/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-multidimensional/copy-partial-3-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:40:25,133 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:40:25,136 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:40:25,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:40:25,147 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:40:25,148 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:40:25,149 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:40:25,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:40:25,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:40:25,154 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:40:25,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:40:25,155 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:40:25,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:40:25,157 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:40:25,157 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:40:25,158 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:40:25,159 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:40:25,160 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:40:25,162 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:40:25,163 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:40:25,165 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:40:25,166 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:40:25,167 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:40:25,168 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:40:25,170 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:40:25,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:40:25,178 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:40:25,179 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:40:25,179 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 [2019-11-23 20:40:25,197 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:40:25,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:40:25,199 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:40:25,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:40:25,200 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:40:25,200 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:40:25,200 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:40:25,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:40:25,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:40:25,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:40:25,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:40:25,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:40:25,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:40:25,202 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:40:25,203 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:40:25,203 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:40:25,203 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:40:25,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:40:25,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:40:25,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:40:25,204 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:40:25,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:40:25,204 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:40:25,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:40:25,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:40:25,205 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:40:25,205 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:40:25,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:40:25,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:40:25,206 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:40:25,465 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:40:25,477 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:40:25,481 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:40:25,482 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:40:25,482 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:40:25,483 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-partial-3-u.c [2019-11-23 20:40:25,554 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/779608589/38bca10abcd948bd9a481452eed685e5/FLAG552fe6998 [2019-11-23 20:40:25,997 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:40:25,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-partial-3-u.c [2019-11-23 20:40:26,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/779608589/38bca10abcd948bd9a481452eed685e5/FLAG552fe6998 [2019-11-23 20:40:26,417 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/779608589/38bca10abcd948bd9a481452eed685e5 [2019-11-23 20:40:26,426 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:40:26,427 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:40:26,428 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:40:26,428 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:40:26,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:40:26,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:40:26" (1/1) ... [2019-11-23 20:40:26,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ee337c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:26, skipping insertion in model container [2019-11-23 20:40:26,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:40:26" (1/1) ... [2019-11-23 20:40:26,442 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:40:26,468 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:40:26,669 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:40:26,673 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:40:26,702 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:40:26,797 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:40:26,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:26 WrapperNode [2019-11-23 20:40:26,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:40:26,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:40:26,799 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:40:26,799 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:40:26,807 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:26" (1/1) ... [2019-11-23 20:40:26,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:26" (1/1) ... [2019-11-23 20:40:26,842 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:40:26,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:40:26,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:40:26,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:40:26,852 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:26" (1/1) ... [2019-11-23 20:40:26,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:26" (1/1) ... [2019-11-23 20:40:26,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:26" (1/1) ... [2019-11-23 20:40:26,855 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:26" (1/1) ... [2019-11-23 20:40:26,860 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:26" (1/1) ... [2019-11-23 20:40:26,871 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:26" (1/1) ... [2019-11-23 20:40:26,873 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:26" (1/1) ... [2019-11-23 20:40:26,882 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:40:26,882 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:40:26,882 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:40:26,882 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:40:26,883 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:26" (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 [2019-11-23 20:40:26,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:40:26,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:40:26,938 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:40:26,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:40:26,938 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:40:26,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:40:27,295 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:40:27,295 INFO L284 CfgBuilder]: Removed 18 assume(true) statements. [2019-11-23 20:40:27,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:40:27 BoogieIcfgContainer [2019-11-23 20:40:27,297 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:40:27,298 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:40:27,298 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:40:27,301 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:40:27,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:40:26" (1/3) ... [2019-11-23 20:40:27,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200eb670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:40:27, skipping insertion in model container [2019-11-23 20:40:27,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:26" (2/3) ... [2019-11-23 20:40:27,302 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@200eb670 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:40:27, skipping insertion in model container [2019-11-23 20:40:27,302 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:40:27" (3/3) ... [2019-11-23 20:40:27,304 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-partial-3-u.c [2019-11-23 20:40:27,311 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:40:27,317 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:40:27,326 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:40:27,349 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:40:27,350 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:40:27,350 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:40:27,350 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:40:27,350 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:40:27,350 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:40:27,350 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:40:27,351 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:40:27,364 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-11-23 20:40:27,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:40:27,369 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:27,370 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:27,370 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:27,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:27,375 INFO L82 PathProgramCache]: Analyzing trace with hash 44320836, now seen corresponding path program 1 times [2019-11-23 20:40:27,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:27,383 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099324542] [2019-11-23 20:40:27,383 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:27,449 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:27,449 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442696970] [2019-11-23 20:40:27,449 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 [2019-11-23 20:40:27,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:27,510 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2019-11-23 20:40:27,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:40:27,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099324542] [2019-11-23 20:40:27,531 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:27,531 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442696970] [2019-11-23 20:40:27,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:27,532 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:40:27,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678994153] [2019-11-23 20:40:27,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:40:27,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:27,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:40:27,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:40:27,551 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 2 states. [2019-11-23 20:40:27,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:27,570 INFO L93 Difference]: Finished difference Result 64 states and 112 transitions. [2019-11-23 20:40:27,570 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:40:27,571 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 13 [2019-11-23 20:40:27,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:27,579 INFO L225 Difference]: With dead ends: 64 [2019-11-23 20:40:27,579 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:40:27,582 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:40:27,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:40:27,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 20:40:27,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:40:27,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2019-11-23 20:40:27,615 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 13 [2019-11-23 20:40:27,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:27,616 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2019-11-23 20:40:27,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:40:27,616 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2019-11-23 20:40:27,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:40:27,617 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:27,617 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:27,819 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:27,822 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:27,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:27,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1557947400, now seen corresponding path program 1 times [2019-11-23 20:40:27,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:27,824 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060781362] [2019-11-23 20:40:27,824 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:27,836 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:27,837 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337030575] [2019-11-23 20:40:27,837 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 [2019-11-23 20:40:27,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:27,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:27,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:27,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:40:27,921 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060781362] [2019-11-23 20:40:27,922 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:27,922 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337030575] [2019-11-23 20:40:27,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:27,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:40:27,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437468570] [2019-11-23 20:40:27,924 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:40:27,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:27,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:40:27,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:40:27,926 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand 3 states. [2019-11-23 20:40:27,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:27,998 INFO L93 Difference]: Finished difference Result 56 states and 78 transitions. [2019-11-23 20:40:27,998 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:40:27,998 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-23 20:40:27,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:28,000 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:40:28,000 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:40:28,001 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:40:28,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:40:28,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2019-11-23 20:40:28,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:40:28,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 41 transitions. [2019-11-23 20:40:28,007 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 41 transitions. Word has length 13 [2019-11-23 20:40:28,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:28,008 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 41 transitions. [2019-11-23 20:40:28,008 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:40:28,008 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 41 transitions. [2019-11-23 20:40:28,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 20:40:28,009 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:28,009 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:28,219 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:28,219 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:28,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:28,220 INFO L82 PathProgramCache]: Analyzing trace with hash 107415504, now seen corresponding path program 1 times [2019-11-23 20:40:28,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:28,220 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021218276] [2019-11-23 20:40:28,221 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:28,232 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:28,233 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [703776670] [2019-11-23 20:40:28,233 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 [2019-11-23 20:40:28,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:28,287 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:28,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:28,316 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:40:28,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021218276] [2019-11-23 20:40:28,317 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:28,317 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703776670] [2019-11-23 20:40:28,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:28,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:40:28,318 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784203388] [2019-11-23 20:40:28,320 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:28,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:28,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:28,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:28,321 INFO L87 Difference]: Start difference. First operand 30 states and 41 transitions. Second operand 4 states. [2019-11-23 20:40:28,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:28,448 INFO L93 Difference]: Finished difference Result 76 states and 106 transitions. [2019-11-23 20:40:28,448 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:28,449 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-23 20:40:28,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:28,450 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:40:28,450 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 20:40:28,451 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:28,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 20:40:28,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 32. [2019-11-23 20:40:28,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:40:28,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2019-11-23 20:40:28,466 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 16 [2019-11-23 20:40:28,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:28,466 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2019-11-23 20:40:28,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:28,467 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2019-11-23 20:40:28,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:40:28,468 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:28,468 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:28,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:28,671 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:28,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1823561702, now seen corresponding path program 1 times [2019-11-23 20:40:28,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:28,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703613096] [2019-11-23 20:40:28,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:28,695 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:28,700 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [389252536] [2019-11-23 20:40:28,700 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 [2019-11-23 20:40:28,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:28,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:28,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:40:28,767 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703613096] [2019-11-23 20:40:28,767 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:28,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389252536] [2019-11-23 20:40:28,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:28,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:40:28,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521876375] [2019-11-23 20:40:28,769 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:28,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:28,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:28,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:28,770 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand 4 states. [2019-11-23 20:40:28,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:28,885 INFO L93 Difference]: Finished difference Result 78 states and 107 transitions. [2019-11-23 20:40:28,885 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:28,886 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-23 20:40:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:28,886 INFO L225 Difference]: With dead ends: 78 [2019-11-23 20:40:28,887 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 20:40:28,887 INFO L630 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 [2019-11-23 20:40:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 20:40:28,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 34. [2019-11-23 20:40:28,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:40:28,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 45 transitions. [2019-11-23 20:40:28,903 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 45 transitions. Word has length 19 [2019-11-23 20:40:28,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:28,903 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 45 transitions. [2019-11-23 20:40:28,906 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:28,907 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 45 transitions. [2019-11-23 20:40:28,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:40:28,907 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:28,907 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:29,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:29,109 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:29,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:29,109 INFO L82 PathProgramCache]: Analyzing trace with hash -633878399, now seen corresponding path program 1 times [2019-11-23 20:40:29,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:29,110 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179086636] [2019-11-23 20:40:29,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:29,115 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:29,116 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037832539] [2019-11-23 20:40:29,116 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 [2019-11-23 20:40:29,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:29,175 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:40:29,176 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:29,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:40:29,203 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179086636] [2019-11-23 20:40:29,203 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:29,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037832539] [2019-11-23 20:40:29,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:29,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:40:29,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644325386] [2019-11-23 20:40:29,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:40:29,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:29,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:40:29,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:29,206 INFO L87 Difference]: Start difference. First operand 34 states and 45 transitions. Second operand 5 states. [2019-11-23 20:40:29,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:29,348 INFO L93 Difference]: Finished difference Result 96 states and 130 transitions. [2019-11-23 20:40:29,349 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:40:29,349 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2019-11-23 20:40:29,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:29,352 INFO L225 Difference]: With dead ends: 96 [2019-11-23 20:40:29,352 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 20:40:29,353 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:29,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 20:40:29,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 38. [2019-11-23 20:40:29,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-11-23 20:40:29,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 50 transitions. [2019-11-23 20:40:29,375 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 50 transitions. Word has length 20 [2019-11-23 20:40:29,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:29,375 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 50 transitions. [2019-11-23 20:40:29,375 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:40:29,376 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 50 transitions. [2019-11-23 20:40:29,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-23 20:40:29,376 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:29,376 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:29,582 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:29,583 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:29,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:29,584 INFO L82 PathProgramCache]: Analyzing trace with hash 494889798, now seen corresponding path program 2 times [2019-11-23 20:40:29,584 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:29,585 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516810856] [2019-11-23 20:40:29,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:29,591 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:29,592 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892340001] [2019-11-23 20:40:29,592 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 [2019-11-23 20:40:29,639 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:40:29,639 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:29,640 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:29,641 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:29,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2019-11-23 20:40:29,653 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516810856] [2019-11-23 20:40:29,654 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:29,654 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892340001] [2019-11-23 20:40:29,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:29,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:40:29,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657571338] [2019-11-23 20:40:29,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:29,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:29,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:29,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:29,656 INFO L87 Difference]: Start difference. First operand 38 states and 50 transitions. Second operand 4 states. [2019-11-23 20:40:29,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:29,717 INFO L93 Difference]: Finished difference Result 85 states and 111 transitions. [2019-11-23 20:40:29,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:29,718 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2019-11-23 20:40:29,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:29,718 INFO L225 Difference]: With dead ends: 85 [2019-11-23 20:40:29,719 INFO L226 Difference]: Without dead ends: 64 [2019-11-23 20:40:29,719 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:29,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-11-23 20:40:29,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 39. [2019-11-23 20:40:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 20:40:29,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2019-11-23 20:40:29,727 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 21 [2019-11-23 20:40:29,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:29,727 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2019-11-23 20:40:29,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:29,728 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2019-11-23 20:40:29,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 20:40:29,728 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:29,728 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:29,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:29,940 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:29,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:29,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1054198933, now seen corresponding path program 1 times [2019-11-23 20:40:29,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:29,942 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566747506] [2019-11-23 20:40:29,942 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:29,947 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:29,947 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [410421906] [2019-11-23 20:40:29,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:29,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:40:29,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:40:30,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566747506] [2019-11-23 20:40:30,039 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:30,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410421906] [2019-11-23 20:40:30,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:30,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:40:30,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409080606] [2019-11-23 20:40:30,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:40:30,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:30,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:40:30,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:40:30,042 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand 6 states. [2019-11-23 20:40:30,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:30,207 INFO L93 Difference]: Finished difference Result 118 states and 158 transitions. [2019-11-23 20:40:30,208 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:40:30,208 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2019-11-23 20:40:30,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:30,209 INFO L225 Difference]: With dead ends: 118 [2019-11-23 20:40:30,209 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 20:40:30,210 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:40:30,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 20:40:30,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 43. [2019-11-23 20:40:30,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 20:40:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 56 transitions. [2019-11-23 20:40:30,224 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 56 transitions. Word has length 24 [2019-11-23 20:40:30,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:30,224 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 56 transitions. [2019-11-23 20:40:30,224 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:40:30,224 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 56 transitions. [2019-11-23 20:40:30,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:40:30,226 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:30,226 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:30,437 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:30,438 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:30,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:30,438 INFO L82 PathProgramCache]: Analyzing trace with hash -22484048, now seen corresponding path program 2 times [2019-11-23 20:40:30,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:30,439 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153104986] [2019-11-23 20:40:30,439 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:30,443 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:30,444 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042083193] [2019-11-23 20:40:30,444 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 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 [2019-11-23 20:40:30,485 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:40:30,485 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:30,486 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:40:30,488 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:30,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:40:30,509 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153104986] [2019-11-23 20:40:30,509 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:30,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042083193] [2019-11-23 20:40:30,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:30,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:40:30,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316017195] [2019-11-23 20:40:30,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:30,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:30,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:30,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:30,512 INFO L87 Difference]: Start difference. First operand 43 states and 56 transitions. Second operand 4 states. [2019-11-23 20:40:30,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:30,624 INFO L93 Difference]: Finished difference Result 91 states and 117 transitions. [2019-11-23 20:40:30,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:30,626 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2019-11-23 20:40:30,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:30,627 INFO L225 Difference]: With dead ends: 91 [2019-11-23 20:40:30,627 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:40:30,628 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:40:30,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 44. [2019-11-23 20:40:30,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:40:30,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 57 transitions. [2019-11-23 20:40:30,637 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 57 transitions. Word has length 25 [2019-11-23 20:40:30,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:30,637 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 57 transitions. [2019-11-23 20:40:30,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:30,638 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 57 transitions. [2019-11-23 20:40:30,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:40:30,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:30,639 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:30,851 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:30,852 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:30,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:30,853 INFO L82 PathProgramCache]: Analyzing trace with hash -683517798, now seen corresponding path program 1 times [2019-11-23 20:40:30,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:30,853 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457162769] [2019-11-23 20:40:30,854 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:30,858 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:30,859 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [83820638] [2019-11-23 20:40:30,859 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-23 20:40:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:30,903 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:40:30,905 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:40:30,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457162769] [2019-11-23 20:40:30,964 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:30,964 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83820638] [2019-11-23 20:40:30,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:30,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:40:30,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594807410] [2019-11-23 20:40:30,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:40:30,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:30,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:40:30,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:40:30,967 INFO L87 Difference]: Start difference. First operand 44 states and 57 transitions. Second operand 7 states. [2019-11-23 20:40:31,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:31,153 INFO L93 Difference]: Finished difference Result 144 states and 190 transitions. [2019-11-23 20:40:31,154 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:40:31,154 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 28 [2019-11-23 20:40:31,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:31,155 INFO L225 Difference]: With dead ends: 144 [2019-11-23 20:40:31,155 INFO L226 Difference]: Without dead ends: 103 [2019-11-23 20:40:31,156 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:40:31,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-23 20:40:31,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 48. [2019-11-23 20:40:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-11-23 20:40:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 62 transitions. [2019-11-23 20:40:31,169 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 62 transitions. Word has length 28 [2019-11-23 20:40:31,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:31,170 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 62 transitions. [2019-11-23 20:40:31,170 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:40:31,170 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 62 transitions. [2019-11-23 20:40:31,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-23 20:40:31,171 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:31,171 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:31,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:31,380 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:31,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:31,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1248945759, now seen corresponding path program 2 times [2019-11-23 20:40:31,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:31,382 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412300659] [2019-11-23 20:40:31,382 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:31,387 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:31,387 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1152564946] [2019-11-23 20:40:31,387 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:31,432 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:40:31,433 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:31,433 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:40:31,435 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:40:31,488 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412300659] [2019-11-23 20:40:31,488 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:31,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152564946] [2019-11-23 20:40:31,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:31,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 20:40:31,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567754078] [2019-11-23 20:40:31,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:40:31,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:31,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:40:31,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:40:31,490 INFO L87 Difference]: Start difference. First operand 48 states and 62 transitions. Second operand 8 states. [2019-11-23 20:40:31,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:31,659 INFO L93 Difference]: Finished difference Result 165 states and 217 transitions. [2019-11-23 20:40:31,659 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:40:31,659 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2019-11-23 20:40:31,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:31,660 INFO L225 Difference]: With dead ends: 165 [2019-11-23 20:40:31,660 INFO L226 Difference]: Without dead ends: 120 [2019-11-23 20:40:31,661 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:40:31,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-23 20:40:31,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 52. [2019-11-23 20:40:31,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:40:31,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 67 transitions. [2019-11-23 20:40:31,672 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 67 transitions. Word has length 29 [2019-11-23 20:40:31,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:31,673 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 67 transitions. [2019-11-23 20:40:31,673 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:40:31,673 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 67 transitions. [2019-11-23 20:40:31,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:40:31,674 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:31,674 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:31,877 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:31,878 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:31,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:31,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1025773882, now seen corresponding path program 3 times [2019-11-23 20:40:31,878 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:31,878 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053010982] [2019-11-23 20:40:31,879 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:31,883 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:31,883 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1705559737] [2019-11-23 20:40:31,883 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:31,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:40:31,923 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:31,924 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:31,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:31,975 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:40:31,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053010982] [2019-11-23 20:40:31,976 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:31,976 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705559737] [2019-11-23 20:40:31,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:31,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:40:31,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034444972] [2019-11-23 20:40:31,977 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:31,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:31,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:31,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:31,978 INFO L87 Difference]: Start difference. First operand 52 states and 67 transitions. Second operand 4 states. [2019-11-23 20:40:32,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:32,054 INFO L93 Difference]: Finished difference Result 118 states and 153 transitions. [2019-11-23 20:40:32,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:32,055 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2019-11-23 20:40:32,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:32,056 INFO L225 Difference]: With dead ends: 118 [2019-11-23 20:40:32,056 INFO L226 Difference]: Without dead ends: 82 [2019-11-23 20:40:32,057 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-11-23 20:40:32,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 53. [2019-11-23 20:40:32,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:40:32,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2019-11-23 20:40:32,067 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 30 [2019-11-23 20:40:32,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:32,067 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2019-11-23 20:40:32,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:32,067 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2019-11-23 20:40:32,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-23 20:40:32,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:32,068 INFO L410 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:32,271 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:32,272 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:32,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:32,272 INFO L82 PathProgramCache]: Analyzing trace with hash -570232277, now seen corresponding path program 1 times [2019-11-23 20:40:32,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:32,273 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757242089] [2019-11-23 20:40:32,273 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:32,278 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:32,279 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720809051] [2019-11-23 20:40:32,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:32,326 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:40:32,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:40:32,414 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757242089] [2019-11-23 20:40:32,415 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:32,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720809051] [2019-11-23 20:40:32,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:32,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:40:32,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048934177] [2019-11-23 20:40:32,416 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:40:32,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:32,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:40:32,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:40:32,417 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand 9 states. [2019-11-23 20:40:32,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:32,608 INFO L93 Difference]: Finished difference Result 188 states and 246 transitions. [2019-11-23 20:40:32,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:40:32,608 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2019-11-23 20:40:32,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:32,610 INFO L225 Difference]: With dead ends: 188 [2019-11-23 20:40:32,610 INFO L226 Difference]: Without dead ends: 138 [2019-11-23 20:40:32,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:40:32,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2019-11-23 20:40:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 57. [2019-11-23 20:40:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 20:40:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 73 transitions. [2019-11-23 20:40:32,625 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 73 transitions. Word has length 33 [2019-11-23 20:40:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:32,625 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 73 transitions. [2019-11-23 20:40:32,625 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:40:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 73 transitions. [2019-11-23 20:40:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 20:40:32,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:32,629 INFO L410 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:32,831 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:32,831 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:32,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:32,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1889618042, now seen corresponding path program 2 times [2019-11-23 20:40:32,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:32,833 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424187862] [2019-11-23 20:40:32,833 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:32,839 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:32,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920914699] [2019-11-23 20:40:32,839 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:32,879 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:40:32,879 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:32,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:40:32,882 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:32,963 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-23 20:40:32,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424187862] [2019-11-23 20:40:32,963 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:32,963 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920914699] [2019-11-23 20:40:32,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:32,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 20:40:32,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936541472] [2019-11-23 20:40:32,964 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:40:32,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:32,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:40:32,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:40:32,965 INFO L87 Difference]: Start difference. First operand 57 states and 73 transitions. Second operand 10 states. [2019-11-23 20:40:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:33,161 INFO L93 Difference]: Finished difference Result 209 states and 273 transitions. [2019-11-23 20:40:33,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:40:33,161 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2019-11-23 20:40:33,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:33,162 INFO L225 Difference]: With dead ends: 209 [2019-11-23 20:40:33,163 INFO L226 Difference]: Without dead ends: 155 [2019-11-23 20:40:33,163 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:40:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2019-11-23 20:40:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2019-11-23 20:40:33,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 20:40:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 78 transitions. [2019-11-23 20:40:33,173 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 78 transitions. Word has length 34 [2019-11-23 20:40:33,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:33,173 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 78 transitions. [2019-11-23 20:40:33,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:40:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 78 transitions. [2019-11-23 20:40:33,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:40:33,174 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:33,174 INFO L410 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:33,378 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:33,378 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:33,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:33,379 INFO L82 PathProgramCache]: Analyzing trace with hash 159096203, now seen corresponding path program 3 times [2019-11-23 20:40:33,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:33,380 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017579775] [2019-11-23 20:40:33,380 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:33,384 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:33,385 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1006565731] [2019-11-23 20:40:33,385 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:33,437 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:40:33,437 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:33,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:40:33,439 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:33,510 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2019-11-23 20:40:33,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017579775] [2019-11-23 20:40:33,510 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:33,510 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006565731] [2019-11-23 20:40:33,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:33,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:40:33,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22388723] [2019-11-23 20:40:33,511 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:40:33,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:33,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:40:33,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:33,513 INFO L87 Difference]: Start difference. First operand 61 states and 78 transitions. Second operand 5 states. [2019-11-23 20:40:33,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:33,608 INFO L93 Difference]: Finished difference Result 193 states and 247 transitions. [2019-11-23 20:40:33,608 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:40:33,609 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2019-11-23 20:40:33,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:33,610 INFO L225 Difference]: With dead ends: 193 [2019-11-23 20:40:33,610 INFO L226 Difference]: Without dead ends: 156 [2019-11-23 20:40:33,612 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:33,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2019-11-23 20:40:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 67. [2019-11-23 20:40:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 20:40:33,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 86 transitions. [2019-11-23 20:40:33,628 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 86 transitions. Word has length 35 [2019-11-23 20:40:33,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:33,631 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 86 transitions. [2019-11-23 20:40:33,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:40:33,631 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 86 transitions. [2019-11-23 20:40:33,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:40:33,633 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:33,634 INFO L410 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 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] [2019-11-23 20:40:33,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:33,839 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:33,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:33,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2010620237, now seen corresponding path program 4 times [2019-11-23 20:40:33,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:33,840 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652503352] [2019-11-23 20:40:33,840 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:33,843 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:33,844 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398844558] [2019-11-23 20:40:33,844 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:33,875 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:40:33,875 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:33,876 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:40:33,877 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:33,930 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 20:40:33,930 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652503352] [2019-11-23 20:40:33,931 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:33,931 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398844558] [2019-11-23 20:40:33,931 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:33,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 20:40:33,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537690629] [2019-11-23 20:40:33,932 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:40:33,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:33,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:40:33,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:33,933 INFO L87 Difference]: Start difference. First operand 67 states and 86 transitions. Second operand 5 states. [2019-11-23 20:40:34,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:34,036 INFO L93 Difference]: Finished difference Result 120 states and 156 transitions. [2019-11-23 20:40:34,036 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:34,036 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2019-11-23 20:40:34,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:34,037 INFO L225 Difference]: With dead ends: 120 [2019-11-23 20:40:34,037 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:40:34,038 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:40:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:40:34,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 69. [2019-11-23 20:40:34,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 20:40:34,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 88 transitions. [2019-11-23 20:40:34,048 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 88 transitions. Word has length 41 [2019-11-23 20:40:34,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:34,049 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 88 transitions. [2019-11-23 20:40:34,049 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:40:34,049 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 88 transitions. [2019-11-23 20:40:34,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:40:34,050 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:34,050 INFO L410 BasicCegarLoop]: trace histogram [7, 2, 2, 2, 2, 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] [2019-11-23 20:40:34,253 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:34,253 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:34,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:34,254 INFO L82 PathProgramCache]: Analyzing trace with hash 421513289, now seen corresponding path program 1 times [2019-11-23 20:40:34,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:34,254 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139828687] [2019-11-23 20:40:34,254 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:34,258 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:34,258 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35034] [2019-11-23 20:40:34,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:34,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:34,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:40:34,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:34,418 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:40:34,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139828687] [2019-11-23 20:40:34,418 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:34,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35034] [2019-11-23 20:40:34,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:34,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 20:40:34,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602772765] [2019-11-23 20:40:34,419 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:40:34,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:34,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:40:34,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:40:34,420 INFO L87 Difference]: Start difference. First operand 69 states and 88 transitions. Second operand 11 states. [2019-11-23 20:40:34,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:34,638 INFO L93 Difference]: Finished difference Result 270 states and 353 transitions. [2019-11-23 20:40:34,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:40:34,638 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2019-11-23 20:40:34,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:34,640 INFO L225 Difference]: With dead ends: 270 [2019-11-23 20:40:34,640 INFO L226 Difference]: Without dead ends: 204 [2019-11-23 20:40:34,641 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:40:34,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2019-11-23 20:40:34,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 73. [2019-11-23 20:40:34,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 20:40:34,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 93 transitions. [2019-11-23 20:40:34,656 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 93 transitions. Word has length 43 [2019-11-23 20:40:34,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:34,657 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 93 transitions. [2019-11-23 20:40:34,657 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:40:34,657 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 93 transitions. [2019-11-23 20:40:34,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 20:40:34,658 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:34,658 INFO L410 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 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] [2019-11-23 20:40:34,861 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:34,862 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:34,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:34,862 INFO L82 PathProgramCache]: Analyzing trace with hash -7022620, now seen corresponding path program 2 times [2019-11-23 20:40:34,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:34,862 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591847513] [2019-11-23 20:40:34,863 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:34,867 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:34,868 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100085525] [2019-11-23 20:40:34,868 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:34,939 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:40:34,939 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:34,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:40:34,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:40:35,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591847513] [2019-11-23 20:40:35,037 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:35,037 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100085525] [2019-11-23 20:40:35,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:35,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 20:40:35,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651184393] [2019-11-23 20:40:35,038 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:40:35,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:35,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:40:35,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:40:35,040 INFO L87 Difference]: Start difference. First operand 73 states and 93 transitions. Second operand 12 states. [2019-11-23 20:40:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:35,298 INFO L93 Difference]: Finished difference Result 296 states and 387 transitions. [2019-11-23 20:40:35,298 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:40:35,298 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 44 [2019-11-23 20:40:35,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:35,300 INFO L225 Difference]: With dead ends: 296 [2019-11-23 20:40:35,300 INFO L226 Difference]: Without dead ends: 226 [2019-11-23 20:40:35,301 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:40:35,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2019-11-23 20:40:35,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 77. [2019-11-23 20:40:35,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 20:40:35,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 98 transitions. [2019-11-23 20:40:35,318 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 98 transitions. Word has length 44 [2019-11-23 20:40:35,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:35,318 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 98 transitions. [2019-11-23 20:40:35,318 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:40:35,318 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 98 transitions. [2019-11-23 20:40:35,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:40:35,319 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:35,319 INFO L410 BasicCegarLoop]: trace histogram [9, 2, 2, 2, 2, 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] [2019-11-23 20:40:35,523 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:35,523 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:35,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:35,523 INFO L82 PathProgramCache]: Analyzing trace with hash -406733911, now seen corresponding path program 3 times [2019-11-23 20:40:35,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:35,524 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472510334] [2019-11-23 20:40:35,524 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:35,527 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:35,527 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67981704] [2019-11-23 20:40:35,528 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:35,564 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:40:35,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:35,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:40:35,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-23 20:40:35,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472510334] [2019-11-23 20:40:35,589 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:35,589 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67981704] [2019-11-23 20:40:35,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:35,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 20:40:35,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571634078] [2019-11-23 20:40:35,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:35,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:35,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:35,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:35,591 INFO L87 Difference]: Start difference. First operand 77 states and 98 transitions. Second operand 4 states. [2019-11-23 20:40:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:35,678 INFO L93 Difference]: Finished difference Result 165 states and 209 transitions. [2019-11-23 20:40:35,678 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:35,678 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2019-11-23 20:40:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:35,679 INFO L225 Difference]: With dead ends: 165 [2019-11-23 20:40:35,679 INFO L226 Difference]: Without dead ends: 106 [2019-11-23 20:40:35,680 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:35,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-23 20:40:35,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 92. [2019-11-23 20:40:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-11-23 20:40:35,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 115 transitions. [2019-11-23 20:40:35,693 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 115 transitions. Word has length 45 [2019-11-23 20:40:35,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:35,693 INFO L462 AbstractCegarLoop]: Abstraction has 92 states and 115 transitions. [2019-11-23 20:40:35,693 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:35,693 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 115 transitions. [2019-11-23 20:40:35,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 20:40:35,694 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:35,694 INFO L410 BasicCegarLoop]: trace histogram [18, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:35,897 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:35,897 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:35,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:35,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1465806498, now seen corresponding path program 4 times [2019-11-23 20:40:35,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:35,898 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639873232] [2019-11-23 20:40:35,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:35,902 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:35,902 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [692897344] [2019-11-23 20:40:35,903 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:35,940 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:40:35,940 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:35,941 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:40:35,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 219 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2019-11-23 20:40:35,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639873232] [2019-11-23 20:40:35,994 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:35,994 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692897344] [2019-11-23 20:40:35,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:35,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:40:35,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8904495] [2019-11-23 20:40:35,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:40:35,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:35,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:40:35,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:40:35,996 INFO L87 Difference]: Start difference. First operand 92 states and 115 transitions. Second operand 7 states. [2019-11-23 20:40:36,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:36,174 INFO L93 Difference]: Finished difference Result 162 states and 206 transitions. [2019-11-23 20:40:36,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:40:36,174 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2019-11-23 20:40:36,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:36,175 INFO L225 Difference]: With dead ends: 162 [2019-11-23 20:40:36,176 INFO L226 Difference]: Without dead ends: 106 [2019-11-23 20:40:36,176 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:40:36,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-11-23 20:40:36,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 100. [2019-11-23 20:40:36,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 20:40:36,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 126 transitions. [2019-11-23 20:40:36,191 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 126 transitions. Word has length 60 [2019-11-23 20:40:36,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:36,191 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 126 transitions. [2019-11-23 20:40:36,191 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:40:36,191 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 126 transitions. [2019-11-23 20:40:36,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:40:36,192 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:36,192 INFO L410 BasicCegarLoop]: trace histogram [18, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:36,395 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:36,395 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:36,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:36,396 INFO L82 PathProgramCache]: Analyzing trace with hash -513922418, now seen corresponding path program 5 times [2019-11-23 20:40:36,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:36,396 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904013595] [2019-11-23 20:40:36,396 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:36,405 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:36,405 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1941137635] [2019-11-23 20:40:36,406 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true