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+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-f4eb214f-m [2019-10-13 19:16:50,071 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-13 19:16:50,073 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-13 19:16:50,092 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-13 19:16:50,092 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-13 19:16:50,095 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-13 19:16:50,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-13 19:16:50,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-13 19:16:50,111 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-13 19:16:50,114 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-13 19:16:50,116 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-13 19:16:50,118 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-13 19:16:50,119 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-13 19:16:50,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-13 19:16:50,123 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-13 19:16:50,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-13 19:16:50,126 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-13 19:16:50,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-13 19:16:50,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-13 19:16:50,133 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-13 19:16:50,138 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-13 19:16:50,141 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-13 19:16:50,144 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-13 19:16:50,145 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-13 19:16:50,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-13 19:16:50,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-13 19:16:50,153 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-13 19:16:50,154 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-13 19:16:50,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-13 19:16:50,156 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-13 19:16:50,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-13 19:16:50,157 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-13 19:16:50,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-13 19:16:50,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-13 19:16:50,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-13 19:16:50,159 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-13 19:16:50,160 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 [2019-10-13 19:16:50,195 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-13 19:16:50,195 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-13 19:16:50,200 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-13 19:16:50,200 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-13 19:16:50,200 INFO L138 SettingsManager]: * Use SBE=true [2019-10-13 19:16:50,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-13 19:16:50,201 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-13 19:16:50,201 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-13 19:16:50,201 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-13 19:16:50,201 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-13 19:16:50,202 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-13 19:16:50,202 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-13 19:16:50,202 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-13 19:16:50,205 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-13 19:16:50,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-13 19:16:50,205 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-13 19:16:50,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-13 19:16:50,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-13 19:16:50,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-13 19:16:50,206 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-13 19:16:50,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-13 19:16:50,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-13 19:16:50,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-13 19:16:50,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-13 19:16:50,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-13 19:16:50,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-13 19:16:50,208 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-13 19:16:50,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-13 19:16:50,208 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-13 19:16:50,521 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-13 19:16:50,530 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-13 19:16:50,534 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-13 19:16:50,537 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-13 19:16:50,537 INFO L275 PluginConnector]: CDTParser initialized [2019-10-13 19:16:50,538 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-10-13 19:16:50,613 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a078b614/39fff0549560407cba919a0aa8c62e2f/FLAG445ec834e [2019-10-13 19:16:51,098 INFO L306 CDTParser]: Found 1 translation units. [2019-10-13 19:16:51,099 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i.p+cfa-reducer.c [2019-10-13 19:16:51,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a078b614/39fff0549560407cba919a0aa8c62e2f/FLAG445ec834e [2019-10-13 19:16:51,482 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7a078b614/39fff0549560407cba919a0aa8c62e2f [2019-10-13 19:16:51,492 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-13 19:16:51,494 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-13 19:16:51,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-13 19:16:51,495 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-13 19:16:51,499 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-13 19:16:51,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:51" (1/1) ... [2019-10-13 19:16:51,505 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@47f467de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51, skipping insertion in model container [2019-10-13 19:16:51,505 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:16:51" (1/1) ... [2019-10-13 19:16:51,513 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-13 19:16:51,535 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-13 19:16:51,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:16:51,695 INFO L188 MainTranslator]: Completed pre-run [2019-10-13 19:16:51,722 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-13 19:16:51,739 INFO L192 MainTranslator]: Completed translation [2019-10-13 19:16:51,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51 WrapperNode [2019-10-13 19:16:51,740 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-13 19:16:51,741 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-13 19:16:51,741 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-13 19:16:51,741 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-13 19:16:51,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2019-10-13 19:16:51,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2019-10-13 19:16:51,843 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2019-10-13 19:16:51,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2019-10-13 19:16:51,848 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2019-10-13 19:16:51,850 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2019-10-13 19:16:51,850 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (1/1) ... [2019-10-13 19:16:51,852 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-13 19:16:51,852 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-13 19:16:51,852 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-13 19:16:51,852 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-13 19:16:51,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (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 [2019-10-13 19:16:51,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-13 19:16:51,916 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-13 19:16:51,916 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-13 19:16:51,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-13 19:16:51,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-13 19:16:51,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-13 19:16:51,916 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-13 19:16:51,917 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-13 19:16:51,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-13 19:16:51,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-13 19:16:52,090 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-13 19:16:52,090 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-13 19:16:52,091 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:52 BoogieIcfgContainer [2019-10-13 19:16:52,091 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-13 19:16:52,092 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-13 19:16:52,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-13 19:16:52,096 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-13 19:16:52,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:16:51" (1/3) ... [2019-10-13 19:16:52,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b28a9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:52, skipping insertion in model container [2019-10-13 19:16:52,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:16:51" (2/3) ... [2019-10-13 19:16:52,097 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b28a9ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:16:52, skipping insertion in model container [2019-10-13 19:16:52,098 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:16:52" (3/3) ... [2019-10-13 19:16:52,099 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i.p+cfa-reducer.c [2019-10-13 19:16:52,107 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-13 19:16:52,113 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-13 19:16:52,122 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-13 19:16:52,146 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-13 19:16:52,146 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-13 19:16:52,146 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-13 19:16:52,146 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-13 19:16:52,146 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-13 19:16:52,147 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-13 19:16:52,147 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-13 19:16:52,147 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-13 19:16:52,164 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states. [2019-10-13 19:16:52,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-10-13 19:16:52,170 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:52,171 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:52,173 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:52,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:52,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1277702393, now seen corresponding path program 1 times [2019-10-13 19:16:52,187 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:52,188 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690240571] [2019-10-13 19:16:52,188 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:52,188 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:52,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:52,259 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:52,260 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1618243861] [2019-10-13 19:16:52,260 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 [2019-10-13 19:16:52,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:52,311 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2019-10-13 19:16:52,317 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:52,489 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690240571] [2019-10-13 19:16:52,490 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:52,490 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618243861] [2019-10-13 19:16:52,491 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-13 19:16:52,491 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-13 19:16:52,491 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960381094] [2019-10-13 19:16:52,496 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-13 19:16:52,497 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:52,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-13 19:16:52,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:16:52,509 INFO L87 Difference]: Start difference. First operand 16 states. Second operand 4 states. [2019-10-13 19:16:52,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:52,559 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2019-10-13 19:16:52,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-13 19:16:52,561 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2019-10-13 19:16:52,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:52,572 INFO L225 Difference]: With dead ends: 26 [2019-10-13 19:16:52,573 INFO L226 Difference]: Without dead ends: 13 [2019-10-13 19:16:52,576 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-13 19:16:52,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-10-13 19:16:52,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-10-13 19:16:52,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-10-13 19:16:52,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-10-13 19:16:52,609 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2019-10-13 19:16:52,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:52,609 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-10-13 19:16:52,610 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-13 19:16:52,610 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-10-13 19:16:52,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-10-13 19:16:52,611 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:52,611 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:52,812 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:52,812 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:52,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:52,813 INFO L82 PathProgramCache]: Analyzing trace with hash -954130992, now seen corresponding path program 1 times [2019-10-13 19:16:52,814 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:52,823 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1110780671] [2019-10-13 19:16:52,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:52,823 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:52,823 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:52,838 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:52,838 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1681322390] [2019-10-13 19:16:52,838 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 [2019-10-13 19:16:52,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:52,875 INFO L256 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 15 conjunts are in the unsatisfiable core [2019-10-13 19:16:52,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:52,943 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:52,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:52,963 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1110780671] [2019-10-13 19:16:52,963 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:52,964 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681322390] [2019-10-13 19:16:52,964 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:52,964 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-13 19:16:52,964 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398774132] [2019-10-13 19:16:52,966 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:16:52,967 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:52,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:16:52,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:16:52,968 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 6 states. [2019-10-13 19:16:53,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:53,032 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-10-13 19:16:53,033 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:16:53,033 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2019-10-13 19:16:53,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:53,034 INFO L225 Difference]: With dead ends: 17 [2019-10-13 19:16:53,034 INFO L226 Difference]: Without dead ends: 14 [2019-10-13 19:16:53,035 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:16:53,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2019-10-13 19:16:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2019-10-13 19:16:53,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2019-10-13 19:16:53,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2019-10-13 19:16:53,040 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2019-10-13 19:16:53,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:53,040 INFO L462 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2019-10-13 19:16:53,041 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:16:53,041 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2019-10-13 19:16:53,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-10-13 19:16:53,041 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:53,042 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:53,247 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:53,248 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:53,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:53,249 INFO L82 PathProgramCache]: Analyzing trace with hash 486647847, now seen corresponding path program 2 times [2019-10-13 19:16:53,249 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:53,249 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344713174] [2019-10-13 19:16:53,250 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:53,250 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:53,250 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:53,265 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:53,265 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [987428541] [2019-10-13 19:16:53,266 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 [2019-10-13 19:16:53,298 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:16:53,298 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:53,300 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 19 conjunts are in the unsatisfiable core [2019-10-13 19:16:53,301 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:53,351 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:53,368 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:53,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344713174] [2019-10-13 19:16:53,369 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:53,369 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987428541] [2019-10-13 19:16:53,369 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:53,369 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2019-10-13 19:16:53,370 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224226879] [2019-10-13 19:16:53,370 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-13 19:16:53,370 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:53,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-13 19:16:53,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2019-10-13 19:16:53,371 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 6 states. [2019-10-13 19:16:53,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:53,424 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2019-10-13 19:16:53,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-13 19:16:53,425 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2019-10-13 19:16:53,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:53,426 INFO L225 Difference]: With dead ends: 18 [2019-10-13 19:16:53,426 INFO L226 Difference]: Without dead ends: 15 [2019-10-13 19:16:53,427 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:16:53,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-10-13 19:16:53,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-10-13 19:16:53,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-10-13 19:16:53,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-10-13 19:16:53,431 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2019-10-13 19:16:53,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:53,432 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-10-13 19:16:53,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-13 19:16:53,432 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-10-13 19:16:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-10-13 19:16:53,433 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:53,433 INFO L380 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:53,636 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:53,643 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:53,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:53,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2093848400, now seen corresponding path program 3 times [2019-10-13 19:16:53,643 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:53,644 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048883153] [2019-10-13 19:16:53,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:53,644 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:53,644 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:53,660 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:53,661 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1781888109] [2019-10-13 19:16:53,661 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 [2019-10-13 19:16:53,699 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-10-13 19:16:53,700 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:53,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 23 conjunts are in the unsatisfiable core [2019-10-13 19:16:53,704 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:53,772 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:53,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:53,790 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048883153] [2019-10-13 19:16:53,791 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:53,791 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781888109] [2019-10-13 19:16:53,792 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:53,792 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-10-13 19:16:53,792 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373274908] [2019-10-13 19:16:53,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-13 19:16:53,793 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:53,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-13 19:16:53,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2019-10-13 19:16:53,794 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 7 states. [2019-10-13 19:16:53,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:53,875 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-10-13 19:16:53,875 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-13 19:16:53,876 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2019-10-13 19:16:53,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:53,876 INFO L225 Difference]: With dead ends: 19 [2019-10-13 19:16:53,877 INFO L226 Difference]: Without dead ends: 16 [2019-10-13 19:16:53,877 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:16:53,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-10-13 19:16:53,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-10-13 19:16:53,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-10-13 19:16:53,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-10-13 19:16:53,882 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2019-10-13 19:16:53,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:53,882 INFO L462 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-10-13 19:16:53,882 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-13 19:16:53,882 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-10-13 19:16:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-10-13 19:16:53,883 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:53,883 INFO L380 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:54,084 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:54,084 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:54,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:54,085 INFO L82 PathProgramCache]: Analyzing trace with hash -484853433, now seen corresponding path program 4 times [2019-10-13 19:16:54,085 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:54,085 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197096518] [2019-10-13 19:16:54,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:54,085 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:54,085 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:54,105 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:54,105 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924864441] [2019-10-13 19:16:54,105 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 [2019-10-13 19:16:54,159 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:16:54,159 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:54,160 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 27 conjunts are in the unsatisfiable core [2019-10-13 19:16:54,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:54,224 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:54,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197096518] [2019-10-13 19:16:54,241 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:54,241 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924864441] [2019-10-13 19:16:54,241 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:54,241 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2019-10-13 19:16:54,242 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614191886] [2019-10-13 19:16:54,242 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-10-13 19:16:54,242 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:54,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-10-13 19:16:54,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2019-10-13 19:16:54,243 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 8 states. [2019-10-13 19:16:54,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:54,320 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2019-10-13 19:16:54,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-13 19:16:54,320 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2019-10-13 19:16:54,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:54,321 INFO L225 Difference]: With dead ends: 20 [2019-10-13 19:16:54,321 INFO L226 Difference]: Without dead ends: 17 [2019-10-13 19:16:54,322 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:16:54,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-10-13 19:16:54,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-10-13 19:16:54,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-10-13 19:16:54,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-10-13 19:16:54,328 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2019-10-13 19:16:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:54,331 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-10-13 19:16:54,331 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-10-13 19:16:54,331 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-10-13 19:16:54,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-10-13 19:16:54,340 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:54,340 INFO L380 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:54,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:54,542 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:54,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:54,542 INFO L82 PathProgramCache]: Analyzing trace with hash -2145617008, now seen corresponding path program 5 times [2019-10-13 19:16:54,542 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:54,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417720977] [2019-10-13 19:16:54,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:54,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:54,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:54,560 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:54,560 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [995201900] [2019-10-13 19:16:54,560 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 [2019-10-13 19:16:54,597 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-10-13 19:16:54,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:54,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-13 19:16:54,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:54,687 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:54,707 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:54,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417720977] [2019-10-13 19:16:54,708 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:54,708 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995201900] [2019-10-13 19:16:54,708 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:54,709 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-10-13 19:16:54,709 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804952791] [2019-10-13 19:16:54,709 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-10-13 19:16:54,709 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:54,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-10-13 19:16:54,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2019-10-13 19:16:54,711 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 9 states. [2019-10-13 19:16:54,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:54,790 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-10-13 19:16:54,791 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-10-13 19:16:54,791 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 16 [2019-10-13 19:16:54,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:54,792 INFO L225 Difference]: With dead ends: 21 [2019-10-13 19:16:54,792 INFO L226 Difference]: Without dead ends: 18 [2019-10-13 19:16:54,793 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 [2019-10-13 19:16:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-10-13 19:16:54,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-10-13 19:16:54,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-10-13 19:16:54,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-10-13 19:16:54,797 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2019-10-13 19:16:54,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:54,798 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-10-13 19:16:54,798 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-10-13 19:16:54,798 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-10-13 19:16:54,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-10-13 19:16:54,799 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:54,799 INFO L380 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:55,007 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:55,008 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:55,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:55,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2089680281, now seen corresponding path program 6 times [2019-10-13 19:16:55,009 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:55,010 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168036008] [2019-10-13 19:16:55,010 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:55,010 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:55,010 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:55,028 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:55,028 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184868346] [2019-10-13 19:16:55,029 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 [2019-10-13 19:16:55,057 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-10-13 19:16:55,058 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:55,062 WARN L254 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-13 19:16:55,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:55,154 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:55,174 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:55,174 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168036008] [2019-10-13 19:16:55,174 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:55,174 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184868346] [2019-10-13 19:16:55,175 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:55,175 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2019-10-13 19:16:55,175 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252902019] [2019-10-13 19:16:55,175 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-13 19:16:55,176 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:55,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-13 19:16:55,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2019-10-13 19:16:55,176 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand 10 states. [2019-10-13 19:16:55,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:55,258 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2019-10-13 19:16:55,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-13 19:16:55,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 17 [2019-10-13 19:16:55,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:55,259 INFO L225 Difference]: With dead ends: 22 [2019-10-13 19:16:55,260 INFO L226 Difference]: Without dead ends: 19 [2019-10-13 19:16:55,261 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 [2019-10-13 19:16:55,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-10-13 19:16:55,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-10-13 19:16:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-10-13 19:16:55,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-10-13 19:16:55,265 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2019-10-13 19:16:55,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:55,265 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-10-13 19:16:55,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-13 19:16:55,266 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-10-13 19:16:55,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-10-13 19:16:55,266 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:55,266 INFO L380 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:55,477 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:55,477 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:55,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:55,478 INFO L82 PathProgramCache]: Analyzing trace with hash -355641744, now seen corresponding path program 7 times [2019-10-13 19:16:55,479 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:55,479 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037880610] [2019-10-13 19:16:55,479 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:55,479 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:55,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:55,494 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:55,495 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1042871674] [2019-10-13 19:16:55,495 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 [2019-10-13 19:16:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:55,528 WARN L254 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 39 conjunts are in the unsatisfiable core [2019-10-13 19:16:55,529 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:55,636 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:55,658 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:55,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037880610] [2019-10-13 19:16:55,659 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:55,659 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042871674] [2019-10-13 19:16:55,659 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:55,659 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-10-13 19:16:55,660 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814709802] [2019-10-13 19:16:55,660 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-13 19:16:55,660 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:55,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-13 19:16:55,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2019-10-13 19:16:55,661 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 11 states. [2019-10-13 19:16:55,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:55,760 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-10-13 19:16:55,761 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-10-13 19:16:55,761 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 18 [2019-10-13 19:16:55,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:55,762 INFO L225 Difference]: With dead ends: 23 [2019-10-13 19:16:55,762 INFO L226 Difference]: Without dead ends: 20 [2019-10-13 19:16:55,763 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:16:55,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-10-13 19:16:55,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-10-13 19:16:55,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-10-13 19:16:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2019-10-13 19:16:55,767 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2019-10-13 19:16:55,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:55,768 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2019-10-13 19:16:55,768 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-10-13 19:16:55,768 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2019-10-13 19:16:55,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-10-13 19:16:55,769 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:55,769 INFO L380 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:55,976 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:55,977 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:55,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:55,978 INFO L82 PathProgramCache]: Analyzing trace with hash 1859945351, now seen corresponding path program 8 times [2019-10-13 19:16:55,978 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:55,979 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251406610] [2019-10-13 19:16:55,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:55,979 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:55,979 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:55,998 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:55,998 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [600943742] [2019-10-13 19:16:55,999 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 [2019-10-13 19:16:56,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:16:56,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:56,041 WARN L254 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 43 conjunts are in the unsatisfiable core [2019-10-13 19:16:56,042 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:56,162 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:56,179 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:56,179 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251406610] [2019-10-13 19:16:56,179 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:56,180 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600943742] [2019-10-13 19:16:56,180 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:56,180 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2019-10-13 19:16:56,181 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381454274] [2019-10-13 19:16:56,181 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-10-13 19:16:56,182 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:56,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-10-13 19:16:56,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2019-10-13 19:16:56,182 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 12 states. [2019-10-13 19:16:56,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:56,386 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2019-10-13 19:16:56,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-10-13 19:16:56,387 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2019-10-13 19:16:56,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:56,388 INFO L225 Difference]: With dead ends: 24 [2019-10-13 19:16:56,388 INFO L226 Difference]: Without dead ends: 21 [2019-10-13 19:16:56,389 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 [2019-10-13 19:16:56,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-10-13 19:16:56,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-10-13 19:16:56,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-10-13 19:16:56,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-10-13 19:16:56,393 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2019-10-13 19:16:56,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:56,394 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-10-13 19:16:56,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-10-13 19:16:56,394 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-10-13 19:16:56,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-10-13 19:16:56,395 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:56,395 INFO L380 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:56,598 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:56,599 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:56,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:56,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1823668560, now seen corresponding path program 9 times [2019-10-13 19:16:56,600 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:56,600 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452588450] [2019-10-13 19:16:56,601 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:56,601 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:56,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:56,611 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:56,611 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [33630902] [2019-10-13 19:16:56,611 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 [2019-10-13 19:16:56,648 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-10-13 19:16:56,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:56,650 WARN L254 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 47 conjunts are in the unsatisfiable core [2019-10-13 19:16:56,652 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:56,773 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:56,791 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:56,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452588450] [2019-10-13 19:16:56,792 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:56,792 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33630902] [2019-10-13 19:16:56,792 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:56,793 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-10-13 19:16:56,793 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853114730] [2019-10-13 19:16:56,793 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-13 19:16:56,793 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:56,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-13 19:16:56,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2019-10-13 19:16:56,794 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 13 states. [2019-10-13 19:16:56,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:56,977 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-10-13 19:16:56,978 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-13 19:16:56,978 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 20 [2019-10-13 19:16:56,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:56,979 INFO L225 Difference]: With dead ends: 25 [2019-10-13 19:16:56,979 INFO L226 Difference]: Without dead ends: 22 [2019-10-13 19:16:56,980 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 [2019-10-13 19:16:56,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-10-13 19:16:56,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2019-10-13 19:16:56,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-10-13 19:16:56,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2019-10-13 19:16:56,984 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2019-10-13 19:16:56,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:56,985 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2019-10-13 19:16:56,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-13 19:16:56,985 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2019-10-13 19:16:56,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-10-13 19:16:56,986 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:56,986 INFO L380 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:57,194 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:57,195 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:57,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:57,195 INFO L82 PathProgramCache]: Analyzing trace with hash 699088039, now seen corresponding path program 10 times [2019-10-13 19:16:57,196 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:57,196 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895558489] [2019-10-13 19:16:57,196 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:57,196 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:57,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:57,207 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:57,208 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273137962] [2019-10-13 19:16:57,208 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 [2019-10-13 19:16:57,296 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:16:57,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:57,298 WARN L254 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 51 conjunts are in the unsatisfiable core [2019-10-13 19:16:57,299 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:57,452 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:57,472 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:57,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895558489] [2019-10-13 19:16:57,473 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:57,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273137962] [2019-10-13 19:16:57,473 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:57,473 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2019-10-13 19:16:57,473 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944621131] [2019-10-13 19:16:57,474 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-10-13 19:16:57,474 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:57,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-10-13 19:16:57,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2019-10-13 19:16:57,475 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 14 states. [2019-10-13 19:16:57,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:57,629 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2019-10-13 19:16:57,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-10-13 19:16:57,634 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 21 [2019-10-13 19:16:57,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:57,635 INFO L225 Difference]: With dead ends: 26 [2019-10-13 19:16:57,635 INFO L226 Difference]: Without dead ends: 23 [2019-10-13 19:16:57,636 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 [2019-10-13 19:16:57,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-10-13 19:16:57,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-10-13 19:16:57,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-10-13 19:16:57,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-10-13 19:16:57,642 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2019-10-13 19:16:57,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:57,643 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-10-13 19:16:57,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-10-13 19:16:57,643 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-10-13 19:16:57,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-10-13 19:16:57,643 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:57,643 INFO L380 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:57,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:57,847 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:57,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:57,848 INFO L82 PathProgramCache]: Analyzing trace with hash 196830256, now seen corresponding path program 11 times [2019-10-13 19:16:57,848 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:57,849 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907929971] [2019-10-13 19:16:57,849 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:57,849 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:57,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:57,859 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:57,860 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933888817] [2019-10-13 19:16:57,860 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 [2019-10-13 19:16:57,906 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-10-13 19:16:57,907 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:57,908 WARN L254 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 55 conjunts are in the unsatisfiable core [2019-10-13 19:16:57,910 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:58,082 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:58,133 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907929971] [2019-10-13 19:16:58,133 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:58,134 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933888817] [2019-10-13 19:16:58,134 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:58,134 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-10-13 19:16:58,134 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864060287] [2019-10-13 19:16:58,134 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-13 19:16:58,135 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:58,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-13 19:16:58,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2019-10-13 19:16:58,135 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 15 states. [2019-10-13 19:16:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:58,290 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-10-13 19:16:58,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-13 19:16:58,291 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 22 [2019-10-13 19:16:58,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:58,292 INFO L225 Difference]: With dead ends: 27 [2019-10-13 19:16:58,292 INFO L226 Difference]: Without dead ends: 24 [2019-10-13 19:16:58,292 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:16:58,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-10-13 19:16:58,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2019-10-13 19:16:58,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-10-13 19:16:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2019-10-13 19:16:58,297 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2019-10-13 19:16:58,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:58,297 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2019-10-13 19:16:58,297 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-13 19:16:58,298 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2019-10-13 19:16:58,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-10-13 19:16:58,298 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:58,298 INFO L380 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:58,502 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:58,503 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:58,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:58,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1806708167, now seen corresponding path program 12 times [2019-10-13 19:16:58,503 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:58,504 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451034876] [2019-10-13 19:16:58,504 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:58,504 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:58,504 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:58,515 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:58,515 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892333545] [2019-10-13 19:16:58,515 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 [2019-10-13 19:16:58,555 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-10-13 19:16:58,555 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:16:58,556 WARN L254 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 59 conjunts are in the unsatisfiable core [2019-10-13 19:16:58,558 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:58,727 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:58,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451034876] [2019-10-13 19:16:58,746 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:58,746 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892333545] [2019-10-13 19:16:58,746 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:58,747 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2019-10-13 19:16:58,747 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912553286] [2019-10-13 19:16:58,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-10-13 19:16:58,747 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:58,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-10-13 19:16:58,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2019-10-13 19:16:58,748 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 16 states. [2019-10-13 19:16:58,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:58,934 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2019-10-13 19:16:58,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-10-13 19:16:58,935 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 23 [2019-10-13 19:16:58,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:58,935 INFO L225 Difference]: With dead ends: 28 [2019-10-13 19:16:58,936 INFO L226 Difference]: Without dead ends: 25 [2019-10-13 19:16:58,936 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:16:58,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-10-13 19:16:58,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-10-13 19:16:58,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-10-13 19:16:58,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-10-13 19:16:58,941 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2019-10-13 19:16:58,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:58,942 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-10-13 19:16:58,942 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-10-13 19:16:58,942 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-10-13 19:16:58,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-10-13 19:16:58,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:58,943 INFO L380 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:59,146 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:59,147 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:59,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:59,148 INFO L82 PathProgramCache]: Analyzing trace with hash 173315856, now seen corresponding path program 13 times [2019-10-13 19:16:59,148 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:59,148 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591137625] [2019-10-13 19:16:59,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:59,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:59,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:59,160 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:59,160 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035560810] [2019-10-13 19:16:59,160 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 [2019-10-13 19:16:59,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:16:59,205 WARN L254 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 63 conjunts are in the unsatisfiable core [2019-10-13 19:16:59,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:16:59,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:16:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:16:59,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591137625] [2019-10-13 19:16:59,484 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:16:59,484 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035560810] [2019-10-13 19:16:59,485 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:16:59,485 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-10-13 19:16:59,485 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926784606] [2019-10-13 19:16:59,485 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-13 19:16:59,486 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:16:59,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-13 19:16:59,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2019-10-13 19:16:59,487 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 17 states. [2019-10-13 19:16:59,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:16:59,716 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-10-13 19:16:59,716 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-13 19:16:59,717 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 24 [2019-10-13 19:16:59,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:16:59,718 INFO L225 Difference]: With dead ends: 29 [2019-10-13 19:16:59,718 INFO L226 Difference]: Without dead ends: 26 [2019-10-13 19:16:59,718 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 [2019-10-13 19:16:59,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-10-13 19:16:59,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-10-13 19:16:59,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-10-13 19:16:59,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2019-10-13 19:16:59,723 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2019-10-13 19:16:59,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:16:59,723 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2019-10-13 19:16:59,723 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-13 19:16:59,724 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2019-10-13 19:16:59,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-10-13 19:16:59,724 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:16:59,725 INFO L380 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:16:59,929 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:16:59,929 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:16:59,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:16:59,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1077761767, now seen corresponding path program 14 times [2019-10-13 19:16:59,930 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:16:59,930 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167067830] [2019-10-13 19:16:59,931 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:59,931 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:16:59,931 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:16:59,941 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:16:59,942 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1402439706] [2019-10-13 19:16:59,942 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 [2019-10-13 19:17:00,003 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:00,004 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:00,005 WARN L254 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 67 conjunts are in the unsatisfiable core [2019-10-13 19:17:00,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:00,255 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:00,282 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167067830] [2019-10-13 19:17:00,282 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:00,283 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402439706] [2019-10-13 19:17:00,283 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:00,283 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2019-10-13 19:17:00,283 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698246846] [2019-10-13 19:17:00,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-10-13 19:17:00,284 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:00,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-10-13 19:17:00,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2019-10-13 19:17:00,286 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand 18 states. [2019-10-13 19:17:00,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:00,509 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2019-10-13 19:17:00,509 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-10-13 19:17:00,509 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 25 [2019-10-13 19:17:00,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:00,510 INFO L225 Difference]: With dead ends: 30 [2019-10-13 19:17:00,511 INFO L226 Difference]: Without dead ends: 27 [2019-10-13 19:17:00,511 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 [2019-10-13 19:17:00,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-10-13 19:17:00,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-10-13 19:17:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-10-13 19:17:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-10-13 19:17:00,516 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2019-10-13 19:17:00,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:00,516 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-10-13 19:17:00,516 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-10-13 19:17:00,516 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-10-13 19:17:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-10-13 19:17:00,517 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:00,517 INFO L380 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:00,720 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:00,721 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:00,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:00,722 INFO L82 PathProgramCache]: Analyzing trace with hash -949186064, now seen corresponding path program 15 times [2019-10-13 19:17:00,722 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:00,722 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717709745] [2019-10-13 19:17:00,723 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:00,723 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:00,723 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:00,733 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:00,734 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1645244117] [2019-10-13 19:17:00,734 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 [2019-10-13 19:17:00,806 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-10-13 19:17:00,806 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:00,808 WARN L254 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 71 conjunts are in the unsatisfiable core [2019-10-13 19:17:00,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:01,050 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:01,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717709745] [2019-10-13 19:17:01,073 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:01,073 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645244117] [2019-10-13 19:17:01,073 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:01,073 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-10-13 19:17:01,073 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123340922] [2019-10-13 19:17:01,074 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-10-13 19:17:01,074 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:01,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-10-13 19:17:01,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2019-10-13 19:17:01,075 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 19 states. [2019-10-13 19:17:01,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:01,335 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-10-13 19:17:01,337 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-10-13 19:17:01,337 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 26 [2019-10-13 19:17:01,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:01,338 INFO L225 Difference]: With dead ends: 31 [2019-10-13 19:17:01,338 INFO L226 Difference]: Without dead ends: 28 [2019-10-13 19:17:01,339 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 [2019-10-13 19:17:01,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-10-13 19:17:01,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-10-13 19:17:01,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-10-13 19:17:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2019-10-13 19:17:01,343 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2019-10-13 19:17:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:01,344 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2019-10-13 19:17:01,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-10-13 19:17:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2019-10-13 19:17:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-13 19:17:01,345 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:01,345 INFO L380 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:01,552 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:01,553 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:01,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:01,553 INFO L82 PathProgramCache]: Analyzing trace with hash 639940615, now seen corresponding path program 16 times [2019-10-13 19:17:01,554 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:01,554 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618031737] [2019-10-13 19:17:01,554 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:01,554 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:01,555 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:01,572 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:01,573 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057792834] [2019-10-13 19:17:01,573 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 [2019-10-13 19:17:01,723 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:17:01,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:01,725 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 75 conjunts are in the unsatisfiable core [2019-10-13 19:17:01,726 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:01,964 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:01,993 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618031737] [2019-10-13 19:17:01,993 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:01,994 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057792834] [2019-10-13 19:17:01,994 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:01,994 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2019-10-13 19:17:01,994 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181399871] [2019-10-13 19:17:01,995 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-10-13 19:17:01,995 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:01,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-10-13 19:17:01,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2019-10-13 19:17:01,995 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 20 states. [2019-10-13 19:17:02,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:02,277 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2019-10-13 19:17:02,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-13 19:17:02,277 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 27 [2019-10-13 19:17:02,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:02,278 INFO L225 Difference]: With dead ends: 32 [2019-10-13 19:17:02,278 INFO L226 Difference]: Without dead ends: 29 [2019-10-13 19:17:02,279 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 [2019-10-13 19:17:02,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-10-13 19:17:02,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-10-13 19:17:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-10-13 19:17:02,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-10-13 19:17:02,285 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2019-10-13 19:17:02,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:02,286 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-10-13 19:17:02,286 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-10-13 19:17:02,286 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-10-13 19:17:02,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-10-13 19:17:02,286 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:02,287 INFO L380 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:02,490 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:02,490 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:02,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:02,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1636739888, now seen corresponding path program 17 times [2019-10-13 19:17:02,491 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:02,491 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761316148] [2019-10-13 19:17:02,491 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:02,491 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:02,492 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:02,501 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:02,502 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969059078] [2019-10-13 19:17:02,502 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 [2019-10-13 19:17:02,560 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2019-10-13 19:17:02,560 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:02,562 WARN L254 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 79 conjunts are in the unsatisfiable core [2019-10-13 19:17:02,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:02,814 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:02,834 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:02,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761316148] [2019-10-13 19:17:02,835 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:02,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969059078] [2019-10-13 19:17:02,835 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:02,835 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-10-13 19:17:02,835 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918127904] [2019-10-13 19:17:02,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-13 19:17:02,836 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:02,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-13 19:17:02,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2019-10-13 19:17:02,837 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 21 states. [2019-10-13 19:17:03,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:03,189 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-10-13 19:17:03,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-13 19:17:03,189 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 28 [2019-10-13 19:17:03,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:03,190 INFO L225 Difference]: With dead ends: 33 [2019-10-13 19:17:03,190 INFO L226 Difference]: Without dead ends: 30 [2019-10-13 19:17:03,191 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2019-10-13 19:17:03,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-10-13 19:17:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2019-10-13 19:17:03,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-10-13 19:17:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2019-10-13 19:17:03,197 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2019-10-13 19:17:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:03,197 INFO L462 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2019-10-13 19:17:03,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-13 19:17:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2019-10-13 19:17:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-13 19:17:03,198 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:03,198 INFO L380 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:03,401 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:03,402 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:03,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:03,402 INFO L82 PathProgramCache]: Analyzing trace with hash 800608551, now seen corresponding path program 18 times [2019-10-13 19:17:03,403 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:03,403 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985465599] [2019-10-13 19:17:03,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:03,403 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:03,404 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:03,422 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:03,422 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992167306] [2019-10-13 19:17:03,422 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 [2019-10-13 19:17:03,492 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2019-10-13 19:17:03,493 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:03,494 WARN L254 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 83 conjunts are in the unsatisfiable core [2019-10-13 19:17:03,495 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:03,759 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:03,780 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:03,780 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985465599] [2019-10-13 19:17:03,780 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:03,781 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992167306] [2019-10-13 19:17:03,781 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:03,781 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2019-10-13 19:17:03,781 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824206526] [2019-10-13 19:17:03,781 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-13 19:17:03,782 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:03,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-13 19:17:03,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2019-10-13 19:17:03,782 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand 22 states. [2019-10-13 19:17:04,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:04,090 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2019-10-13 19:17:04,090 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-13 19:17:04,090 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 29 [2019-10-13 19:17:04,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:04,091 INFO L225 Difference]: With dead ends: 34 [2019-10-13 19:17:04,091 INFO L226 Difference]: Without dead ends: 31 [2019-10-13 19:17:04,092 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 [2019-10-13 19:17:04,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-10-13 19:17:04,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-10-13 19:17:04,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-10-13 19:17:04,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-10-13 19:17:04,097 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2019-10-13 19:17:04,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:04,098 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-10-13 19:17:04,098 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-13 19:17:04,098 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-10-13 19:17:04,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-10-13 19:17:04,098 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:04,099 INFO L380 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:04,302 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:04,302 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:04,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:04,303 INFO L82 PathProgramCache]: Analyzing trace with hash -951001168, now seen corresponding path program 19 times [2019-10-13 19:17:04,303 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:04,303 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427969775] [2019-10-13 19:17:04,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:04,304 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:04,304 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:04,315 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:04,315 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [160417765] [2019-10-13 19:17:04,315 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 [2019-10-13 19:17:04,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:04,379 WARN L254 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 87 conjunts are in the unsatisfiable core [2019-10-13 19:17:04,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:04,725 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:04,765 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427969775] [2019-10-13 19:17:04,766 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:04,766 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160417765] [2019-10-13 19:17:04,766 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:04,766 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-10-13 19:17:04,766 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049994390] [2019-10-13 19:17:04,766 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-10-13 19:17:04,767 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:04,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-10-13 19:17:04,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2019-10-13 19:17:04,767 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 23 states. [2019-10-13 19:17:05,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:05,165 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-10-13 19:17:05,166 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-10-13 19:17:05,166 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 30 [2019-10-13 19:17:05,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:05,167 INFO L225 Difference]: With dead ends: 35 [2019-10-13 19:17:05,167 INFO L226 Difference]: Without dead ends: 32 [2019-10-13 19:17:05,167 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 [2019-10-13 19:17:05,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-10-13 19:17:05,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2019-10-13 19:17:05,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-10-13 19:17:05,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2019-10-13 19:17:05,173 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2019-10-13 19:17:05,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:05,173 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2019-10-13 19:17:05,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-10-13 19:17:05,174 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2019-10-13 19:17:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-13 19:17:05,174 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:05,174 INFO L380 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:05,385 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:05,385 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:05,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:05,385 INFO L82 PathProgramCache]: Analyzing trace with hash 583672391, now seen corresponding path program 20 times [2019-10-13 19:17:05,386 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:05,386 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573719335] [2019-10-13 19:17:05,386 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:05,386 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:05,386 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:05,403 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:05,404 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1167382921] [2019-10-13 19:17:05,404 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 [2019-10-13 19:17:05,492 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:05,492 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:05,494 WARN L254 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 91 conjunts are in the unsatisfiable core [2019-10-13 19:17:05,496 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:05,810 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:05,834 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:05,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573719335] [2019-10-13 19:17:05,835 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:05,835 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167382921] [2019-10-13 19:17:05,835 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:05,835 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2019-10-13 19:17:05,835 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548076162] [2019-10-13 19:17:05,836 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-10-13 19:17:05,836 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:05,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-10-13 19:17:05,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2019-10-13 19:17:05,836 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 24 states. [2019-10-13 19:17:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:06,212 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2019-10-13 19:17:06,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-10-13 19:17:06,212 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 31 [2019-10-13 19:17:06,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:06,213 INFO L225 Difference]: With dead ends: 36 [2019-10-13 19:17:06,213 INFO L226 Difference]: Without dead ends: 33 [2019-10-13 19:17:06,213 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=551, Unknown=0, NotChecked=0, Total=600 [2019-10-13 19:17:06,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-13 19:17:06,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-13 19:17:06,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-13 19:17:06,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-10-13 19:17:06,217 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2019-10-13 19:17:06,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:06,218 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-10-13 19:17:06,218 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-10-13 19:17:06,218 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-10-13 19:17:06,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-10-13 19:17:06,218 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:06,219 INFO L380 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:06,424 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:06,424 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:06,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:06,425 INFO L82 PathProgramCache]: Analyzing trace with hash 913912464, now seen corresponding path program 21 times [2019-10-13 19:17:06,425 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:06,425 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646627290] [2019-10-13 19:17:06,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:06,426 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:06,426 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:06,441 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:06,441 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768239610] [2019-10-13 19:17:06,441 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 [2019-10-13 19:17:06,649 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-10-13 19:17:06,649 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:06,651 WARN L254 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 95 conjunts are in the unsatisfiable core [2019-10-13 19:17:06,654 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:07,006 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:07,032 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:07,032 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646627290] [2019-10-13 19:17:07,032 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:07,033 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768239610] [2019-10-13 19:17:07,033 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:07,033 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-10-13 19:17:07,033 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698225562] [2019-10-13 19:17:07,033 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-10-13 19:17:07,033 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:07,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-10-13 19:17:07,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2019-10-13 19:17:07,034 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 25 states. [2019-10-13 19:17:07,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:07,470 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-10-13 19:17:07,472 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-10-13 19:17:07,473 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 32 [2019-10-13 19:17:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:07,473 INFO L225 Difference]: With dead ends: 37 [2019-10-13 19:17:07,474 INFO L226 Difference]: Without dead ends: 34 [2019-10-13 19:17:07,474 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 [2019-10-13 19:17:07,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-10-13 19:17:07,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2019-10-13 19:17:07,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-10-13 19:17:07,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2019-10-13 19:17:07,479 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2019-10-13 19:17:07,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:07,480 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2019-10-13 19:17:07,480 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-10-13 19:17:07,480 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2019-10-13 19:17:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-10-13 19:17:07,480 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:07,480 INFO L380 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:07,683 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:07,684 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:07,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:07,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1733547161, now seen corresponding path program 22 times [2019-10-13 19:17:07,685 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:07,685 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136672697] [2019-10-13 19:17:07,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:07,685 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:07,686 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:07,694 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:07,695 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1978244429] [2019-10-13 19:17:07,695 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 [2019-10-13 19:17:07,908 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:17:07,908 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:07,910 WARN L254 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 99 conjunts are in the unsatisfiable core [2019-10-13 19:17:07,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:08,276 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:08,301 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136672697] [2019-10-13 19:17:08,301 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:08,302 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978244429] [2019-10-13 19:17:08,302 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:08,302 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2019-10-13 19:17:08,302 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865901926] [2019-10-13 19:17:08,303 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-10-13 19:17:08,303 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:08,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-10-13 19:17:08,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2019-10-13 19:17:08,303 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand 26 states. [2019-10-13 19:17:08,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:08,742 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2019-10-13 19:17:08,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-10-13 19:17:08,743 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 33 [2019-10-13 19:17:08,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:08,744 INFO L225 Difference]: With dead ends: 38 [2019-10-13 19:17:08,744 INFO L226 Difference]: Without dead ends: 35 [2019-10-13 19:17:08,745 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2019-10-13 19:17:08,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-10-13 19:17:08,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-10-13 19:17:08,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-10-13 19:17:08,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-10-13 19:17:08,751 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2019-10-13 19:17:08,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:08,755 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-10-13 19:17:08,755 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-10-13 19:17:08,755 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-10-13 19:17:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-10-13 19:17:08,755 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:08,755 INFO L380 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:08,956 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:08,956 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:08,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:08,957 INFO L82 PathProgramCache]: Analyzing trace with hash 2094550384, now seen corresponding path program 23 times [2019-10-13 19:17:08,957 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:08,958 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773878083] [2019-10-13 19:17:08,958 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:08,958 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:08,958 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:08,969 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:08,970 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1170110617] [2019-10-13 19:17:08,970 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 [2019-10-13 19:17:09,032 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-13 19:17:09,032 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:09,034 WARN L254 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 103 conjunts are in the unsatisfiable core [2019-10-13 19:17:09,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:09,439 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:09,463 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:09,463 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773878083] [2019-10-13 19:17:09,464 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:09,464 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170110617] [2019-10-13 19:17:09,464 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:09,464 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-10-13 19:17:09,464 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711047195] [2019-10-13 19:17:09,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-10-13 19:17:09,465 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:09,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-10-13 19:17:09,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2019-10-13 19:17:09,466 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 27 states. [2019-10-13 19:17:09,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:09,981 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-10-13 19:17:09,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-10-13 19:17:09,982 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 34 [2019-10-13 19:17:09,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:09,983 INFO L225 Difference]: With dead ends: 39 [2019-10-13 19:17:09,983 INFO L226 Difference]: Without dead ends: 36 [2019-10-13 19:17:09,984 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 [2019-10-13 19:17:09,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-10-13 19:17:09,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2019-10-13 19:17:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-10-13 19:17:09,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2019-10-13 19:17:09,989 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2019-10-13 19:17:09,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:09,989 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2019-10-13 19:17:09,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-10-13 19:17:09,989 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2019-10-13 19:17:09,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-13 19:17:09,990 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:09,990 INFO L380 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:10,190 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:10,191 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:10,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:10,192 INFO L82 PathProgramCache]: Analyzing trace with hash 506489991, now seen corresponding path program 24 times [2019-10-13 19:17:10,192 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:10,192 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512895748] [2019-10-13 19:17:10,192 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:10,193 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:10,193 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:10,201 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:10,202 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613011618] [2019-10-13 19:17:10,202 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 [2019-10-13 19:17:10,301 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-10-13 19:17:10,301 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:10,304 WARN L254 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 107 conjunts are in the unsatisfiable core [2019-10-13 19:17:10,305 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:10,732 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:10,760 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:10,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512895748] [2019-10-13 19:17:10,761 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:10,761 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613011618] [2019-10-13 19:17:10,761 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:10,761 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2019-10-13 19:17:10,761 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528389817] [2019-10-13 19:17:10,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-10-13 19:17:10,762 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:10,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-10-13 19:17:10,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2019-10-13 19:17:10,763 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 28 states. [2019-10-13 19:17:11,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:11,330 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2019-10-13 19:17:11,330 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-10-13 19:17:11,330 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 35 [2019-10-13 19:17:11,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:11,331 INFO L225 Difference]: With dead ends: 40 [2019-10-13 19:17:11,331 INFO L226 Difference]: Without dead ends: 37 [2019-10-13 19:17:11,332 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 [2019-10-13 19:17:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-13 19:17:11,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-13 19:17:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-13 19:17:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-10-13 19:17:11,337 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2019-10-13 19:17:11,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:11,337 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-10-13 19:17:11,337 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-10-13 19:17:11,337 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-10-13 19:17:11,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-13 19:17:11,338 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:11,338 INFO L380 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:11,541 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:11,541 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:11,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:11,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1478741936, now seen corresponding path program 25 times [2019-10-13 19:17:11,542 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:11,542 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880488545] [2019-10-13 19:17:11,542 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:11,543 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:11,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:11,551 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:11,551 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [214150422] [2019-10-13 19:17:11,552 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 [2019-10-13 19:17:11,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:11,621 WARN L254 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 111 conjunts are in the unsatisfiable core [2019-10-13 19:17:11,622 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:12,048 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:12,078 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880488545] [2019-10-13 19:17:12,078 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:12,079 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214150422] [2019-10-13 19:17:12,079 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:12,079 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-10-13 19:17:12,079 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237809878] [2019-10-13 19:17:12,079 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-10-13 19:17:12,080 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:12,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-10-13 19:17:12,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2019-10-13 19:17:12,080 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 29 states. [2019-10-13 19:17:12,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:12,676 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-10-13 19:17:12,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-10-13 19:17:12,677 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 36 [2019-10-13 19:17:12,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:12,677 INFO L225 Difference]: With dead ends: 41 [2019-10-13 19:17:12,678 INFO L226 Difference]: Without dead ends: 38 [2019-10-13 19:17:12,679 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 [2019-10-13 19:17:12,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2019-10-13 19:17:12,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2019-10-13 19:17:12,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-10-13 19:17:12,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2019-10-13 19:17:12,685 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2019-10-13 19:17:12,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:12,686 INFO L462 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2019-10-13 19:17:12,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-10-13 19:17:12,686 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2019-10-13 19:17:12,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-13 19:17:12,686 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:12,686 INFO L380 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:12,889 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:12,890 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:12,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:12,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1403577767, now seen corresponding path program 26 times [2019-10-13 19:17:12,891 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:12,891 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603579330] [2019-10-13 19:17:12,891 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:12,891 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:12,892 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:12,900 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:12,901 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568248366] [2019-10-13 19:17:12,901 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 [2019-10-13 19:17:12,990 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:12,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:12,994 WARN L254 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 115 conjunts are in the unsatisfiable core [2019-10-13 19:17:12,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:13,457 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:13,486 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:13,486 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603579330] [2019-10-13 19:17:13,487 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:13,487 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568248366] [2019-10-13 19:17:13,487 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:13,487 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2019-10-13 19:17:13,487 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648519953] [2019-10-13 19:17:13,487 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-10-13 19:17:13,487 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:13,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-10-13 19:17:13,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2019-10-13 19:17:13,488 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand 30 states. [2019-10-13 19:17:14,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:14,112 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2019-10-13 19:17:14,113 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-10-13 19:17:14,113 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 37 [2019-10-13 19:17:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:14,114 INFO L225 Difference]: With dead ends: 42 [2019-10-13 19:17:14,114 INFO L226 Difference]: Without dead ends: 39 [2019-10-13 19:17:14,115 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 [2019-10-13 19:17:14,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-10-13 19:17:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-10-13 19:17:14,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-10-13 19:17:14,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-10-13 19:17:14,118 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2019-10-13 19:17:14,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:14,119 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-10-13 19:17:14,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-10-13 19:17:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-10-13 19:17:14,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-10-13 19:17:14,119 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:14,119 INFO L380 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:14,320 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:14,320 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:14,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:14,321 INFO L82 PathProgramCache]: Analyzing trace with hash 561175344, now seen corresponding path program 27 times [2019-10-13 19:17:14,321 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:14,321 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137459423] [2019-10-13 19:17:14,321 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:14,322 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:14,322 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:14,330 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:14,331 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [226689842] [2019-10-13 19:17:14,331 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 [2019-10-13 19:17:14,936 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2019-10-13 19:17:14,936 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:14,939 WARN L254 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 119 conjunts are in the unsatisfiable core [2019-10-13 19:17:14,941 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:15,437 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:15,467 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:15,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137459423] [2019-10-13 19:17:15,467 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:15,467 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226689842] [2019-10-13 19:17:15,467 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:15,467 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-10-13 19:17:15,468 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431863967] [2019-10-13 19:17:15,468 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-13 19:17:15,468 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:15,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-13 19:17:15,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2019-10-13 19:17:15,469 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 31 states. [2019-10-13 19:17:16,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:16,147 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-10-13 19:17:16,147 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-13 19:17:16,147 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 38 [2019-10-13 19:17:16,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:16,148 INFO L225 Difference]: With dead ends: 43 [2019-10-13 19:17:16,148 INFO L226 Difference]: Without dead ends: 40 [2019-10-13 19:17:16,149 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 [2019-10-13 19:17:16,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-10-13 19:17:16,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2019-10-13 19:17:16,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2019-10-13 19:17:16,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2019-10-13 19:17:16,155 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2019-10-13 19:17:16,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:16,156 INFO L462 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2019-10-13 19:17:16,156 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-13 19:17:16,156 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2019-10-13 19:17:16,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-13 19:17:16,156 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:16,156 INFO L380 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:16,361 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:16,361 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:16,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:16,362 INFO L82 PathProgramCache]: Analyzing trace with hash 216504007, now seen corresponding path program 28 times [2019-10-13 19:17:16,362 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:16,362 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669011810] [2019-10-13 19:17:16,363 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:16,363 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:16,363 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:16,372 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:16,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1745379060] [2019-10-13 19:17:16,373 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 [2019-10-13 19:17:16,630 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:17:16,630 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:16,632 WARN L254 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 123 conjunts are in the unsatisfiable core [2019-10-13 19:17:16,633 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:17,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:17,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669011810] [2019-10-13 19:17:17,201 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:17,201 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745379060] [2019-10-13 19:17:17,201 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:17,201 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2019-10-13 19:17:17,201 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134110257] [2019-10-13 19:17:17,201 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-10-13 19:17:17,202 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:17,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-10-13 19:17:17,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2019-10-13 19:17:17,203 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 32 states. [2019-10-13 19:17:17,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:17,934 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2019-10-13 19:17:17,935 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-10-13 19:17:17,935 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 39 [2019-10-13 19:17:17,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:17,936 INFO L225 Difference]: With dead ends: 44 [2019-10-13 19:17:17,936 INFO L226 Difference]: Without dead ends: 41 [2019-10-13 19:17:17,937 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 [2019-10-13 19:17:17,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-13 19:17:17,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-13 19:17:17,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-13 19:17:17,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-10-13 19:17:17,942 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2019-10-13 19:17:17,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:17,943 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-10-13 19:17:17,943 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-10-13 19:17:17,943 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-10-13 19:17:17,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-10-13 19:17:17,943 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:17,943 INFO L380 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:18,147 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:18,147 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:18,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:18,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1878372848, now seen corresponding path program 29 times [2019-10-13 19:17:18,148 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:18,148 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205499836] [2019-10-13 19:17:18,148 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:18,149 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:18,149 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:18,157 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:18,157 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1351158830] [2019-10-13 19:17:18,158 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 [2019-10-13 19:17:18,247 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2019-10-13 19:17:18,248 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:18,250 WARN L254 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 127 conjunts are in the unsatisfiable core [2019-10-13 19:17:18,251 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:18,795 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:18,827 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:18,828 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205499836] [2019-10-13 19:17:18,828 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:18,828 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351158830] [2019-10-13 19:17:18,828 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:18,828 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-10-13 19:17:18,828 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120661123] [2019-10-13 19:17:18,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-10-13 19:17:18,829 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:18,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-10-13 19:17:18,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2019-10-13 19:17:18,829 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 33 states. [2019-10-13 19:17:19,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:19,593 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-10-13 19:17:19,594 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-10-13 19:17:19,594 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 40 [2019-10-13 19:17:19,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:19,594 INFO L225 Difference]: With dead ends: 45 [2019-10-13 19:17:19,594 INFO L226 Difference]: Without dead ends: 42 [2019-10-13 19:17:19,595 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 [2019-10-13 19:17:19,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-10-13 19:17:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2019-10-13 19:17:19,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-10-13 19:17:19,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2019-10-13 19:17:19,600 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2019-10-13 19:17:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:19,600 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2019-10-13 19:17:19,601 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-10-13 19:17:19,601 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2019-10-13 19:17:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-10-13 19:17:19,601 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:19,601 INFO L380 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:19,802 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:19,802 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:19,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:19,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1899921383, now seen corresponding path program 30 times [2019-10-13 19:17:19,803 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:19,803 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013585601] [2019-10-13 19:17:19,803 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:19,804 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:19,804 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:19,812 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:19,812 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1581899976] [2019-10-13 19:17:19,813 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 [2019-10-13 19:17:19,979 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2019-10-13 19:17:19,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:19,983 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 131 conjunts are in the unsatisfiable core [2019-10-13 19:17:19,984 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:20,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:20,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013585601] [2019-10-13 19:17:20,589 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:20,589 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581899976] [2019-10-13 19:17:20,589 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:20,589 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2019-10-13 19:17:20,589 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203246235] [2019-10-13 19:17:20,590 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-10-13 19:17:20,590 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:20,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-10-13 19:17:20,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2019-10-13 19:17:20,591 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 34 states. [2019-10-13 19:17:21,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:21,405 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2019-10-13 19:17:21,410 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-10-13 19:17:21,410 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 41 [2019-10-13 19:17:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:21,411 INFO L225 Difference]: With dead ends: 46 [2019-10-13 19:17:21,411 INFO L226 Difference]: Without dead ends: 43 [2019-10-13 19:17:21,412 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 [2019-10-13 19:17:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-10-13 19:17:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-10-13 19:17:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-10-13 19:17:21,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-10-13 19:17:21,416 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2019-10-13 19:17:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:21,417 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-10-13 19:17:21,417 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-10-13 19:17:21,417 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-10-13 19:17:21,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-10-13 19:17:21,417 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:21,418 INFO L380 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:21,621 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:21,622 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:21,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:21,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1232041744, now seen corresponding path program 31 times [2019-10-13 19:17:21,623 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:21,623 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078263845] [2019-10-13 19:17:21,624 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:21,624 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:21,624 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:21,633 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:21,637 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [150752466] [2019-10-13 19:17:21,638 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 [2019-10-13 19:17:21,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:21,727 WARN L254 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 135 conjunts are in the unsatisfiable core [2019-10-13 19:17:21,729 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:22,323 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:22,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078263845] [2019-10-13 19:17:22,364 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:22,364 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150752466] [2019-10-13 19:17:22,364 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:22,364 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-10-13 19:17:22,364 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698210857] [2019-10-13 19:17:22,365 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-10-13 19:17:22,365 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:22,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-10-13 19:17:22,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2019-10-13 19:17:22,365 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 35 states. [2019-10-13 19:17:23,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:23,214 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-10-13 19:17:23,215 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-10-13 19:17:23,215 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 42 [2019-10-13 19:17:23,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:23,216 INFO L225 Difference]: With dead ends: 47 [2019-10-13 19:17:23,216 INFO L226 Difference]: Without dead ends: 44 [2019-10-13 19:17:23,217 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 [2019-10-13 19:17:23,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2019-10-13 19:17:23,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2019-10-13 19:17:23,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-10-13 19:17:23,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2019-10-13 19:17:23,222 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2019-10-13 19:17:23,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:23,222 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2019-10-13 19:17:23,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-10-13 19:17:23,223 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2019-10-13 19:17:23,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-10-13 19:17:23,223 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:23,223 INFO L380 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:23,425 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:23,427 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:23,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:23,428 INFO L82 PathProgramCache]: Analyzing trace with hash 461349127, now seen corresponding path program 32 times [2019-10-13 19:17:23,428 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:23,428 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608549901] [2019-10-13 19:17:23,429 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:23,429 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:23,429 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:23,437 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:23,437 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1959538689] [2019-10-13 19:17:23,437 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 [2019-10-13 19:17:23,536 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:23,537 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:23,539 WARN L254 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 139 conjunts are in the unsatisfiable core [2019-10-13 19:17:23,540 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:24,182 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:24,221 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:24,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608549901] [2019-10-13 19:17:24,221 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:24,221 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959538689] [2019-10-13 19:17:24,221 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:24,222 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2019-10-13 19:17:24,222 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080835953] [2019-10-13 19:17:24,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-10-13 19:17:24,222 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:24,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-10-13 19:17:24,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2019-10-13 19:17:24,223 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 36 states. [2019-10-13 19:17:25,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:25,502 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2019-10-13 19:17:25,502 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-10-13 19:17:25,502 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 43 [2019-10-13 19:17:25,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:25,503 INFO L225 Difference]: With dead ends: 48 [2019-10-13 19:17:25,503 INFO L226 Difference]: Without dead ends: 45 [2019-10-13 19:17:25,504 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 [2019-10-13 19:17:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-10-13 19:17:25,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-10-13 19:17:25,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-10-13 19:17:25,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-10-13 19:17:25,509 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2019-10-13 19:17:25,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:25,509 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-10-13 19:17:25,509 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-10-13 19:17:25,509 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-10-13 19:17:25,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-10-13 19:17:25,510 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:25,510 INFO L380 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:25,712 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:25,712 INFO L410 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:25,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:25,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1416858576, now seen corresponding path program 33 times [2019-10-13 19:17:25,713 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:25,713 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538464113] [2019-10-13 19:17:25,714 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:25,714 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:25,714 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:25,723 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:25,723 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814232011] [2019-10-13 19:17:25,724 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 [2019-10-13 19:17:26,418 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2019-10-13 19:17:26,419 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:26,422 WARN L254 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 143 conjunts are in the unsatisfiable core [2019-10-13 19:17:26,424 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:27,155 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:27,193 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:27,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538464113] [2019-10-13 19:17:27,193 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:27,193 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814232011] [2019-10-13 19:17:27,194 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:27,194 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-10-13 19:17:27,194 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430175685] [2019-10-13 19:17:27,194 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-10-13 19:17:27,194 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:27,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-10-13 19:17:27,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2019-10-13 19:17:27,195 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 37 states. [2019-10-13 19:17:28,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:28,150 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-10-13 19:17:28,151 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-10-13 19:17:28,151 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 44 [2019-10-13 19:17:28,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:28,152 INFO L225 Difference]: With dead ends: 49 [2019-10-13 19:17:28,152 INFO L226 Difference]: Without dead ends: 46 [2019-10-13 19:17:28,153 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 [2019-10-13 19:17:28,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-10-13 19:17:28,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2019-10-13 19:17:28,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-13 19:17:28,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2019-10-13 19:17:28,158 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2019-10-13 19:17:28,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:28,158 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2019-10-13 19:17:28,158 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-10-13 19:17:28,158 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2019-10-13 19:17:28,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-13 19:17:28,159 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:28,159 INFO L380 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:28,362 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:28,363 INFO L410 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:28,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:28,363 INFO L82 PathProgramCache]: Analyzing trace with hash 972880423, now seen corresponding path program 34 times [2019-10-13 19:17:28,364 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:28,364 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949158706] [2019-10-13 19:17:28,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:28,364 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:28,365 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:28,372 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:28,373 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [779901204] [2019-10-13 19:17:28,373 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 [2019-10-13 19:17:28,679 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-13 19:17:28,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:28,682 WARN L254 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 147 conjunts are in the unsatisfiable core [2019-10-13 19:17:28,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:29,397 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:29,434 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949158706] [2019-10-13 19:17:29,434 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:29,435 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779901204] [2019-10-13 19:17:29,435 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:29,435 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2019-10-13 19:17:29,435 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9170324] [2019-10-13 19:17:29,435 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-10-13 19:17:29,435 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:29,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-10-13 19:17:29,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2019-10-13 19:17:29,436 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand 38 states. [2019-10-13 19:17:30,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:30,465 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2019-10-13 19:17:30,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-10-13 19:17:30,465 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 45 [2019-10-13 19:17:30,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:30,466 INFO L225 Difference]: With dead ends: 50 [2019-10-13 19:17:30,466 INFO L226 Difference]: Without dead ends: 47 [2019-10-13 19:17:30,466 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 [2019-10-13 19:17:30,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-13 19:17:30,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-13 19:17:30,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-13 19:17:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-10-13 19:17:30,475 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2019-10-13 19:17:30,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:30,475 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-10-13 19:17:30,476 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-10-13 19:17:30,476 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-10-13 19:17:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-10-13 19:17:30,476 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:30,476 INFO L380 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:30,680 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:30,680 INFO L410 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:30,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:30,681 INFO L82 PathProgramCache]: Analyzing trace with hash 94459568, now seen corresponding path program 35 times [2019-10-13 19:17:30,681 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:30,681 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108947369] [2019-10-13 19:17:30,681 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:30,682 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:30,682 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:30,689 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:30,690 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [108299791] [2019-10-13 19:17:30,690 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:30,800 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2019-10-13 19:17:30,800 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:30,803 WARN L254 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 151 conjunts are in the unsatisfiable core [2019-10-13 19:17:30,804 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:31,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:31,616 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:31,616 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108947369] [2019-10-13 19:17:31,617 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:31,617 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108299791] [2019-10-13 19:17:31,617 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:31,617 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-10-13 19:17:31,617 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583057152] [2019-10-13 19:17:31,617 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-10-13 19:17:31,617 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:31,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-10-13 19:17:31,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2019-10-13 19:17:31,618 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 39 states. [2019-10-13 19:17:32,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:32,710 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-10-13 19:17:32,710 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-10-13 19:17:32,710 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 46 [2019-10-13 19:17:32,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:32,710 INFO L225 Difference]: With dead ends: 51 [2019-10-13 19:17:32,711 INFO L226 Difference]: Without dead ends: 48 [2019-10-13 19:17:32,711 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 [2019-10-13 19:17:32,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-10-13 19:17:32,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2019-10-13 19:17:32,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-10-13 19:17:32,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2019-10-13 19:17:32,716 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2019-10-13 19:17:32,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:32,716 INFO L462 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2019-10-13 19:17:32,716 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-10-13 19:17:32,716 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2019-10-13 19:17:32,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-10-13 19:17:32,716 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:32,716 INFO L380 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:32,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:32,917 INFO L410 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:32,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:32,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1366783161, now seen corresponding path program 36 times [2019-10-13 19:17:32,918 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:32,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978848223] [2019-10-13 19:17:32,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:32,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:32,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:32,927 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:32,927 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657799007] [2019-10-13 19:17:32,928 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:33,173 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-13 19:17:33,174 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:33,177 WARN L254 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 155 conjunts are in the unsatisfiable core [2019-10-13 19:17:33,178 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:33,947 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:33,989 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978848223] [2019-10-13 19:17:33,990 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:33,990 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657799007] [2019-10-13 19:17:33,990 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:33,990 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2019-10-13 19:17:33,990 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464976612] [2019-10-13 19:17:33,990 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-10-13 19:17:33,990 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:33,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-10-13 19:17:33,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2019-10-13 19:17:33,991 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 40 states. [2019-10-13 19:17:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:35,085 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2019-10-13 19:17:35,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-10-13 19:17:35,085 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 47 [2019-10-13 19:17:35,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:35,086 INFO L225 Difference]: With dead ends: 52 [2019-10-13 19:17:35,086 INFO L226 Difference]: Without dead ends: 49 [2019-10-13 19:17:35,088 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=81, Invalid=1559, Unknown=0, NotChecked=0, Total=1640 [2019-10-13 19:17:35,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-10-13 19:17:35,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-10-13 19:17:35,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-10-13 19:17:35,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-10-13 19:17:35,092 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2019-10-13 19:17:35,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:35,093 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-10-13 19:17:35,093 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-10-13 19:17:35,093 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-10-13 19:17:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-10-13 19:17:35,093 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:35,093 INFO L380 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:35,296 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:35,297 INFO L410 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:35,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:35,297 INFO L82 PathProgramCache]: Analyzing trace with hash 579332496, now seen corresponding path program 37 times [2019-10-13 19:17:35,298 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:35,298 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917961745] [2019-10-13 19:17:35,298 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:35,298 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:35,299 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:35,307 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:35,307 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771995085] [2019-10-13 19:17:35,308 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-13 19:17:35,462 WARN L254 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 159 conjunts are in the unsatisfiable core [2019-10-13 19:17:35,465 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:36,505 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:36,545 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917961745] [2019-10-13 19:17:36,545 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:36,545 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771995085] [2019-10-13 19:17:36,545 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:36,545 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-10-13 19:17:36,545 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678069852] [2019-10-13 19:17:36,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-10-13 19:17:36,546 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:36,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-10-13 19:17:36,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2019-10-13 19:17:36,547 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 41 states. [2019-10-13 19:17:37,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:37,706 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-10-13 19:17:37,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-10-13 19:17:37,706 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 48 [2019-10-13 19:17:37,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:37,707 INFO L225 Difference]: With dead ends: 53 [2019-10-13 19:17:37,707 INFO L226 Difference]: Without dead ends: 50 [2019-10-13 19:17:37,708 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 [2019-10-13 19:17:37,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-10-13 19:17:37,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2019-10-13 19:17:37,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-10-13 19:17:37,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2019-10-13 19:17:37,713 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2019-10-13 19:17:37,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:37,713 INFO L462 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2019-10-13 19:17:37,713 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-10-13 19:17:37,713 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2019-10-13 19:17:37,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-10-13 19:17:37,714 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:37,714 INFO L380 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-13 19:17:37,917 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:37,918 INFO L410 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-13 19:17:37,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-13 19:17:37,918 INFO L82 PathProgramCache]: Analyzing trace with hash 779375719, now seen corresponding path program 38 times [2019-10-13 19:17:37,918 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-13 19:17:37,918 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895083115] [2019-10-13 19:17:37,918 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:37,919 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-13 19:17:37,919 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-13 19:17:37,930 ERROR L273 tionRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-10-13 19:17:37,931 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1101621397] [2019-10-13 19:17:37,931 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-13 19:17:38,039 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-13 19:17:38,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-13 19:17:38,042 WARN L254 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 163 conjunts are in the unsatisfiable core [2019-10-13 19:17:38,043 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-13 19:17:38,909 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-13 19:17:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-13 19:17:38,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895083115] [2019-10-13 19:17:38,950 INFO L337 tionRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-10-13 19:17:38,950 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101621397] [2019-10-13 19:17:38,951 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-10-13 19:17:38,951 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2019-10-13 19:17:38,951 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296948740] [2019-10-13 19:17:38,951 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-13 19:17:38,951 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-13 19:17:38,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-13 19:17:38,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2019-10-13 19:17:38,952 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand 42 states. [2019-10-13 19:17:40,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-13 19:17:40,200 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2019-10-13 19:17:40,200 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-13 19:17:40,200 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 49 [2019-10-13 19:17:40,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-13 19:17:40,201 INFO L225 Difference]: With dead ends: 54 [2019-10-13 19:17:40,201 INFO L226 Difference]: Without dead ends: 51 [2019-10-13 19:17:40,203 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 [2019-10-13 19:17:40,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-10-13 19:17:40,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-10-13 19:17:40,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-10-13 19:17:40,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-10-13 19:17:40,208 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2019-10-13 19:17:40,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-13 19:17:40,209 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-10-13 19:17:40,209 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-13 19:17:40,209 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-10-13 19:17:40,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-10-13 19:17:40,209 INFO L372 BasicCegarLoop]: Found error trace [2019-10-13 19:17:40,209 INFO L380 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]