotChecked=0, Total=462 [2019-10-15 01:36:59,551 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand 22 states. [2019-10-15 01:36:59,819 WARN L191 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2019-10-15 01:37:00,194 WARN L191 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2019-10-15 01:37:00,471 WARN L191 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2019-10-15 01:37:00,778 WARN L191 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2019-10-15 01:37:01,078 WARN L191 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2019-10-15 01:37:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 01:37:13,000 INFO L93 Difference]: Finished difference Result 206 states and 256 transitions. [2019-10-15 01:37:13,001 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-15 01:37:13,001 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 37 [2019-10-15 01:37:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 01:37:13,003 INFO L225 Difference]: With dead ends: 206 [2019-10-15 01:37:13,003 INFO L226 Difference]: Without dead ends: 164 [2019-10-15 01:37:13,005 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=269, Invalid=1061, Unknown=2, NotChecked=0, Total=1332 [2019-10-15 01:37:13,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-10-15 01:37:13,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 104. [2019-10-15 01:37:13,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2019-10-15 01:37:13,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 121 transitions. [2019-10-15 01:37:13,031 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 121 transitions. Word has length 37 [2019-10-15 01:37:13,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 01:37:13,032 INFO L462 AbstractCegarLoop]: Abstraction has 104 states and 121 transitions. [2019-10-15 01:37:13,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-15 01:37:13,032 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 121 transitions. [2019-10-15 01:37:13,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-10-15 01:37:13,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 01:37:13,034 INFO L380 BasicCegarLoop]: trace histogram [24, 24, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 01:37:13,245 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 01:37:13,246 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 01:37:13,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 01:37:13,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1587394043, now seen corresponding path program 3 times [2019-10-15 01:37:13,246 INFO L157 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-15 01:37:13,246 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999136952] [2019-10-15 01:37:13,246 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:13,246 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 01:37:13,247 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 01:37:13,270 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-15 01:37:13,270 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1510729620] [2019-10-15 01:37:13,270 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