java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:15:51,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:15:51,094 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:15:51,105 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:15:51,105 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:15:51,107 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:15:51,108 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:15:51,110 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:15:51,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:15:51,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:15:51,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:15:51,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:15:51,115 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:15:51,116 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:15:51,117 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:15:51,118 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:15:51,119 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:15:51,120 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:15:51,122 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:15:51,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:15:51,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:15:51,127 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:15:51,128 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:15:51,129 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:15:51,132 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:15:51,135 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:15:51,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:15:51,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:15:51,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:15:51,139 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:15:51,139 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:15:51,140 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:15:51,140 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:15:51,140 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:15:51,141 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:15:51,142 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:15:51,143 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-14 23:15:51,160 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:15:51,161 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:15:51,164 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:15:51,164 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:15:51,164 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:15:51,165 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:15:51,165 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:15:51,165 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:15:51,165 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:15:51,165 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:15:51,166 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:15:51,166 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:15:51,166 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:15:51,166 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:15:51,166 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:15:51,167 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:15:51,167 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:15:51,167 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:15:51,167 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:15:51,167 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:15:51,168 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:15:51,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:15:51,168 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:15:51,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:15:51,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:15:51,169 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:15:51,169 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:15:51,169 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:15:51,169 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:15:51,435 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:15:51,449 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:15:51,452 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:15:51,454 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:15:51,454 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:15:51,455 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2019-10-14 23:15:51,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dda51821e/d69b64e504fb4c6db99cd81ce5a165b5/FLAGaf514e9b5 [2019-10-14 23:15:52,008 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:15:52,011 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+lhb-reducer.c [2019-10-14 23:15:52,023 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dda51821e/d69b64e504fb4c6db99cd81ce5a165b5/FLAGaf514e9b5 [2019-10-14 23:15:52,383 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dda51821e/d69b64e504fb4c6db99cd81ce5a165b5 [2019-10-14 23:15:52,394 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:15:52,396 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:15:52,397 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:52,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:15:52,401 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:15:52,402 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c3051b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52, skipping insertion in model container [2019-10-14 23:15:52,406 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,416 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:15:52,437 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:15:52,613 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:52,621 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:15:52,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:52,657 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:15:52,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52 WrapperNode [2019-10-14 23:15:52,658 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:52,659 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:15:52,659 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:15:52,659 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:15:52,673 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,770 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (1/1) ... [2019-10-14 23:15:52,772 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:15:52,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:15:52,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:15:52,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:15:52,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:15:52,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:15:52,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:15:52,825 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:15:52,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:15:52,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:15:52,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:15:52,826 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:15:52,826 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:15:52,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:15:52,826 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:15:53,050 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:15:53,050 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-14 23:15:53,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:53 BoogieIcfgContainer [2019-10-14 23:15:53,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:15:53,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:15:53,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:15:53,063 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:15:53,066 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:15:52" (1/3) ... [2019-10-14 23:15:53,067 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a516b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:53, skipping insertion in model container [2019-10-14 23:15:53,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:52" (2/3) ... [2019-10-14 23:15:53,068 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a516b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:53, skipping insertion in model container [2019-10-14 23:15:53,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:53" (3/3) ... [2019-10-14 23:15:53,074 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+lhb-reducer.c [2019-10-14 23:15:53,100 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:15:53,114 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:15:53,131 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:15:53,160 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:15:53,160 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:15:53,160 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:15:53,161 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:15:53,161 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:15:53,161 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:15:53,161 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:15:53,161 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:15:53,176 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2019-10-14 23:15:53,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-14 23:15:53,182 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:53,183 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:53,185 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:53,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:53,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1720236422, now seen corresponding path program 1 times [2019-10-14 23:15:53,197 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:53,197 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590565967] [2019-10-14 23:15:53,197 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:53,198 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:53,198 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:53,290 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:53,291 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380655931] [2019-10-14 23:15:53,291 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:53,343 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 23:15:53,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:53,514 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:53,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:53,556 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590565967] [2019-10-14 23:15:53,556 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:53,557 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380655931] [2019-10-14 23:15:53,559 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:53,560 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2019-10-14 23:15:53,560 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667470367] [2019-10-14 23:15:53,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-14 23:15:53,565 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:53,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-14 23:15:53,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-14 23:15:53,584 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 9 states. [2019-10-14 23:15:53,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:53,799 INFO L93 Difference]: Finished difference Result 41 states and 50 transitions. [2019-10-14 23:15:53,800 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-14 23:15:53,802 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-10-14 23:15:53,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:53,814 INFO L225 Difference]: With dead ends: 41 [2019-10-14 23:15:53,814 INFO L226 Difference]: Without dead ends: 18 [2019-10-14 23:15:53,819 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:15:53,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-14 23:15:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-14 23:15:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-14 23:15:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-10-14 23:15:53,860 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-10-14 23:15:53,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:53,861 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-10-14 23:15:53,861 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-14 23:15:53,861 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-10-14 23:15:53,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-14 23:15:53,862 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:53,862 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:54,066 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:54,067 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:54,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:54,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1787659072, now seen corresponding path program 1 times [2019-10-14 23:15:54,068 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:54,069 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127729591] [2019-10-14 23:15:54,069 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,069 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:54,105 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:54,106 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461733294] [2019-10-14 23:15:54,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:54,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:54,157 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-14 23:15:54,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:54,283 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:54,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:54,310 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127729591] [2019-10-14 23:15:54,311 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:54,311 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461733294] [2019-10-14 23:15:54,311 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:54,312 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-14 23:15:54,312 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9751868] [2019-10-14 23:15:54,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-14 23:15:54,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:54,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-14 23:15:54,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-14 23:15:54,315 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-10-14 23:15:54,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:54,435 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-10-14 23:15:54,435 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-14 23:15:54,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-10-14 23:15:54,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:54,437 INFO L225 Difference]: With dead ends: 22 [2019-10-14 23:15:54,437 INFO L226 Difference]: Without dead ends: 19 [2019-10-14 23:15:54,439 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:15:54,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-14 23:15:54,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-14 23:15:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-14 23:15:54,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-14 23:15:54,447 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-10-14 23:15:54,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:54,449 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-14 23:15:54,449 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-14 23:15:54,450 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-14 23:15:54,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-14 23:15:54,451 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:54,451 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:54,656 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:54,658 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:54,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:54,659 INFO L82 PathProgramCache]: Analyzing trace with hash -417206074, now seen corresponding path program 2 times [2019-10-14 23:15:54,659 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:54,660 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641688003] [2019-10-14 23:15:54,660 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,660 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:54,660 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:54,681 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:54,681 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856802298] [2019-10-14 23:15:54,681 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:54,720 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:54,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:54,721 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-14 23:15:54,723 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:54,918 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:54,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641688003] [2019-10-14 23:15:54,938 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:54,938 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856802298] [2019-10-14 23:15:54,939 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:54,939 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-14 23:15:54,939 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008881319] [2019-10-14 23:15:54,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-14 23:15:54,940 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:54,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-14 23:15:54,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-10-14 23:15:54,941 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-10-14 23:15:55,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:55,050 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-10-14 23:15:55,051 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-14 23:15:55,051 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-10-14 23:15:55,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:55,052 INFO L225 Difference]: With dead ends: 23 [2019-10-14 23:15:55,052 INFO L226 Difference]: Without dead ends: 20 [2019-10-14 23:15:55,053 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:15:55,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-14 23:15:55,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-14 23:15:55,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-14 23:15:55,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-14 23:15:55,058 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-10-14 23:15:55,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:55,058 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-14 23:15:55,058 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-14 23:15:55,058 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-14 23:15:55,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-14 23:15:55,059 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:55,059 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:55,263 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:55,264 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:55,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:55,264 INFO L82 PathProgramCache]: Analyzing trace with hash -48548864, now seen corresponding path program 3 times [2019-10-14 23:15:55,265 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:55,265 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100042756] [2019-10-14 23:15:55,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:55,266 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:55,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:55,280 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:55,280 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616387445] [2019-10-14 23:15:55,280 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:55,342 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-14 23:15:55,342 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:55,344 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-14 23:15:55,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:55,469 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:55,485 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100042756] [2019-10-14 23:15:55,486 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:55,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616387445] [2019-10-14 23:15:55,486 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:55,486 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-14 23:15:55,486 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566957041] [2019-10-14 23:15:55,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-14 23:15:55,487 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:55,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-14 23:15:55,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-14 23:15:55,488 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-10-14 23:15:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:55,628 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-10-14 23:15:55,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-14 23:15:55,628 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-10-14 23:15:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:55,629 INFO L225 Difference]: With dead ends: 24 [2019-10-14 23:15:55,629 INFO L226 Difference]: Without dead ends: 21 [2019-10-14 23:15:55,630 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:15:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-14 23:15:55,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-14 23:15:55,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-14 23:15:55,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-10-14 23:15:55,635 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-10-14 23:15:55,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:55,635 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-10-14 23:15:55,635 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-14 23:15:55,635 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-10-14 23:15:55,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-14 23:15:55,636 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:55,636 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:55,840 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:55,840 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:55,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:55,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1505077242, now seen corresponding path program 4 times [2019-10-14 23:15:55,842 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:55,842 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742590829] [2019-10-14 23:15:55,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:55,842 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:55,843 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:55,868 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:55,869 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1575654049] [2019-10-14 23:15:55,869 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:55,964 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:15:55,965 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:55,966 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-10-14 23:15:55,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:56,108 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:56,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742590829] [2019-10-14 23:15:56,134 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:56,135 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575654049] [2019-10-14 23:15:56,135 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:56,135 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-14 23:15:56,135 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138441288] [2019-10-14 23:15:56,136 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:15:56,136 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:56,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:15:56,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:15:56,137 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-10-14 23:15:56,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:56,316 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-10-14 23:15:56,316 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:15:56,316 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-10-14 23:15:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:56,317 INFO L225 Difference]: With dead ends: 25 [2019-10-14 23:15:56,317 INFO L226 Difference]: Without dead ends: 22 [2019-10-14 23:15:56,318 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:15:56,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-14 23:15:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-14 23:15:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-14 23:15:56,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-10-14 23:15:56,322 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-10-14 23:15:56,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:56,323 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-10-14 23:15:56,323 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:15:56,323 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-10-14 23:15:56,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-14 23:15:56,329 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:56,329 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:56,532 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:56,533 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:56,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:56,534 INFO L82 PathProgramCache]: Analyzing trace with hash 587183296, now seen corresponding path program 5 times [2019-10-14 23:15:56,534 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:56,535 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273887512] [2019-10-14 23:15:56,535 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,536 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:56,536 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:56,555 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:56,556 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1543831054] [2019-10-14 23:15:56,556 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:56,592 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-14 23:15:56,592 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:56,594 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-10-14 23:15:56,596 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:56,759 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:56,785 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:56,785 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273887512] [2019-10-14 23:15:56,785 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:56,785 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543831054] [2019-10-14 23:15:56,786 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:56,786 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-14 23:15:56,786 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382758904] [2019-10-14 23:15:56,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-14 23:15:56,787 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:56,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-14 23:15:56,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-10-14 23:15:56,787 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-10-14 23:15:56,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:56,939 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-10-14 23:15:56,939 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-14 23:15:56,940 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-10-14 23:15:56,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:56,941 INFO L225 Difference]: With dead ends: 26 [2019-10-14 23:15:56,941 INFO L226 Difference]: Without dead ends: 23 [2019-10-14 23:15:56,941 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:15:56,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-14 23:15:56,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-14 23:15:56,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-14 23:15:56,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-10-14 23:15:56,946 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-10-14 23:15:56,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:56,946 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-10-14 23:15:56,947 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-14 23:15:56,947 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-10-14 23:15:56,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-14 23:15:56,947 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:56,948 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:57,151 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:57,153 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:57,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:57,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1022750534, now seen corresponding path program 6 times [2019-10-14 23:15:57,154 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:57,154 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915404036] [2019-10-14 23:15:57,154 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:57,154 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:57,154 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:57,167 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:57,167 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [556367370] [2019-10-14 23:15:57,167 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:57,206 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-14 23:15:57,206 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:57,207 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-10-14 23:15:57,209 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:57,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:57,376 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915404036] [2019-10-14 23:15:57,376 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:57,377 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556367370] [2019-10-14 23:15:57,377 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:57,377 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-14 23:15:57,377 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944596172] [2019-10-14 23:15:57,378 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:15:57,378 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:57,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:15:57,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:15:57,379 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-10-14 23:15:57,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:57,560 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-10-14 23:15:57,561 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:15:57,561 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-10-14 23:15:57,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:57,562 INFO L225 Difference]: With dead ends: 27 [2019-10-14 23:15:57,562 INFO L226 Difference]: Without dead ends: 24 [2019-10-14 23:15:57,563 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:15:57,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-14 23:15:57,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-14 23:15:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-14 23:15:57,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-10-14 23:15:57,568 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-10-14 23:15:57,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:57,568 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-10-14 23:15:57,568 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:15:57,568 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-10-14 23:15:57,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-14 23:15:57,569 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:57,569 INFO L380 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:57,774 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:57,774 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:57,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:57,775 INFO L82 PathProgramCache]: Analyzing trace with hash 1640433024, now seen corresponding path program 7 times [2019-10-14 23:15:57,775 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:57,776 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731345752] [2019-10-14 23:15:57,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:57,776 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:57,776 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:57,790 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:57,790 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [241973576] [2019-10-14 23:15:57,791 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:57,833 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-10-14 23:15:57,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:58,014 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:58,037 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:58,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731345752] [2019-10-14 23:15:58,038 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:58,038 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241973576] [2019-10-14 23:15:58,039 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:58,039 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-14 23:15:58,039 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575780403] [2019-10-14 23:15:58,039 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-14 23:15:58,040 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:58,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-14 23:15:58,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-10-14 23:15:58,040 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-10-14 23:15:58,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:58,222 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-10-14 23:15:58,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-14 23:15:58,223 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-10-14 23:15:58,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:58,223 INFO L225 Difference]: With dead ends: 28 [2019-10-14 23:15:58,223 INFO L226 Difference]: Without dead ends: 25 [2019-10-14 23:15:58,224 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:15:58,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-14 23:15:58,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-14 23:15:58,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-14 23:15:58,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-10-14 23:15:58,229 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-10-14 23:15:58,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:58,229 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-10-14 23:15:58,229 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-14 23:15:58,229 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-10-14 23:15:58,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-14 23:15:58,230 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:58,230 INFO L380 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:58,433 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:58,434 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:58,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:58,434 INFO L82 PathProgramCache]: Analyzing trace with hash -686246266, now seen corresponding path program 8 times [2019-10-14 23:15:58,435 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:58,435 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842728194] [2019-10-14 23:15:58,436 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:58,436 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:58,436 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:58,456 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:58,456 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2109445930] [2019-10-14 23:15:58,456 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 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 [2019-10-14 23:15:58,496 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:58,496 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:58,497 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-10-14 23:15:58,499 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:58,679 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:58,702 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842728194] [2019-10-14 23:15:58,703 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:58,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109445930] [2019-10-14 23:15:58,703 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:58,704 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-14 23:15:58,704 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558013708] [2019-10-14 23:15:58,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:15:58,704 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:58,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:15:58,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:15:58,705 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-10-14 23:15:58,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:58,942 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-10-14 23:15:58,942 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:15:58,943 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-10-14 23:15:58,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:58,943 INFO L225 Difference]: With dead ends: 29 [2019-10-14 23:15:58,943 INFO L226 Difference]: Without dead ends: 26 [2019-10-14 23:15:58,944 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:15:58,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-14 23:15:58,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-14 23:15:58,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-14 23:15:58,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-14 23:15:58,949 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-10-14 23:15:58,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:58,949 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-14 23:15:58,949 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:15:58,949 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-14 23:15:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-14 23:15:58,950 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:58,950 INFO L380 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:59,158 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:59,159 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:59,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:59,160 INFO L82 PathProgramCache]: Analyzing trace with hash 201139776, now seen corresponding path program 9 times [2019-10-14 23:15:59,160 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:59,161 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700437701] [2019-10-14 23:15:59,161 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:59,161 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:59,162 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:59,177 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:59,179 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [587382631] [2019-10-14 23:15:59,179 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 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 [2019-10-14 23:15:59,227 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-14 23:15:59,227 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:59,228 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-10-14 23:15:59,230 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:59,431 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:15:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:59,454 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700437701] [2019-10-14 23:15:59,454 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:15:59,454 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587382631] [2019-10-14 23:15:59,454 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:15:59,455 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-14 23:15:59,455 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268502203] [2019-10-14 23:15:59,455 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-14 23:15:59,456 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:59,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-14 23:15:59,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-10-14 23:15:59,456 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-10-14 23:15:59,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:59,687 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-10-14 23:15:59,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-14 23:15:59,688 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-10-14 23:15:59,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:59,689 INFO L225 Difference]: With dead ends: 30 [2019-10-14 23:15:59,689 INFO L226 Difference]: Without dead ends: 27 [2019-10-14 23:15:59,690 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:15:59,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-14 23:15:59,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-14 23:15:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-14 23:15:59,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-10-14 23:15:59,695 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-10-14 23:15:59,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:59,695 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-10-14 23:15:59,695 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-14 23:15:59,695 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-10-14 23:15:59,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-14 23:15:59,696 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:59,696 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:59,899 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:59,900 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:59,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:59,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1940303302, now seen corresponding path program 10 times [2019-10-14 23:15:59,901 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:59,902 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38965502] [2019-10-14 23:15:59,902 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:59,902 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:59,903 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:59,914 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:15:59,914 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [546189360] [2019-10-14 23:15:59,915 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 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 [2019-10-14 23:16:00,043 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:00,043 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:00,045 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-10-14 23:16:00,047 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:00,291 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:00,313 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:00,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38965502] [2019-10-14 23:16:00,314 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:00,314 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546189360] [2019-10-14 23:16:00,314 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:00,314 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-14 23:16:00,314 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869889459] [2019-10-14 23:16:00,315 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-14 23:16:00,315 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:00,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-14 23:16:00,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-10-14 23:16:00,316 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-10-14 23:16:00,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:00,618 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-10-14 23:16:00,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-14 23:16:00,618 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-10-14 23:16:00,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:00,620 INFO L225 Difference]: With dead ends: 31 [2019-10-14 23:16:00,620 INFO L226 Difference]: Without dead ends: 28 [2019-10-14 23:16:00,621 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:16:00,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-14 23:16:00,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-14 23:16:00,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-14 23:16:00,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-10-14 23:16:00,626 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-10-14 23:16:00,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:00,627 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-10-14 23:16:00,627 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-14 23:16:00,627 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-10-14 23:16:00,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 23:16:00,628 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:00,628 INFO L380 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:00,836 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:00,837 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:00,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:00,838 INFO L82 PathProgramCache]: Analyzing trace with hash 19797760, now seen corresponding path program 11 times [2019-10-14 23:16:00,838 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:00,839 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195362380] [2019-10-14 23:16:00,839 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:00,839 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:00,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:00,850 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:00,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1393366184] [2019-10-14 23:16:00,851 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 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 [2019-10-14 23:16:00,909 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-14 23:16:00,909 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:00,912 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-10-14 23:16:00,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:01,142 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:01,175 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:01,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195362380] [2019-10-14 23:16:01,176 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:01,176 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393366184] [2019-10-14 23:16:01,176 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:01,177 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-14 23:16:01,177 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334354163] [2019-10-14 23:16:01,177 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-14 23:16:01,177 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:01,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-14 23:16:01,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-10-14 23:16:01,178 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-10-14 23:16:01,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:01,492 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-10-14 23:16:01,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-14 23:16:01,493 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-10-14 23:16:01,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:01,494 INFO L225 Difference]: With dead ends: 32 [2019-10-14 23:16:01,494 INFO L226 Difference]: Without dead ends: 29 [2019-10-14 23:16:01,495 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:16:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-14 23:16:01,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-14 23:16:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-14 23:16:01,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-10-14 23:16:01,501 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-10-14 23:16:01,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:01,501 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-10-14 23:16:01,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-14 23:16:01,502 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-10-14 23:16:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-14 23:16:01,502 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:01,502 INFO L380 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:01,706 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:01,706 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:01,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:01,707 INFO L82 PathProgramCache]: Analyzing trace with hash 613668102, now seen corresponding path program 12 times [2019-10-14 23:16:01,707 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:01,708 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233922715] [2019-10-14 23:16:01,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:01,708 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:01,708 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:01,719 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:01,720 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [426907146] [2019-10-14 23:16:01,720 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 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 [2019-10-14 23:16:01,804 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-14 23:16:01,805 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:01,809 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 83 conjunts are in the unsatisfiable core [2019-10-14 23:16:01,811 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:02,131 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:02,148 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:02,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233922715] [2019-10-14 23:16:02,149 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:02,149 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426907146] [2019-10-14 23:16:02,150 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:02,150 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-14 23:16:02,150 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628173067] [2019-10-14 23:16:02,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 23:16:02,151 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:02,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 23:16:02,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:16:02,152 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 22 states. [2019-10-14 23:16:02,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:02,529 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-10-14 23:16:02,529 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 23:16:02,530 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 28 [2019-10-14 23:16:02,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:02,531 INFO L225 Difference]: With dead ends: 33 [2019-10-14 23:16:02,531 INFO L226 Difference]: Without dead ends: 30 [2019-10-14 23:16:02,532 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:16:02,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-14 23:16:02,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-14 23:16:02,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-14 23:16:02,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-10-14 23:16:02,537 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-10-14 23:16:02,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:02,537 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-10-14 23:16:02,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 23:16:02,538 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-10-14 23:16:02,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 23:16:02,538 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:02,539 INFO L380 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:02,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:02,742 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:02,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:02,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1843779520, now seen corresponding path program 13 times [2019-10-14 23:16:02,743 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:02,744 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906255452] [2019-10-14 23:16:02,744 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:02,744 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:02,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:02,769 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:02,770 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636114751] [2019-10-14 23:16:02,770 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-10-14 23:16:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:02,816 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-10-14 23:16:02,818 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:03,084 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:03,112 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:03,112 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906255452] [2019-10-14 23:16:03,112 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:03,112 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636114751] [2019-10-14 23:16:03,113 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:03,113 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-14 23:16:03,113 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169988653] [2019-10-14 23:16:03,113 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 23:16:03,113 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:03,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 23:16:03,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:16:03,114 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-10-14 23:16:03,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:03,498 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-10-14 23:16:03,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 23:16:03,499 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-10-14 23:16:03,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:03,499 INFO L225 Difference]: With dead ends: 34 [2019-10-14 23:16:03,500 INFO L226 Difference]: Without dead ends: 31 [2019-10-14 23:16:03,500 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:16:03,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-14 23:16:03,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-14 23:16:03,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-14 23:16:03,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-10-14 23:16:03,505 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-10-14 23:16:03,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:03,506 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-10-14 23:16:03,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 23:16:03,506 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-10-14 23:16:03,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-14 23:16:03,507 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:03,507 INFO L380 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:03,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:03,711 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:03,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:03,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1322527814, now seen corresponding path program 14 times [2019-10-14 23:16:03,711 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:03,712 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364091692] [2019-10-14 23:16:03,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:03,712 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:03,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:03,730 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:03,730 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1713504039] [2019-10-14 23:16:03,730 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 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 [2019-10-14 23:16:03,793 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:03,793 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:03,795 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-10-14 23:16:03,797 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:04,079 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:04,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364091692] [2019-10-14 23:16:04,102 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:04,102 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713504039] [2019-10-14 23:16:04,102 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:04,102 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-10-14 23:16:04,102 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92880391] [2019-10-14 23:16:04,103 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-14 23:16:04,103 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:04,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-14 23:16:04,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:16:04,103 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-10-14 23:16:04,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:04,449 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-10-14 23:16:04,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-14 23:16:04,454 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-10-14 23:16:04,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:04,455 INFO L225 Difference]: With dead ends: 35 [2019-10-14 23:16:04,455 INFO L226 Difference]: Without dead ends: 32 [2019-10-14 23:16:04,456 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:16:04,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-14 23:16:04,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-14 23:16:04,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-14 23:16:04,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-10-14 23:16:04,465 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-10-14 23:16:04,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:04,466 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-10-14 23:16:04,466 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-14 23:16:04,466 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-10-14 23:16:04,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:16:04,472 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:04,472 INFO L380 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:04,677 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:04,677 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:04,678 INFO L82 PathProgramCache]: Analyzing trace with hash -1951373184, now seen corresponding path program 15 times [2019-10-14 23:16:04,678 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:04,678 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682110887] [2019-10-14 23:16:04,678 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:04,679 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:04,679 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:04,690 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:04,691 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369472948] [2019-10-14 23:16:04,691 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 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 [2019-10-14 23:16:04,830 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-14 23:16:04,830 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:04,832 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-10-14 23:16:04,834 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:05,298 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:05,331 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:05,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682110887] [2019-10-14 23:16:05,332 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:05,332 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369472948] [2019-10-14 23:16:05,332 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:05,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-10-14 23:16:05,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991744088] [2019-10-14 23:16:05,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-14 23:16:05,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:05,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-14 23:16:05,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-10-14 23:16:05,334 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-10-14 23:16:05,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:05,724 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-10-14 23:16:05,725 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-14 23:16:05,725 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-10-14 23:16:05,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:05,726 INFO L225 Difference]: With dead ends: 36 [2019-10-14 23:16:05,726 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:16:05,727 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:16:05,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:16:05,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-14 23:16:05,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:16:05,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-10-14 23:16:05,732 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-10-14 23:16:05,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:05,733 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-10-14 23:16:05,733 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-14 23:16:05,733 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-10-14 23:16:05,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-14 23:16:05,733 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:05,734 INFO L380 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:05,937 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:05,938 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:05,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:05,938 INFO L82 PathProgramCache]: Analyzing trace with hash -363089018, now seen corresponding path program 16 times [2019-10-14 23:16:05,939 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:05,939 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800095901] [2019-10-14 23:16:05,939 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:05,940 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:05,940 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:05,950 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:05,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1644155828] [2019-10-14 23:16:05,950 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 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 [2019-10-14 23:16:06,123 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:06,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:06,125 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-10-14 23:16:06,126 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:06,487 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:06,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800095901] [2019-10-14 23:16:06,518 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:06,518 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644155828] [2019-10-14 23:16:06,518 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:06,518 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-10-14 23:16:06,519 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781004804] [2019-10-14 23:16:06,519 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-14 23:16:06,519 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:06,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-14 23:16:06,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-10-14 23:16:06,520 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-10-14 23:16:06,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:06,977 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-10-14 23:16:06,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-14 23:16:06,978 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-10-14 23:16:06,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:06,979 INFO L225 Difference]: With dead ends: 37 [2019-10-14 23:16:06,979 INFO L226 Difference]: Without dead ends: 34 [2019-10-14 23:16:06,980 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=599, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:16:06,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-14 23:16:06,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-14 23:16:06,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-14 23:16:06,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-10-14 23:16:06,985 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-10-14 23:16:06,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:06,986 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-10-14 23:16:06,986 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-14 23:16:06,986 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-10-14 23:16:06,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-14 23:16:06,987 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:06,987 INFO L380 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:07,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:07,190 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:07,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:07,191 INFO L82 PathProgramCache]: Analyzing trace with hash 1629079872, now seen corresponding path program 17 times [2019-10-14 23:16:07,191 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:07,192 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782582203] [2019-10-14 23:16:07,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:07,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:07,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:07,202 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:07,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612634423] [2019-10-14 23:16:07,202 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 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 [2019-10-14 23:16:07,295 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-14 23:16:07,295 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:07,298 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-10-14 23:16:07,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:07,694 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:07,724 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:07,724 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782582203] [2019-10-14 23:16:07,724 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:07,725 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612634423] [2019-10-14 23:16:07,725 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:07,725 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-10-14 23:16:07,726 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412834251] [2019-10-14 23:16:07,726 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-14 23:16:07,726 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:07,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-14 23:16:07,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-10-14 23:16:07,731 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-10-14 23:16:08,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:08,218 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-10-14 23:16:08,218 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-14 23:16:08,218 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-10-14 23:16:08,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:08,219 INFO L225 Difference]: With dead ends: 38 [2019-10-14 23:16:08,219 INFO L226 Difference]: Without dead ends: 35 [2019-10-14 23:16:08,220 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:16:08,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-14 23:16:08,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-14 23:16:08,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-14 23:16:08,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-10-14 23:16:08,226 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-10-14 23:16:08,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:08,226 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-10-14 23:16:08,226 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-14 23:16:08,226 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-10-14 23:16:08,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-14 23:16:08,227 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:08,227 INFO L380 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:08,436 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:08,436 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:08,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:08,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1038193978, now seen corresponding path program 18 times [2019-10-14 23:16:08,437 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:08,437 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142088467] [2019-10-14 23:16:08,437 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,438 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:08,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:08,447 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:08,447 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [734272383] [2019-10-14 23:16:08,447 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:08,580 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-14 23:16:08,580 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:08,582 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-10-14 23:16:08,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:08,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:08,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142088467] [2019-10-14 23:16:08,994 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:08,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734272383] [2019-10-14 23:16:08,995 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:08,995 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-10-14 23:16:08,995 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202107575] [2019-10-14 23:16:08,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-14 23:16:08,996 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:08,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-14 23:16:08,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:16:08,996 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-10-14 23:16:09,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:09,500 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-10-14 23:16:09,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-14 23:16:09,500 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-10-14 23:16:09,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:09,500 INFO L225 Difference]: With dead ends: 39 [2019-10-14 23:16:09,501 INFO L226 Difference]: Without dead ends: 36 [2019-10-14 23:16:09,501 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=55, Invalid=701, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:16:09,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-14 23:16:09,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-14 23:16:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-14 23:16:09,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-10-14 23:16:09,507 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-10-14 23:16:09,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:09,507 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-10-14 23:16:09,507 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-14 23:16:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-10-14 23:16:09,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 23:16:09,508 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:09,508 INFO L380 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:09,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:09,712 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:09,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:09,712 INFO L82 PathProgramCache]: Analyzing trace with hash -2119304704, now seen corresponding path program 19 times [2019-10-14 23:16:09,713 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:09,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175426718] [2019-10-14 23:16:09,713 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,714 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:09,723 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:09,724 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [582892906] [2019-10-14 23:16:09,724 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:09,785 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-10-14 23:16:09,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:10,230 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:10,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175426718] [2019-10-14 23:16:10,258 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:10,258 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582892906] [2019-10-14 23:16:10,258 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:10,259 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-10-14 23:16:10,259 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688356458] [2019-10-14 23:16:10,259 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-14 23:16:10,259 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:10,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-14 23:16:10,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-10-14 23:16:10,260 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-10-14 23:16:10,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:10,810 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-10-14 23:16:10,811 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-14 23:16:10,811 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-10-14 23:16:10,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:10,812 INFO L225 Difference]: With dead ends: 40 [2019-10-14 23:16:10,812 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 23:16:10,813 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=755, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:16:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 23:16:10,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-14 23:16:10,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:16:10,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-10-14 23:16:10,818 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-10-14 23:16:10,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:10,819 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-10-14 23:16:10,819 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-14 23:16:10,819 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-10-14 23:16:10,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-14 23:16:10,819 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:10,820 INFO L380 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:11,022 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:11,023 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:11,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1273998842, now seen corresponding path program 20 times [2019-10-14 23:16:11,024 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:11,024 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108608212] [2019-10-14 23:16:11,024 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:11,024 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:11,025 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:11,035 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:11,035 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907743179] [2019-10-14 23:16:11,035 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:11,110 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:11,110 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:11,112 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-10-14 23:16:11,113 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:11,544 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:11,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108608212] [2019-10-14 23:16:11,576 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:11,576 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907743179] [2019-10-14 23:16:11,576 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:11,577 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-10-14 23:16:11,577 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545861748] [2019-10-14 23:16:11,577 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-14 23:16:11,577 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:11,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-14 23:16:11,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-10-14 23:16:11,578 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-10-14 23:16:12,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:12,174 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-10-14 23:16:12,174 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-14 23:16:12,174 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-10-14 23:16:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:12,175 INFO L225 Difference]: With dead ends: 41 [2019-10-14 23:16:12,175 INFO L226 Difference]: Without dead ends: 38 [2019-10-14 23:16:12,175 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:16:12,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-14 23:16:12,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-14 23:16:12,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-14 23:16:12,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-10-14 23:16:12,181 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-10-14 23:16:12,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:12,181 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-10-14 23:16:12,181 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-14 23:16:12,181 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-10-14 23:16:12,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-14 23:16:12,182 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:12,182 INFO L380 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:12,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:12,386 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:12,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:12,386 INFO L82 PathProgramCache]: Analyzing trace with hash -839320896, now seen corresponding path program 21 times [2019-10-14 23:16:12,387 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:12,387 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291562035] [2019-10-14 23:16:12,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:12,387 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:12,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:12,398 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:12,399 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1945969067] [2019-10-14 23:16:12,399 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:12,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-14 23:16:12,685 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:12,687 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-10-14 23:16:12,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:13,140 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:13,170 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:13,171 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291562035] [2019-10-14 23:16:13,171 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:13,171 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945969067] [2019-10-14 23:16:13,171 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:13,171 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-10-14 23:16:13,172 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479157014] [2019-10-14 23:16:13,172 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-14 23:16:13,172 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:13,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-14 23:16:13,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-10-14 23:16:13,173 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-10-14 23:16:13,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:13,793 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-10-14 23:16:13,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-14 23:16:13,795 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-10-14 23:16:13,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:13,796 INFO L225 Difference]: With dead ends: 42 [2019-10-14 23:16:13,796 INFO L226 Difference]: Without dead ends: 39 [2019-10-14 23:16:13,797 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=869, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:16:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-14 23:16:13,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-14 23:16:13,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-14 23:16:13,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-10-14 23:16:13,802 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-10-14 23:16:13,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:13,803 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-10-14 23:16:13,803 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-14 23:16:13,803 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-10-14 23:16:13,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-14 23:16:13,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:13,804 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:14,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:14,007 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:14,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:14,008 INFO L82 PathProgramCache]: Analyzing trace with hash -249206458, now seen corresponding path program 22 times [2019-10-14 23:16:14,008 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:14,009 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969876645] [2019-10-14 23:16:14,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:14,009 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:14,009 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:14,018 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:14,018 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1595793611] [2019-10-14 23:16:14,018 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:14,249 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:14,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:14,251 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-10-14 23:16:14,252 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:14,734 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:14,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969876645] [2019-10-14 23:16:14,763 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:14,763 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595793611] [2019-10-14 23:16:14,763 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:14,763 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-10-14 23:16:14,763 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389352737] [2019-10-14 23:16:14,764 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 23:16:14,764 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:14,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 23:16:14,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:16:14,765 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-10-14 23:16:15,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:15,433 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-10-14 23:16:15,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 23:16:15,434 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-10-14 23:16:15,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:15,435 INFO L225 Difference]: With dead ends: 43 [2019-10-14 23:16:15,435 INFO L226 Difference]: Without dead ends: 40 [2019-10-14 23:16:15,436 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=63, Invalid=929, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:16:15,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-14 23:16:15,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-14 23:16:15,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-14 23:16:15,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-10-14 23:16:15,442 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-10-14 23:16:15,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:15,442 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-10-14 23:16:15,442 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 23:16:15,442 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-10-14 23:16:15,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 23:16:15,443 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:15,443 INFO L380 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:15,646 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:15,647 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:15,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:15,648 INFO L82 PathProgramCache]: Analyzing trace with hash 864471936, now seen corresponding path program 23 times [2019-10-14 23:16:15,648 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:15,648 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970707475] [2019-10-14 23:16:15,648 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:15,649 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:15,649 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:15,657 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:15,658 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1655328899] [2019-10-14 23:16:15,658 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:15,741 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-14 23:16:15,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:15,745 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-10-14 23:16:15,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:16,296 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:16,327 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:16,327 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970707475] [2019-10-14 23:16:16,327 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:16,328 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655328899] [2019-10-14 23:16:16,328 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:16,328 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-10-14 23:16:16,328 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984598027] [2019-10-14 23:16:16,328 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-14 23:16:16,329 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:16,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-14 23:16:16,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-10-14 23:16:16,329 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-10-14 23:16:17,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:17,043 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-10-14 23:16:17,044 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-14 23:16:17,044 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-10-14 23:16:17,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:17,045 INFO L225 Difference]: With dead ends: 44 [2019-10-14 23:16:17,045 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:16:17,046 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:16:17,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:16:17,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-14 23:16:17,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:16:17,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-10-14 23:16:17,052 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-10-14 23:16:17,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:17,052 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-10-14 23:16:17,052 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-14 23:16:17,052 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-10-14 23:16:17,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-14 23:16:17,053 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:17,053 INFO L380 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:17,255 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:17,256 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:17,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:17,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1028763782, now seen corresponding path program 24 times [2019-10-14 23:16:17,257 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:17,257 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037522057] [2019-10-14 23:16:17,257 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:17,257 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:17,258 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:17,267 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:17,267 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [519857519] [2019-10-14 23:16:17,267 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:17,396 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-14 23:16:17,396 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:17,398 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-10-14 23:16:17,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:17,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:17,989 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:17,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037522057] [2019-10-14 23:16:17,990 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:17,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519857519] [2019-10-14 23:16:17,990 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:17,990 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-10-14 23:16:17,990 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686633139] [2019-10-14 23:16:17,991 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-14 23:16:17,991 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:17,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-14 23:16:17,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-10-14 23:16:17,992 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-10-14 23:16:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:18,777 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-10-14 23:16:18,777 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-14 23:16:18,777 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-10-14 23:16:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:18,778 INFO L225 Difference]: With dead ends: 45 [2019-10-14 23:16:18,778 INFO L226 Difference]: Without dead ends: 42 [2019-10-14 23:16:18,779 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=1055, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:16:18,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-14 23:16:18,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-14 23:16:18,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-14 23:16:18,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-10-14 23:16:18,783 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-10-14 23:16:18,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:18,784 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-10-14 23:16:18,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-14 23:16:18,784 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-10-14 23:16:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-14 23:16:18,784 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:18,785 INFO L380 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:18,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:18,989 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:18,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:18,990 INFO L82 PathProgramCache]: Analyzing trace with hash 1826843712, now seen corresponding path program 25 times [2019-10-14 23:16:18,990 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:18,991 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891487945] [2019-10-14 23:16:18,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:18,991 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:18,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:18,999 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:19,000 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1242953783] [2019-10-14 23:16:19,000 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:19,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:19,090 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-10-14 23:16:19,091 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:19,668 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:19,702 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:19,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891487945] [2019-10-14 23:16:19,703 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:19,703 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242953783] [2019-10-14 23:16:19,703 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:19,703 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-10-14 23:16:19,704 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097994082] [2019-10-14 23:16:19,704 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-14 23:16:19,704 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:19,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-14 23:16:19,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-10-14 23:16:19,705 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-10-14 23:16:20,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:20,523 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-10-14 23:16:20,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-14 23:16:20,523 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-10-14 23:16:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:20,524 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:16:20,524 INFO L226 Difference]: Without dead ends: 43 [2019-10-14 23:16:20,525 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=69, Invalid=1121, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:16:20,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-14 23:16:20,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-14 23:16:20,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-14 23:16:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-10-14 23:16:20,531 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-10-14 23:16:20,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:20,532 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-10-14 23:16:20,532 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-14 23:16:20,532 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-10-14 23:16:20,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-14 23:16:20,532 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:20,533 INFO L380 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:20,736 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:20,736 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:20,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:20,737 INFO L82 PathProgramCache]: Analyzing trace with hash 797517766, now seen corresponding path program 26 times [2019-10-14 23:16:20,737 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:20,737 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591613900] [2019-10-14 23:16:20,737 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:20,737 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:20,737 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:20,746 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:20,746 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [967866983] [2019-10-14 23:16:20,747 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:20,836 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:20,836 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:20,838 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-10-14 23:16:20,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:21,430 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:21,482 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:21,482 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591613900] [2019-10-14 23:16:21,483 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:21,483 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967866983] [2019-10-14 23:16:21,483 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:21,483 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-10-14 23:16:21,484 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635297844] [2019-10-14 23:16:21,484 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-14 23:16:21,484 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:21,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-14 23:16:21,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-10-14 23:16:21,485 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-10-14 23:16:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:22,294 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-10-14 23:16:22,294 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-14 23:16:22,294 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-10-14 23:16:22,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:22,295 INFO L225 Difference]: With dead ends: 47 [2019-10-14 23:16:22,295 INFO L226 Difference]: Without dead ends: 44 [2019-10-14 23:16:22,297 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=1189, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:16:22,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-14 23:16:22,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-14 23:16:22,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-14 23:16:22,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-10-14 23:16:22,302 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-10-14 23:16:22,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:22,302 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-10-14 23:16:22,302 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-14 23:16:22,302 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-10-14 23:16:22,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-14 23:16:22,302 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:22,303 INFO L380 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:22,503 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:22,504 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:22,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:22,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1046815488, now seen corresponding path program 27 times [2019-10-14 23:16:22,504 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:22,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928002639] [2019-10-14 23:16:22,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:22,505 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:22,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:22,514 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:22,514 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2142860178] [2019-10-14 23:16:22,514 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:23,125 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-14 23:16:23,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:23,128 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-10-14 23:16:23,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:23,761 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:23,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928002639] [2019-10-14 23:16:23,799 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:23,799 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142860178] [2019-10-14 23:16:23,799 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:23,799 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-10-14 23:16:23,799 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642248785] [2019-10-14 23:16:23,800 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-14 23:16:23,800 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:23,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-14 23:16:23,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-10-14 23:16:23,801 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-10-14 23:16:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:24,729 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-10-14 23:16:24,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-14 23:16:24,730 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-10-14 23:16:24,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:24,731 INFO L225 Difference]: With dead ends: 48 [2019-10-14 23:16:24,731 INFO L226 Difference]: Without dead ends: 45 [2019-10-14 23:16:24,732 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=1259, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 23:16:24,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-14 23:16:24,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-10-14 23:16:24,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-14 23:16:24,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-10-14 23:16:24,737 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-10-14 23:16:24,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:24,738 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-10-14 23:16:24,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-14 23:16:24,738 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-10-14 23:16:24,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-14 23:16:24,738 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:24,738 INFO L380 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:24,939 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:24,939 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:24,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:24,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1908395782, now seen corresponding path program 28 times [2019-10-14 23:16:24,940 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:24,940 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435390347] [2019-10-14 23:16:24,940 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:24,941 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:24,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:24,950 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:24,950 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394742668] [2019-10-14 23:16:24,951 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:25,587 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:25,587 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:25,591 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-10-14 23:16:25,593 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:26,331 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:26,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435390347] [2019-10-14 23:16:26,381 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:26,381 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394742668] [2019-10-14 23:16:26,382 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:26,382 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-10-14 23:16:26,382 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078687457] [2019-10-14 23:16:26,382 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-14 23:16:26,382 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:26,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-14 23:16:26,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-10-14 23:16:26,383 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-10-14 23:16:27,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:27,347 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-10-14 23:16:27,347 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-14 23:16:27,347 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-10-14 23:16:27,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:27,348 INFO L225 Difference]: With dead ends: 49 [2019-10-14 23:16:27,348 INFO L226 Difference]: Without dead ends: 46 [2019-10-14 23:16:27,349 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=75, Invalid=1331, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 23:16:27,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-14 23:16:27,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-14 23:16:27,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 23:16:27,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-10-14 23:16:27,356 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-10-14 23:16:27,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:27,356 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-10-14 23:16:27,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-14 23:16:27,356 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-10-14 23:16:27,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 23:16:27,357 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:27,357 INFO L380 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:27,559 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:27,560 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:27,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:27,560 INFO L82 PathProgramCache]: Analyzing trace with hash -969335360, now seen corresponding path program 29 times [2019-10-14 23:16:27,561 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:27,561 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210048535] [2019-10-14 23:16:27,561 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:27,562 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:27,562 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:27,570 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:27,570 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2099605638] [2019-10-14 23:16:27,571 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:27,677 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-14 23:16:27,677 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:27,682 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-10-14 23:16:27,684 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:28,392 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:28,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210048535] [2019-10-14 23:16:28,428 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:28,428 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099605638] [2019-10-14 23:16:28,428 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:28,428 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-10-14 23:16:28,428 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29396795] [2019-10-14 23:16:28,429 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-14 23:16:28,429 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:28,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-14 23:16:28,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-10-14 23:16:28,429 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-10-14 23:16:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:29,456 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-10-14 23:16:29,456 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-14 23:16:29,456 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-10-14 23:16:29,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:29,457 INFO L225 Difference]: With dead ends: 50 [2019-10-14 23:16:29,457 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:16:29,459 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=1405, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:16:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:16:29,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-14 23:16:29,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:16:29,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-10-14 23:16:29,464 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-10-14 23:16:29,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:29,464 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-10-14 23:16:29,464 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-14 23:16:29,465 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-10-14 23:16:29,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-14 23:16:29,465 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:29,465 INFO L380 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:29,665 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:29,666 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:29,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:29,666 INFO L82 PathProgramCache]: Analyzing trace with hash 15312454, now seen corresponding path program 30 times [2019-10-14 23:16:29,667 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:29,667 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840873180] [2019-10-14 23:16:29,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:29,667 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:29,668 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:29,677 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:29,677 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60988664] [2019-10-14 23:16:29,677 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:29,974 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-14 23:16:29,974 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:29,978 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-10-14 23:16:29,979 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:30,745 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:30,783 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:30,783 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840873180] [2019-10-14 23:16:30,783 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:30,784 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60988664] [2019-10-14 23:16:30,784 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:30,784 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-10-14 23:16:30,784 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579885778] [2019-10-14 23:16:30,784 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-14 23:16:30,784 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:30,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-14 23:16:30,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:16:30,785 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-10-14 23:16:31,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:31,827 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-10-14 23:16:31,827 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-14 23:16:31,828 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-10-14 23:16:31,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:31,829 INFO L225 Difference]: With dead ends: 51 [2019-10-14 23:16:31,829 INFO L226 Difference]: Without dead ends: 48 [2019-10-14 23:16:31,830 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=79, Invalid=1481, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 23:16:31,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-14 23:16:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-14 23:16:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-14 23:16:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-10-14 23:16:31,835 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-10-14 23:16:31,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:31,835 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-10-14 23:16:31,835 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-14 23:16:31,835 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-10-14 23:16:31,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-14 23:16:31,836 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:31,836 INFO L380 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:32,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:32,038 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:32,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:32,038 INFO L82 PathProgramCache]: Analyzing trace with hash 474623616, now seen corresponding path program 31 times [2019-10-14 23:16:32,039 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:32,039 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731185230] [2019-10-14 23:16:32,039 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:32,039 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:32,040 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:32,049 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:32,049 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438559223] [2019-10-14 23:16:32,049 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:32,190 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-10-14 23:16:32,193 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:33,193 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:33,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731185230] [2019-10-14 23:16:33,233 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:33,233 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438559223] [2019-10-14 23:16:33,233 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:33,233 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-10-14 23:16:33,234 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75330495] [2019-10-14 23:16:33,234 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-14 23:16:33,234 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:33,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-14 23:16:33,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-10-14 23:16:33,235 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-10-14 23:16:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:34,360 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-10-14 23:16:34,361 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-14 23:16:34,361 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-10-14 23:16:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:34,362 INFO L225 Difference]: With dead ends: 52 [2019-10-14 23:16:34,362 INFO L226 Difference]: Without dead ends: 49 [2019-10-14 23:16:34,363 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 23:16:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-14 23:16:34,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-10-14 23:16:34,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-14 23:16:34,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-10-14 23:16:34,368 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-10-14 23:16:34,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:34,368 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-10-14 23:16:34,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-14 23:16:34,369 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-10-14 23:16:34,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-14 23:16:34,369 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:34,369 INFO L380 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:34,573 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:34,573 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:34,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:34,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1828367750, now seen corresponding path program 32 times [2019-10-14 23:16:34,574 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:34,574 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363063512] [2019-10-14 23:16:34,574 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:34,575 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:34,575 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:34,584 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:34,584 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939439589] [2019-10-14 23:16:34,584 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:34,685 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:16:34,686 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:34,688 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-10-14 23:16:34,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:35,530 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:35,748 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:35,748 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363063512] [2019-10-14 23:16:35,749 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:35,749 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939439589] [2019-10-14 23:16:35,749 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:35,749 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-10-14 23:16:35,750 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607266708] [2019-10-14 23:16:35,750 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-14 23:16:35,750 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:35,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-14 23:16:35,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 23:16:35,752 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-10-14 23:16:37,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:37,007 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-10-14 23:16:37,008 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-14 23:16:37,008 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-10-14 23:16:37,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:37,009 INFO L225 Difference]: With dead ends: 53 [2019-10-14 23:16:37,009 INFO L226 Difference]: Without dead ends: 50 [2019-10-14 23:16:37,011 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=83, Invalid=1639, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 23:16:37,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-14 23:16:37,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-14 23:16:37,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-14 23:16:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-10-14 23:16:37,023 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-10-14 23:16:37,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:37,024 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-10-14 23:16:37,024 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-14 23:16:37,024 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-10-14 23:16:37,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-14 23:16:37,025 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:37,025 INFO L380 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:37,228 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:37,229 INFO L410 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:37,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:37,229 INFO L82 PathProgramCache]: Analyzing trace with hash 844762944, now seen corresponding path program 33 times [2019-10-14 23:16:37,230 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:37,230 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669454251] [2019-10-14 23:16:37,230 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:37,230 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:37,231 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:37,238 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:37,238 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1505774611] [2019-10-14 23:16:37,239 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:38,207 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-10-14 23:16:38,208 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:38,210 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-10-14 23:16:38,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:39,080 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:39,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669454251] [2019-10-14 23:16:39,121 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:39,121 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505774611] [2019-10-14 23:16:39,122 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:39,122 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-10-14 23:16:39,122 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629623924] [2019-10-14 23:16:39,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-14 23:16:39,122 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:39,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-14 23:16:39,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 23:16:39,123 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2019-10-14 23:16:40,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:40,398 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-10-14 23:16:40,399 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-14 23:16:40,399 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2019-10-14 23:16:40,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:40,399 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:16:40,400 INFO L226 Difference]: Without dead ends: 51 [2019-10-14 23:16:40,400 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=85, Invalid=1721, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 23:16:40,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-14 23:16:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-14 23:16:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-14 23:16:40,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-10-14 23:16:40,406 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-10-14 23:16:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:40,406 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-10-14 23:16:40,407 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-14 23:16:40,407 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-10-14 23:16:40,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-14 23:16:40,407 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:40,407 INFO L380 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:40,611 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:40,611 INFO L410 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:40,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:40,612 INFO L82 PathProgramCache]: Analyzing trace with hash 417785030, now seen corresponding path program 34 times [2019-10-14 23:16:40,612 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:40,612 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535645506] [2019-10-14 23:16:40,612 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:40,613 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:40,613 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:40,621 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-14 23:16:40,622 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1662990980] [2019-10-14 23:16:40,622 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:41,010 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:41,011 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:41,013 WARN L254 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 167 conjunts are in the unsatisfiable core [2019-10-14 23:16:41,014 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:41,920 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-14 23:16:41,961 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:41,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535645506] [2019-10-14 23:16:41,962 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-14 23:16:41,962 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662990980] [2019-10-14 23:16:41,962 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-14 23:16:41,962 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-10-14 23:16:41,962 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646082910] [2019-10-14 23:16:41,963 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-14 23:16:41,963 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:41,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-14 23:16:41,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 23:16:41,964 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 43 states.