/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-2-n-u.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:40:21,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:40:21,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:40:21,070 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:40:21,070 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:40:21,071 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:40:21,073 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:40:21,074 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:40:21,076 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:40:21,077 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:40:21,078 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:40:21,079 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:40:21,079 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:40:21,080 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:40:21,081 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:40:21,082 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:40:21,083 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:40:21,084 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:40:21,086 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:40:21,088 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:40:21,089 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:40:21,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:40:21,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:40:21,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:40:21,095 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:40:21,102 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:40:21,103 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:40:21,104 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:40:21,104 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 20:40:21,122 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:40:21,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:40:21,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:40:21,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:40:21,124 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:40:21,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:40:21,125 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:40:21,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:40:21,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:40:21,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:40:21,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:40:21,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:40:21,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:40:21,127 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:40:21,127 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:40:21,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:40:21,128 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:40:21,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:40:21,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:40:21,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:40:21,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:40:21,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:40:21,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:40:21,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:40:21,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:40:21,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:40:21,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:40:21,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:40:21,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:40:21,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:40:21,394 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:40:21,411 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:40:21,415 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:40:21,417 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:40:21,417 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:40:21,418 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-multidimensional/copy-partial-2-n-u.c [2019-11-23 20:40:21,480 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb7bc47fa/26c58c74879241ce960caadd12240a80/FLAGab0f674a5 [2019-11-23 20:40:21,912 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:40:21,913 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-multidimensional/copy-partial-2-n-u.c [2019-11-23 20:40:21,919 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb7bc47fa/26c58c74879241ce960caadd12240a80/FLAGab0f674a5 [2019-11-23 20:40:22,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eb7bc47fa/26c58c74879241ce960caadd12240a80 [2019-11-23 20:40:22,355 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:40:22,356 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:40:22,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:40:22,358 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:40:22,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:40:22,362 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,365 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f8565c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22, skipping insertion in model container [2019-11-23 20:40:22,365 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:40:22,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:40:22,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:40:22,591 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:40:22,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:40:22,630 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:40:22,630 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22 WrapperNode [2019-11-23 20:40:22,630 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:40:22,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:40:22,631 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:40:22,631 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:40:22,639 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,724 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,743 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:40:22,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:40:22,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:40:22,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:40:22,752 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,752 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,765 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (1/1) ... [2019-11-23 20:40:22,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:40:22,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:40:22,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:40:22,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:40:22,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (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 20:40:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:40:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:40:22,827 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:40:22,827 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:40:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:40:22,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:40:23,092 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:40:23,092 INFO L284 CfgBuilder]: Removed 12 assume(true) statements. [2019-11-23 20:40:23,094 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:40:23 BoogieIcfgContainer [2019-11-23 20:40:23,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:40:23,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:40:23,095 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:40:23,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:40:23,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:40:22" (1/3) ... [2019-11-23 20:40:23,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5152b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:40:23, skipping insertion in model container [2019-11-23 20:40:23,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:40:22" (2/3) ... [2019-11-23 20:40:23,106 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5152b47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:40:23, skipping insertion in model container [2019-11-23 20:40:23,106 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:40:23" (3/3) ... [2019-11-23 20:40:23,110 INFO L109 eAbstractionObserver]: Analyzing ICFG copy-partial-2-n-u.c [2019-11-23 20:40:23,122 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:40:23,142 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:40:23,156 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:40:23,175 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:40:23,176 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:40:23,176 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:40:23,176 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:40:23,176 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:40:23,176 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:40:23,176 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:40:23,177 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:40:23,188 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-11-23 20:40:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:40:23,194 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:23,194 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:23,195 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:23,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:23,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1817636276, now seen corresponding path program 1 times [2019-11-23 20:40:23,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:23,209 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774651288] [2019-11-23 20:40:23,209 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:23,276 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:23,276 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503031192] [2019-11-23 20:40:23,277 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 20:40:23,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:23,362 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:23,367 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:23,416 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 20:40:23,417 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774651288] [2019-11-23 20:40:23,417 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:23,418 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503031192] [2019-11-23 20:40:23,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:23,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:40:23,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42768381] [2019-11-23 20:40:23,423 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:40:23,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:23,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:40:23,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:40:23,436 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2019-11-23 20:40:23,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:23,504 INFO L93 Difference]: Finished difference Result 43 states and 71 transitions. [2019-11-23 20:40:23,505 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:40:23,506 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:40:23,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:23,516 INFO L225 Difference]: With dead ends: 43 [2019-11-23 20:40:23,516 INFO L226 Difference]: Without dead ends: 20 [2019-11-23 20:40:23,519 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 8 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 20:40:23,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-23 20:40:23,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2019-11-23 20:40:23,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-23 20:40:23,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2019-11-23 20:40:23,550 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 10 [2019-11-23 20:40:23,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:23,550 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2019-11-23 20:40:23,550 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:40:23,551 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2019-11-23 20:40:23,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-23 20:40:23,551 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:23,552 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:23,755 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:23,756 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:23,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:23,757 INFO L82 PathProgramCache]: Analyzing trace with hash 429030367, now seen corresponding path program 1 times [2019-11-23 20:40:23,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:23,758 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363071599] [2019-11-23 20:40:23,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:23,766 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:23,766 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [164307163] [2019-11-23 20:40:23,767 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 20:40:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:23,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:23,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:23,835 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 20:40:23,835 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363071599] [2019-11-23 20:40:23,835 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:23,837 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164307163] [2019-11-23 20:40:23,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:23,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:40:23,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157041289] [2019-11-23 20:40:23,840 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:23,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:23,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:23,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:23,842 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand 4 states. [2019-11-23 20:40:23,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:23,902 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2019-11-23 20:40:23,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:23,903 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-23 20:40:23,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:23,904 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:40:23,904 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:40:23,905 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 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 20:40:23,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:40:23,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 19. [2019-11-23 20:40:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 20:40:23,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2019-11-23 20:40:23,912 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 13 [2019-11-23 20:40:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:23,912 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2019-11-23 20:40:23,912 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:23,912 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2019-11-23 20:40:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 20:40:23,913 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:23,913 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:24,116 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:24,117 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:24,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:24,117 INFO L82 PathProgramCache]: Analyzing trace with hash -270581085, now seen corresponding path program 1 times [2019-11-23 20:40:24,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:24,119 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857329874] [2019-11-23 20:40:24,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:24,124 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:24,124 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1257385892] [2019-11-23 20:40:24,124 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 20:40:24,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:24,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:40:24,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:40:24,204 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857329874] [2019-11-23 20:40:24,204 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:24,208 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257385892] [2019-11-23 20:40:24,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:24,208 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:40:24,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750653655] [2019-11-23 20:40:24,209 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:40:24,209 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:24,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:40:24,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:24,210 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand 5 states. [2019-11-23 20:40:24,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:24,315 INFO L93 Difference]: Finished difference Result 58 states and 75 transitions. [2019-11-23 20:40:24,317 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:40:24,317 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2019-11-23 20:40:24,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:24,319 INFO L225 Difference]: With dead ends: 58 [2019-11-23 20:40:24,320 INFO L226 Difference]: Without dead ends: 42 [2019-11-23 20:40:24,320 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 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 20:40:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-23 20:40:24,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 20. [2019-11-23 20:40:24,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:40:24,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2019-11-23 20:40:24,337 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 14 [2019-11-23 20:40:24,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:24,338 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2019-11-23 20:40:24,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:40:24,338 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2019-11-23 20:40:24,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:40:24,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:24,339 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:24,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:24,551 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:24,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:24,552 INFO L82 PathProgramCache]: Analyzing trace with hash -483699617, now seen corresponding path program 2 times [2019-11-23 20:40:24,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:24,553 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082499414] [2019-11-23 20:40:24,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:24,558 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:24,559 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1165574613] [2019-11-23 20:40:24,559 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:24,615 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2019-11-23 20:40:24,615 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:24,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:40:24,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:40:24,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082499414] [2019-11-23 20:40:24,640 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:24,641 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165574613] [2019-11-23 20:40:24,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:24,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:40:24,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438863296] [2019-11-23 20:40:24,642 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:24,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:24,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:24,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:24,643 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2019-11-23 20:40:24,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:24,693 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2019-11-23 20:40:24,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:24,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 20:40:24,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:24,695 INFO L225 Difference]: With dead ends: 42 [2019-11-23 20:40:24,695 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:40:24,695 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 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 20:40:24,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:40:24,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 21. [2019-11-23 20:40:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:40:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2019-11-23 20:40:24,702 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 15 [2019-11-23 20:40:24,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:24,702 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2019-11-23 20:40:24,702 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:24,703 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2019-11-23 20:40:24,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 20:40:24,703 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:24,703 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:24,904 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:24,904 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:24,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:24,905 INFO L82 PathProgramCache]: Analyzing trace with hash 420148264, now seen corresponding path program 1 times [2019-11-23 20:40:24,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:24,906 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624576983] [2019-11-23 20:40:24,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:24,912 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:24,912 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1482684086] [2019-11-23 20:40:24,912 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 20:40:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:24,946 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:40:24,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:24,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:40:24,997 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624576983] [2019-11-23 20:40:24,997 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:24,999 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482684086] [2019-11-23 20:40:24,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:25,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:40:25,000 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929637357] [2019-11-23 20:40:25,000 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:40:25,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:25,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:40:25,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:40:25,001 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 6 states. [2019-11-23 20:40:25,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:25,117 INFO L93 Difference]: Finished difference Result 73 states and 93 transitions. [2019-11-23 20:40:25,117 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:40:25,117 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2019-11-23 20:40:25,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:25,119 INFO L225 Difference]: With dead ends: 73 [2019-11-23 20:40:25,119 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 20:40:25,120 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 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 20:40:25,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 20:40:25,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 22. [2019-11-23 20:40:25,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-23 20:40:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2019-11-23 20:40:25,136 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 18 [2019-11-23 20:40:25,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:25,137 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2019-11-23 20:40:25,137 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:40:25,137 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2019-11-23 20:40:25,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:40:25,138 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:25,138 INFO L410 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:25,350 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:25,351 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:25,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:25,351 INFO L82 PathProgramCache]: Analyzing trace with hash -2143303708, now seen corresponding path program 2 times [2019-11-23 20:40:25,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:25,352 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342332173] [2019-11-23 20:40:25,353 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:25,358 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:25,358 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785167650] [2019-11-23 20:40:25,359 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 20:40:25,400 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:40:25,401 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:25,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:40:25,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:25,450 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:40:25,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342332173] [2019-11-23 20:40:25,451 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:25,451 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785167650] [2019-11-23 20:40:25,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:25,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 20:40:25,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237261787] [2019-11-23 20:40:25,452 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:40:25,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:25,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:40:25,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:40:25,453 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 7 states. [2019-11-23 20:40:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:25,578 INFO L93 Difference]: Finished difference Result 86 states and 109 transitions. [2019-11-23 20:40:25,578 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:40:25,578 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2019-11-23 20:40:25,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:25,579 INFO L225 Difference]: With dead ends: 86 [2019-11-23 20:40:25,579 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:40:25,580 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 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 20:40:25,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:40:25,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 23. [2019-11-23 20:40:25,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 20:40:25,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2019-11-23 20:40:25,587 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 19 [2019-11-23 20:40:25,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:25,587 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2019-11-23 20:40:25,587 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:40:25,587 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2019-11-23 20:40:25,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:40:25,588 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:25,588 INFO L410 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:25,796 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:25,797 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:25,798 INFO L82 PathProgramCache]: Analyzing trace with hash -5936216, now seen corresponding path program 3 times [2019-11-23 20:40:25,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:25,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179173067] [2019-11-23 20:40:25,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:25,804 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:25,804 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1867950382] [2019-11-23 20:40:25,804 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:25,835 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:40:25,835 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:25,836 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:40:25,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:40:25,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179173067] [2019-11-23 20:40:25,854 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:25,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867950382] [2019-11-23 20:40:25,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:25,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2019-11-23 20:40:25,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975548257] [2019-11-23 20:40:25,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:40:25,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:25,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:40:25,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:40:25,856 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand 4 states. [2019-11-23 20:40:25,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:25,908 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2019-11-23 20:40:25,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:40:25,909 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2019-11-23 20:40:25,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:25,910 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:40:25,910 INFO L226 Difference]: Without dead ends: 36 [2019-11-23 20:40:25,910 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 17 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 20:40:25,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-23 20:40:25,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2019-11-23 20:40:25,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-11-23 20:40:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2019-11-23 20:40:25,917 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 20 [2019-11-23 20:40:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:25,918 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2019-11-23 20:40:25,918 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:40:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2019-11-23 20:40:25,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:40:25,919 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:25,919 INFO L410 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:26,122 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:26,123 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:26,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:26,124 INFO L82 PathProgramCache]: Analyzing trace with hash -2045914861, now seen corresponding path program 4 times [2019-11-23 20:40:26,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:26,124 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704333554] [2019-11-23 20:40:26,125 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:26,129 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:26,129 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511386685] [2019-11-23 20:40:26,129 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:26,159 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:40:26,160 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:26,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:40:26,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:26,214 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2019-11-23 20:40:26,214 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704333554] [2019-11-23 20:40:26,214 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:26,215 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511386685] [2019-11-23 20:40:26,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:40:26,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 20:40:26,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870662885] [2019-11-23 20:40:26,217 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:40:26,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:26,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:40:26,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:26,218 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 5 states. [2019-11-23 20:40:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:26,285 INFO L93 Difference]: Finished difference Result 60 states and 75 transitions. [2019-11-23 20:40:26,285 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:40:26,285 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2019-11-23 20:40:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:26,286 INFO L225 Difference]: With dead ends: 60 [2019-11-23 20:40:26,286 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:40:26,289 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:40:26,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:40:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 32. [2019-11-23 20:40:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-23 20:40:26,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2019-11-23 20:40:26,301 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 27 [2019-11-23 20:40:26,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:26,302 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2019-11-23 20:40:26,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:40:26,302 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2019-11-23 20:40:26,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:40:26,306 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:26,306 INFO L410 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:26,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:26,507 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:26,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:26,508 INFO L82 PathProgramCache]: Analyzing trace with hash -310603517, now seen corresponding path program 1 times [2019-11-23 20:40:26,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:26,509 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748873143] [2019-11-23 20:40:26,509 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:26,516 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:26,516 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2044162164] [2019-11-23 20:40:26,516 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 20:40:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:40:26,567 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:40:26,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:26,646 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-23 20:40:26,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748873143] [2019-11-23 20:40:26,646 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:26,647 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044162164] [2019-11-23 20:40:26,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:26,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-11-23 20:40:26,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615474504] [2019-11-23 20:40:26,648 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-23 20:40:26,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:26,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-23 20:40:26,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:40:26,648 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand 8 states. [2019-11-23 20:40:26,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:26,749 INFO L93 Difference]: Finished difference Result 107 states and 132 transitions. [2019-11-23 20:40:26,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-23 20:40:26,750 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-11-23 20:40:26,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:26,751 INFO L225 Difference]: With dead ends: 107 [2019-11-23 20:40:26,751 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 20:40:26,751 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 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 20:40:26,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 20:40:26,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 34. [2019-11-23 20:40:26,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:40:26,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2019-11-23 20:40:26,759 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 28 [2019-11-23 20:40:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:26,760 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2019-11-23 20:40:26,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-23 20:40:26,760 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2019-11-23 20:40:26,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:40:26,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:26,761 INFO L410 BasicCegarLoop]: trace histogram [10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:26,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:26,965 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:26,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:26,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1398243649, now seen corresponding path program 2 times [2019-11-23 20:40:26,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:26,966 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709564861] [2019-11-23 20:40:26,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:26,971 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:26,971 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1573865949] [2019-11-23 20:40:26,971 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 20:40:27,015 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:40:27,015 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:27,016 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:40:27,017 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 38 proven. 15 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-11-23 20:40:27,104 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709564861] [2019-11-23 20:40:27,104 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:27,105 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573865949] [2019-11-23 20:40:27,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:27,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 20:40:27,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643050779] [2019-11-23 20:40:27,106 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 20:40:27,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:27,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 20:40:27,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2019-11-23 20:40:27,106 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 9 states. [2019-11-23 20:40:27,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:27,220 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2019-11-23 20:40:27,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:40:27,220 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 30 [2019-11-23 20:40:27,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:27,221 INFO L225 Difference]: With dead ends: 121 [2019-11-23 20:40:27,221 INFO L226 Difference]: Without dead ends: 96 [2019-11-23 20:40:27,222 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 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 20:40:27,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2019-11-23 20:40:27,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 36. [2019-11-23 20:40:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:40:27,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2019-11-23 20:40:27,230 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 30 [2019-11-23 20:40:27,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:27,230 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2019-11-23 20:40:27,230 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 20:40:27,231 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2019-11-23 20:40:27,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 20:40:27,231 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:27,232 INFO L410 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:27,435 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:27,436 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:27,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:27,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1613100995, now seen corresponding path program 3 times [2019-11-23 20:40:27,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:27,437 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618463160] [2019-11-23 20:40:27,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:27,441 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:27,442 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [763801144] [2019-11-23 20:40:27,442 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 20:40:27,471 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-11-23 20:40:27,471 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:27,472 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:40:27,473 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:27,526 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2019-11-23 20:40:27,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618463160] [2019-11-23 20:40:27,526 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:27,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763801144] [2019-11-23 20:40:27,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:27,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:40:27,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628806902] [2019-11-23 20:40:27,527 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:40:27,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:27,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:40:27,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:27,528 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 5 states. [2019-11-23 20:40:27,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:27,580 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2019-11-23 20:40:27,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:40:27,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2019-11-23 20:40:27,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:27,581 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:40:27,581 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:40:27,582 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 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 20:40:27,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:40:27,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 40. [2019-11-23 20:40:27,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-11-23 20:40:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2019-11-23 20:40:27,590 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 32 [2019-11-23 20:40:27,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:27,590 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2019-11-23 20:40:27,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:40:27,590 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2019-11-23 20:40:27,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 20:40:27,591 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:27,591 INFO L410 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:27,795 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:27,795 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:27,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:27,796 INFO L82 PathProgramCache]: Analyzing trace with hash 680927730, now seen corresponding path program 4 times [2019-11-23 20:40:27,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:27,796 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842211294] [2019-11-23 20:40:27,796 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:27,800 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:27,800 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1797395818] [2019-11-23 20:40:27,800 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 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 20:40:27,854 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:40:27,854 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:27,855 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:40:27,860 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:27,924 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2019-11-23 20:40:27,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842211294] [2019-11-23 20:40:27,924 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:27,924 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797395818] [2019-11-23 20:40:27,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:27,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:40:27,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919140891] [2019-11-23 20:40:27,927 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:40:27,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:27,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:40:27,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:40:27,927 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand 5 states. [2019-11-23 20:40:27,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:27,985 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2019-11-23 20:40:27,985 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:40:27,986 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2019-11-23 20:40:27,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:27,986 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:40:27,986 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 20:40:27,987 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 32 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 20:40:27,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 20:40:27,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2019-11-23 20:40:27,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 20:40:27,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2019-11-23 20:40:27,995 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 36 [2019-11-23 20:40:27,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:27,996 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2019-11-23 20:40:27,996 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:40:27,996 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2019-11-23 20:40:27,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:40:27,997 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:27,997 INFO L410 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:28,200 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:28,200 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:28,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:28,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1736919517, now seen corresponding path program 5 times [2019-11-23 20:40:28,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:28,201 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988911824] [2019-11-23 20:40:28,201 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:28,205 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:28,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [278083687] [2019-11-23 20:40:28,206 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 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 20:40:43,382 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-11-23 20:40:43,382 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:43,385 INFO L255 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:40:43,386 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:43,465 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 153 proven. 21 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-23 20:40:43,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988911824] [2019-11-23 20:40:43,465 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:43,465 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278083687] [2019-11-23 20:40:43,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:43,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-11-23 20:40:43,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5116720] [2019-11-23 20:40:43,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:40:43,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:43,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:40:43,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:40:43,467 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 10 states. [2019-11-23 20:40:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:40:43,616 INFO L93 Difference]: Finished difference Result 180 states and 222 transitions. [2019-11-23 20:40:43,616 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:40:43,617 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2019-11-23 20:40:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:40:43,618 INFO L225 Difference]: With dead ends: 180 [2019-11-23 20:40:43,618 INFO L226 Difference]: Without dead ends: 141 [2019-11-23 20:40:43,618 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 36 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 20:40:43,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-11-23 20:40:43,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 52. [2019-11-23 20:40:43,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-11-23 20:40:43,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2019-11-23 20:40:43,630 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 45 [2019-11-23 20:40:43,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:40:43,630 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2019-11-23 20:40:43,630 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:40:43,630 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2019-11-23 20:40:43,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 20:40:43,631 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:40:43,631 INFO L410 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:40:43,845 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:40:43,845 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:40:43,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:40:43,846 INFO L82 PathProgramCache]: Analyzing trace with hash 1444182687, now seen corresponding path program 6 times [2019-11-23 20:40:43,846 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:40:43,846 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748080912] [2019-11-23 20:40:43,846 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:40:43,850 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:40:43,851 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2068241909] [2019-11-23 20:40:43,851 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 20:40:43,891 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2019-11-23 20:40:43,891 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:40:43,892 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 20:40:43,895 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:40:43,943 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2019-11-23 20:40:43,944 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:40:43,958 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:40:43,958 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:40:43,959 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:23 [2019-11-23 20:40:44,037 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2019-11-23 20:40:44,038 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:40:44,053 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:40:44,054 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:40:44,054 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:34 [2019-11-23 20:40:44,126 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:40:44,127 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 101 [2019-11-23 20:40:44,129 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:40:44,200 INFO L567 ElimStorePlain]: treesize reduction 81, result has 45.6 percent of original size [2019-11-23 20:40:44,201 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:40:44,202 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:72, output treesize:68 [2019-11-23 20:40:51,991 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:40:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2019-11-23 20:40:52,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748080912] [2019-11-23 20:40:52,061 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:40:52,061 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068241909] [2019-11-23 20:40:52,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:40:52,062 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 20:40:52,062 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472126947] [2019-11-23 20:40:52,062 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:40:52,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:40:52,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:40:52,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=122, Unknown=2, NotChecked=0, Total=156 [2019-11-23 20:40:52,066 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 13 states. [2019-11-23 20:40:53,021 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2019-11-23 20:41:05,562 WARN L192 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 56 [2019-11-23 20:41:11,653 WARN L192 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 58 [2019-11-23 20:41:44,710 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2019-11-23 20:41:56,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:56,147 INFO L93 Difference]: Finished difference Result 78 states and 89 transitions. [2019-11-23 20:41:56,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:41:56,147 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2019-11-23 20:41:56,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:56,148 INFO L225 Difference]: With dead ends: 78 [2019-11-23 20:41:56,148 INFO L226 Difference]: Without dead ends: 76 [2019-11-23 20:41:56,149 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 43.9s TimeCoverageRelationStatistics Valid=163, Invalid=422, Unknown=15, NotChecked=0, Total=600 [2019-11-23 20:41:56,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-23 20:41:56,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2019-11-23 20:41:56,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 20:41:56,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2019-11-23 20:41:56,160 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 48 [2019-11-23 20:41:56,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:56,160 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2019-11-23 20:41:56,160 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:41:56,161 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2019-11-23 20:41:56,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-23 20:41:56,161 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:56,161 INFO L410 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:56,364 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:56,365 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:56,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:56,365 INFO L82 PathProgramCache]: Analyzing trace with hash 963892330, now seen corresponding path program 1 times [2019-11-23 20:41:56,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:56,366 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782525457] [2019-11-23 20:41:56,366 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:56,370 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:56,371 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1489104891] [2019-11-23 20:41:56,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:41:56,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:41:56,421 INFO L255 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:41:56,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:56,526 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 131 proven. 28 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2019-11-23 20:41:56,526 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782525457] [2019-11-23 20:41:56,527 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:56,527 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489104891] [2019-11-23 20:41:56,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:56,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 20:41:56,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627508420] [2019-11-23 20:41:56,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:41:56,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:56,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:41:56,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:41:56,529 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 11 states. [2019-11-23 20:41:56,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:56,718 INFO L93 Difference]: Finished difference Result 204 states and 250 transitions. [2019-11-23 20:41:56,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:41:56,718 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2019-11-23 20:41:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:56,720 INFO L225 Difference]: With dead ends: 204 [2019-11-23 20:41:56,720 INFO L226 Difference]: Without dead ends: 160 [2019-11-23 20:41:56,720 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:41:56,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-23 20:41:56,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 58. [2019-11-23 20:41:56,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2019-11-23 20:41:56,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2019-11-23 20:41:56,740 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 51 [2019-11-23 20:41:56,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:56,740 INFO L462 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2019-11-23 20:41:56,741 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:41:56,741 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2019-11-23 20:41:56,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 20:41:56,742 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:56,742 INFO L410 BasicCegarLoop]: trace histogram [24, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:56,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:56,946 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:56,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:56,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1883882836, now seen corresponding path program 2 times [2019-11-23 20:41:56,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:56,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617419093] [2019-11-23 20:41:56,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:56,952 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:56,953 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933590792] [2019-11-23 20:41:56,953 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 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 20:41:57,022 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:41:57,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:57,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:41:57,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:57,130 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 165 proven. 36 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2019-11-23 20:41:57,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617419093] [2019-11-23 20:41:57,131 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:57,131 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933590792] [2019-11-23 20:41:57,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:57,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-11-23 20:41:57,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093076969] [2019-11-23 20:41:57,132 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:41:57,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:57,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:41:57,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:41:57,133 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 12 states. [2019-11-23 20:41:57,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:57,343 INFO L93 Difference]: Finished difference Result 223 states and 273 transitions. [2019-11-23 20:41:57,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-23 20:41:57,344 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 54 [2019-11-23 20:41:57,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:57,345 INFO L225 Difference]: With dead ends: 223 [2019-11-23 20:41:57,345 INFO L226 Difference]: Without dead ends: 177 [2019-11-23 20:41:57,346 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 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 20:41:57,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2019-11-23 20:41:57,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 61. [2019-11-23 20:41:57,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 20:41:57,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2019-11-23 20:41:57,357 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 54 [2019-11-23 20:41:57,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:57,357 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2019-11-23 20:41:57,358 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:41:57,358 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2019-11-23 20:41:57,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:41:57,358 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:57,359 INFO L410 BasicCegarLoop]: trace histogram [27, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:57,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:57,561 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:57,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:57,562 INFO L82 PathProgramCache]: Analyzing trace with hash -492583638, now seen corresponding path program 3 times [2019-11-23 20:41:57,562 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:57,562 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809230757] [2019-11-23 20:41:57,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:57,567 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:57,567 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733549586] [2019-11-23 20:41:57,567 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 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 20:41:57,607 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 20:41:57,608 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:57,608 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:41:57,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:57,633 INFO L134 CoverageAnalysis]: Checked inductivity of 456 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2019-11-23 20:41:57,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809230757] [2019-11-23 20:41:57,634 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:57,634 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733549586] [2019-11-23 20:41:57,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:57,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2019-11-23 20:41:57,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762427510] [2019-11-23 20:41:57,635 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:41:57,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:57,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:41:57,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:41:57,636 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 5 states. [2019-11-23 20:41:57,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:57,694 INFO L93 Difference]: Finished difference Result 90 states and 104 transitions. [2019-11-23 20:41:57,694 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:41:57,694 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2019-11-23 20:41:57,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:57,695 INFO L225 Difference]: With dead ends: 90 [2019-11-23 20:41:57,695 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:41:57,695 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 53 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 20:41:57,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:41:57,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2019-11-23 20:41:57,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:41:57,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 75 transitions. [2019-11-23 20:41:57,707 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 75 transitions. Word has length 57 [2019-11-23 20:41:57,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:57,707 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 75 transitions. [2019-11-23 20:41:57,707 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:41:57,708 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 75 transitions. [2019-11-23 20:41:57,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:41:57,708 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:57,708 INFO L410 BasicCegarLoop]: trace histogram [27, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:57,920 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:57,920 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:57,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:57,920 INFO L82 PathProgramCache]: Analyzing trace with hash -834682456, now seen corresponding path program 4 times [2019-11-23 20:41:57,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:57,921 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518780727] [2019-11-23 20:41:57,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:57,925 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:57,926 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509327199] [2019-11-23 20:41:57,926 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 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 20:41:57,991 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:41:57,992 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:41:57,993 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:41:57,994 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:41:58,054 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 309 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2019-11-23 20:41:58,054 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518780727] [2019-11-23 20:41:58,054 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 20:41:58,055 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509327199] [2019-11-23 20:41:58,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 20:41:58,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-11-23 20:41:58,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261758732] [2019-11-23 20:41:58,058 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:41:58,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:41:58,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:41:58,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:41:58,058 INFO L87 Difference]: Start difference. First operand 66 states and 75 transitions. Second operand 6 states. [2019-11-23 20:41:58,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:41:58,129 INFO L93 Difference]: Finished difference Result 116 states and 133 transitions. [2019-11-23 20:41:58,129 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:41:58,129 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2019-11-23 20:41:58,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:41:58,130 INFO L225 Difference]: With dead ends: 116 [2019-11-23 20:41:58,130 INFO L226 Difference]: Without dead ends: 89 [2019-11-23 20:41:58,131 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 54 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 20:41:58,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-23 20:41:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2019-11-23 20:41:58,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2019-11-23 20:41:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2019-11-23 20:41:58,143 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 59 [2019-11-23 20:41:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:41:58,143 INFO L462 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2019-11-23 20:41:58,143 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:41:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2019-11-23 20:41:58,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-23 20:41:58,144 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:41:58,144 INFO L410 BasicCegarLoop]: trace histogram [36, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:41:58,348 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:41:58,348 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:41:58,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:41:58,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1418058087, now seen corresponding path program 5 times [2019-11-23 20:41:58,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:41:58,350 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443652236] [2019-11-23 20:41:58,350 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:41:58,355 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 20:41:58,355 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581176009] [2019-11-23 20:41:58,355 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 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