java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/transpose-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 21:48:58,176 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 21:48:58,178 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 21:48:58,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 21:48:58,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 21:48:58,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 21:48:58,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 21:48:58,195 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 21:48:58,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 21:48:58,198 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 21:48:58,199 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 21:48:58,200 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 21:48:58,200 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 21:48:58,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 21:48:58,202 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 21:48:58,203 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 21:48:58,204 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 21:48:58,205 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 21:48:58,207 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 21:48:58,208 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 21:48:58,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 21:48:58,211 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 21:48:58,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 21:48:58,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 21:48:58,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-14 21:48:58,215 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-14 21:48:58,215 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-14 21:48:58,216 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-14 21:48:58,216 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-14 21:48:58,217 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-14 21:48:58,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 21:48:58,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 21:48:58,219 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 21:48:58,220 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 21:48:58,221 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 21:48:58,221 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 21:48:58,222 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 21:48:58,222 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 21:48:58,222 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 21:48:58,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 21:48:58,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 21:48:58,228 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 [2019-10-14 21:48:58,251 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 21:48:58,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 21:48:58,253 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 21:48:58,253 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 21:48:58,253 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 21:48:58,253 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 21:48:58,254 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 21:48:58,254 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 21:48:58,254 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 21:48:58,254 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 21:48:58,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 21:48:58,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 21:48:58,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 21:48:58,255 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 21:48:58,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 21:48:58,255 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 21:48:58,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 21:48:58,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 21:48:58,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 21:48:58,256 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 21:48:58,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 21:48:58,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 21:48:58,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 21:48:58,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 21:48:58,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 21:48:58,257 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 21:48:58,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 21:48:58,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 21:48:58,258 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 21:48:58,531 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 21:48:58,543 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 21:48:58,547 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 21:48:58,549 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 21:48:58,549 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 21:48:58,550 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/transpose-u.c [2019-10-14 21:48:58,618 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67875c9c9/8ea0af0d2a264f00b302f7ee3834aa31/FLAG4d4b90654 [2019-10-14 21:48:59,078 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 21:48:59,079 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/transpose-u.c [2019-10-14 21:48:59,087 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67875c9c9/8ea0af0d2a264f00b302f7ee3834aa31/FLAG4d4b90654 [2019-10-14 21:48:59,423 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/67875c9c9/8ea0af0d2a264f00b302f7ee3834aa31 [2019-10-14 21:48:59,433 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 21:48:59,434 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 21:48:59,435 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:59,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 21:48:59,439 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 21:48:59,440 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:59" (1/1) ... [2019-10-14 21:48:59,442 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d46bbee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:59, skipping insertion in model container [2019-10-14 21:48:59,443 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 09:48:59" (1/1) ... [2019-10-14 21:48:59,449 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 21:48:59,463 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 21:48:59,637 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:59,641 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 21:48:59,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 21:48:59,767 INFO L192 MainTranslator]: Completed translation [2019-10-14 21:48:59,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:59 WrapperNode [2019-10-14 21:48:59,767 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 21:48:59,768 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 21:48:59,768 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 21:48:59,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 21:48:59,779 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:59" (1/1) ... [2019-10-14 21:48:59,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:59" (1/1) ... [2019-10-14 21:48:59,786 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:59" (1/1) ... [2019-10-14 21:48:59,787 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:59" (1/1) ... [2019-10-14 21:48:59,794 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:59" (1/1) ... [2019-10-14 21:48:59,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:59" (1/1) ... [2019-10-14 21:48:59,807 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:59" (1/1) ... [2019-10-14 21:48:59,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 21:48:59,810 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 21:48:59,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 21:48:59,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 21:48:59,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:59" (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 [2019-10-14 21:48:59,866 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 21:48:59,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 21:48:59,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-10-14 21:48:59,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 21:48:59,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 21:48:59,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 21:48:59,867 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 21:48:59,868 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 21:48:59,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-14 21:48:59,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-14 21:48:59,868 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-14 21:48:59,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-14 21:48:59,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 21:48:59,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 21:49:00,122 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 21:49:00,123 INFO L284 CfgBuilder]: Removed 6 assume(true) statements. [2019-10-14 21:49:00,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:49:00 BoogieIcfgContainer [2019-10-14 21:49:00,125 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 21:49:00,126 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 21:49:00,126 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 21:49:00,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 21:49:00,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 09:48:59" (1/3) ... [2019-10-14 21:49:00,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e449c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:49:00, skipping insertion in model container [2019-10-14 21:49:00,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 09:48:59" (2/3) ... [2019-10-14 21:49:00,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e449c46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 09:49:00, skipping insertion in model container [2019-10-14 21:49:00,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 09:49:00" (3/3) ... [2019-10-14 21:49:00,135 INFO L109 eAbstractionObserver]: Analyzing ICFG transpose-u.c [2019-10-14 21:49:00,145 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 21:49:00,153 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 21:49:00,167 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 21:49:00,213 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 21:49:00,213 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 21:49:00,214 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 21:49:00,214 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 21:49:00,214 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 21:49:00,214 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 21:49:00,214 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 21:49:00,215 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 21:49:00,235 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2019-10-14 21:49:00,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 21:49:00,242 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:00,243 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:00,245 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:00,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:00,252 INFO L82 PathProgramCache]: Analyzing trace with hash -869876316, now seen corresponding path program 1 times [2019-10-14 21:49:00,260 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:00,261 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016356549] [2019-10-14 21:49:00,261 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:00,261 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:00,262 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:00,341 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:00,342 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [676815427] [2019-10-14 21:49:00,342 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 [2019-10-14 21:49:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:00,416 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:49:00,422 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:00,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:00,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016356549] [2019-10-14 21:49:00,474 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:00,474 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676815427] [2019-10-14 21:49:00,475 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:00,475 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-14 21:49:00,476 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685873642] [2019-10-14 21:49:00,480 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-14 21:49:00,481 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:00,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-14 21:49:00,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:49:00,498 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 3 states. [2019-10-14 21:49:00,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:00,599 INFO L93 Difference]: Finished difference Result 62 states and 91 transitions. [2019-10-14 21:49:00,600 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-14 21:49:00,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 16 [2019-10-14 21:49:00,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:00,613 INFO L225 Difference]: With dead ends: 62 [2019-10-14 21:49:00,613 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 21:49:00,616 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-14 21:49:00,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 21:49:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2019-10-14 21:49:00,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 21:49:00,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2019-10-14 21:49:00,657 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 16 [2019-10-14 21:49:00,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:00,657 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2019-10-14 21:49:00,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-14 21:49:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2019-10-14 21:49:00,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 21:49:00,659 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:00,659 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:00,860 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:00,861 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:00,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:00,862 INFO L82 PathProgramCache]: Analyzing trace with hash 774791125, now seen corresponding path program 1 times [2019-10-14 21:49:00,862 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:00,863 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647019989] [2019-10-14 21:49:00,863 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:00,863 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:00,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:00,873 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:00,874 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889426709] [2019-10-14 21:49:00,874 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 [2019-10-14 21:49:00,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:00,940 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:49:00,942 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:00,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:00,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647019989] [2019-10-14 21:49:00,978 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:00,978 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889426709] [2019-10-14 21:49:00,979 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:00,980 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:49:00,981 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529533148] [2019-10-14 21:49:00,984 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:49:00,985 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:00,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:49:00,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:49:00,986 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2019-10-14 21:49:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:01,088 INFO L93 Difference]: Finished difference Result 59 states and 74 transitions. [2019-10-14 21:49:01,089 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:49:01,089 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-10-14 21:49:01,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:01,092 INFO L225 Difference]: With dead ends: 59 [2019-10-14 21:49:01,092 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 21:49:01,093 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:49:01,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 21:49:01,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2019-10-14 21:49:01,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 21:49:01,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2019-10-14 21:49:01,105 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 19 [2019-10-14 21:49:01,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:01,106 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2019-10-14 21:49:01,106 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:49:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2019-10-14 21:49:01,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 21:49:01,107 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:01,107 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:01,311 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:01,312 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:01,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:01,313 INFO L82 PathProgramCache]: Analyzing trace with hash -100218697, now seen corresponding path program 1 times [2019-10-14 21:49:01,313 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:01,314 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535534924] [2019-10-14 21:49:01,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:01,314 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:01,314 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:01,329 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:01,330 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697626897] [2019-10-14 21:49:01,330 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 [2019-10-14 21:49:01,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:01,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:49:01,382 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 21:49:01,425 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535534924] [2019-10-14 21:49:01,426 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:01,426 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697626897] [2019-10-14 21:49:01,426 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:01,427 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-10-14 21:49:01,427 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767891567] [2019-10-14 21:49:01,428 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-14 21:49:01,428 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:01,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-14 21:49:01,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:49:01,429 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 5 states. [2019-10-14 21:49:01,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:01,539 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2019-10-14 21:49:01,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 21:49:01,540 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2019-10-14 21:49:01,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:01,541 INFO L225 Difference]: With dead ends: 69 [2019-10-14 21:49:01,541 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 21:49:01,542 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-10-14 21:49:01,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 21:49:01,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 38. [2019-10-14 21:49:01,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 21:49:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2019-10-14 21:49:01,551 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 21 [2019-10-14 21:49:01,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:01,551 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2019-10-14 21:49:01,551 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-14 21:49:01,552 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2019-10-14 21:49:01,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 21:49:01,552 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:01,553 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:01,762 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:01,763 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:01,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:01,764 INFO L82 PathProgramCache]: Analyzing trace with hash 828932377, now seen corresponding path program 2 times [2019-10-14 21:49:01,765 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:01,765 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167885618] [2019-10-14 21:49:01,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:01,766 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:01,766 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:01,775 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:01,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [104613838] [2019-10-14 21:49:01,775 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-10-14 21:49:01,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-10-14 21:49:01,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:01,836 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-14 21:49:01,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:01,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-10-14 21:49:01,871 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167885618] [2019-10-14 21:49:01,871 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:01,875 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104613838] [2019-10-14 21:49:01,876 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 21:49:01,876 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 21:49:01,876 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180157251] [2019-10-14 21:49:01,877 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:49:01,877 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:01,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:49:01,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:49:01,878 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 4 states. [2019-10-14 21:49:01,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:01,968 INFO L93 Difference]: Finished difference Result 78 states and 92 transitions. [2019-10-14 21:49:01,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:49:01,968 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 23 [2019-10-14 21:49:01,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:01,970 INFO L225 Difference]: With dead ends: 78 [2019-10-14 21:49:01,970 INFO L226 Difference]: Without dead ends: 60 [2019-10-14 21:49:01,970 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:49:01,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-10-14 21:49:01,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 39. [2019-10-14 21:49:01,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 21:49:01,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2019-10-14 21:49:01,980 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 23 [2019-10-14 21:49:01,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:01,980 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2019-10-14 21:49:01,980 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:49:01,981 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2019-10-14 21:49:01,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 21:49:01,981 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:01,982 INFO L380 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:02,185 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:02,190 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:02,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:02,190 INFO L82 PathProgramCache]: Analyzing trace with hash -27094831, now seen corresponding path program 1 times [2019-10-14 21:49:02,190 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:02,191 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729641636] [2019-10-14 21:49:02,191 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:02,191 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:02,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:02,199 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:02,200 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [745701687] [2019-10-14 21:49:02,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-10-14 21:49:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 21:49:02,260 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2019-10-14 21:49:02,262 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-14 21:49:02,305 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729641636] [2019-10-14 21:49:02,306 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:02,307 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745701687] [2019-10-14 21:49:02,307 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:02,307 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-14 21:49:02,307 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106928890] [2019-10-14 21:49:02,308 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-14 21:49:02,309 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:02,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-14 21:49:02,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:49:02,309 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand 6 states. [2019-10-14 21:49:02,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:02,424 INFO L93 Difference]: Finished difference Result 82 states and 99 transitions. [2019-10-14 21:49:02,424 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-14 21:49:02,424 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 28 [2019-10-14 21:49:02,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:02,425 INFO L225 Difference]: With dead ends: 82 [2019-10-14 21:49:02,426 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 21:49:02,427 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-10-14 21:49:02,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 21:49:02,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2019-10-14 21:49:02,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 21:49:02,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2019-10-14 21:49:02,446 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 28 [2019-10-14 21:49:02,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:02,446 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2019-10-14 21:49:02,451 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-14 21:49:02,451 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2019-10-14 21:49:02,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 21:49:02,452 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:02,453 INFO L380 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:02,653 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:02,654 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:02,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:02,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1170331446, now seen corresponding path program 2 times [2019-10-14 21:49:02,654 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:02,654 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726716285] [2019-10-14 21:49:02,655 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:02,655 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:02,655 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:02,663 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:02,663 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686388519] [2019-10-14 21:49:02,664 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2019-10-14 21:49:02,708 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 21:49:02,708 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:02,709 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-14 21:49:02,711 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:02,768 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-10-14 21:49:02,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726716285] [2019-10-14 21:49:02,769 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:02,769 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686388519] [2019-10-14 21:49:02,769 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:02,770 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-14 21:49:02,770 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550531500] [2019-10-14 21:49:02,770 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-14 21:49:02,770 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:02,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-14 21:49:02,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:49:02,771 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 7 states. [2019-10-14 21:49:02,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:02,892 INFO L93 Difference]: Finished difference Result 96 states and 115 transitions. [2019-10-14 21:49:02,893 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-14 21:49:02,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2019-10-14 21:49:02,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:02,894 INFO L225 Difference]: With dead ends: 96 [2019-10-14 21:49:02,894 INFO L226 Difference]: Without dead ends: 57 [2019-10-14 21:49:02,895 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-10-14 21:49:02,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-10-14 21:49:02,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 53. [2019-10-14 21:49:02,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-10-14 21:49:02,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2019-10-14 21:49:02,907 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 31 [2019-10-14 21:49:02,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:02,907 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2019-10-14 21:49:02,907 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-14 21:49:02,907 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2019-10-14 21:49:02,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 21:49:02,908 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:02,908 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:03,114 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:03,115 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:03,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:03,115 INFO L82 PathProgramCache]: Analyzing trace with hash -195694611, now seen corresponding path program 3 times [2019-10-14 21:49:03,116 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:03,116 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726587527] [2019-10-14 21:49:03,116 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:03,116 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:03,116 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:03,123 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:03,124 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126280023] [2019-10-14 21:49:03,124 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 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 [2019-10-14 21:49:03,167 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-10-14 21:49:03,167 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:03,168 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 21:49:03,170 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:03,203 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-14 21:49:03,203 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726587527] [2019-10-14 21:49:03,203 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:03,203 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126280023] [2019-10-14 21:49:03,204 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:03,204 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-10-14 21:49:03,209 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211574099] [2019-10-14 21:49:03,210 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 21:49:03,210 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:03,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 21:49:03,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:49:03,212 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 4 states. [2019-10-14 21:49:03,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:03,283 INFO L93 Difference]: Finished difference Result 109 states and 126 transitions. [2019-10-14 21:49:03,283 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 21:49:03,283 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-10-14 21:49:03,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:03,284 INFO L225 Difference]: With dead ends: 109 [2019-10-14 21:49:03,285 INFO L226 Difference]: Without dead ends: 74 [2019-10-14 21:49:03,285 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-14 21:49:03,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-10-14 21:49:03,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 64. [2019-10-14 21:49:03,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-10-14 21:49:03,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2019-10-14 21:49:03,306 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 34 [2019-10-14 21:49:03,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:03,309 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2019-10-14 21:49:03,309 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 21:49:03,310 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2019-10-14 21:49:03,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 21:49:03,311 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:03,311 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:03,518 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:03,519 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:03,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:03,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1213445734, now seen corresponding path program 4 times [2019-10-14 21:49:03,521 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:03,521 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925654167] [2019-10-14 21:49:03,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:03,521 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:03,522 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:03,530 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:03,530 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [969940039] [2019-10-14 21:49:03,530 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 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 [2019-10-14 21:49:03,575 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 21:49:03,576 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 21:49:03,577 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 21:49:03,590 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 21:49:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-14 21:49:03,712 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925654167] [2019-10-14 21:49:03,712 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 21:49:03,712 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969940039] [2019-10-14 21:49:03,713 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 21:49:03,713 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-14 21:49:03,713 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563421317] [2019-10-14 21:49:03,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 21:49:03,714 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 21:49:03,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 21:49:03,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-14 21:49:03,716 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 9 states. [2019-10-14 21:49:03,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 21:49:03,919 INFO L93 Difference]: Finished difference Result 151 states and 178 transitions. [2019-10-14 21:49:03,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 21:49:03,920 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 45 [2019-10-14 21:49:03,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 21:49:03,921 INFO L225 Difference]: With dead ends: 151 [2019-10-14 21:49:03,922 INFO L226 Difference]: Without dead ends: 125 [2019-10-14 21:49:03,922 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2019-10-14 21:49:03,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-10-14 21:49:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 71. [2019-10-14 21:49:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-10-14 21:49:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2019-10-14 21:49:03,935 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 45 [2019-10-14 21:49:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 21:49:03,935 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2019-10-14 21:49:03,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 21:49:03,936 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2019-10-14 21:49:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-14 21:49:03,937 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 21:49:03,937 INFO L380 BasicCegarLoop]: trace histogram [8, 8, 8, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 21:49:04,140 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 21:49:04,141 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 21:49:04,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 21:49:04,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1509397052, now seen corresponding path program 5 times [2019-10-14 21:49:04,141 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 21:49:04,141 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346892749] [2019-10-14 21:49:04,142 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:04,142 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 21:49:04,142 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 21:49:04,148 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 21:49:04,149 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106081593] [2019-10-14 21:49:04,149 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true