/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/gauss_sum.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 22:12:05,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 22:12:05,056 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 22:12:05,072 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 22:12:05,073 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 22:12:05,074 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 22:12:05,076 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 22:12:05,085 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 22:12:05,088 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 22:12:05,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 22:12:05,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 22:12:05,092 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 22:12:05,093 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 22:12:05,096 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 22:12:05,098 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 22:12:05,100 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 22:12:05,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 22:12:05,103 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 22:12:05,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 22:12:05,109 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 22:12:05,114 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 22:12:05,116 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 22:12:05,117 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 22:12:05,118 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 22:12:05,120 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 22:12:05,120 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 22:12:05,120 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 22:12:05,121 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 22:12:05,121 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 22:12:05,122 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 22:12:05,122 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 22:12:05,123 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 22:12:05,124 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 22:12:05,124 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 22:12:05,125 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 22:12:05,126 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 22:12:05,126 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 22:12:05,126 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 22:12:05,127 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 22:12:05,127 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 22:12:05,128 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 22:12:05,129 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 22:12:05,156 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 22:12:05,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 22:12:05,158 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 22:12:05,158 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 22:12:05,158 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 22:12:05,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 22:12:05,159 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 22:12:05,159 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 22:12:05,159 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 22:12:05,159 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 22:12:05,159 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 22:12:05,163 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 22:12:05,163 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 22:12:05,163 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 22:12:05,163 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 22:12:05,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 22:12:05,164 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 22:12:05,164 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 22:12:05,164 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 22:12:05,164 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 22:12:05,167 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 22:12:05,167 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 22:12:05,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:12:05,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 22:12:05,168 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 22:12:05,168 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 22:12:05,168 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 22:12:05,168 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 22:12:05,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 22:12:05,169 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 22:12:05,443 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 22:12:05,455 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 22:12:05,459 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 22:12:05,460 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 22:12:05,461 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 22:12:05,462 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/gauss_sum.i [2019-11-23 22:12:05,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c334e32de/e705d861da8049caa6a6bb45c8cc8554/FLAG612e75bb6 [2019-11-23 22:12:05,972 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 22:12:05,973 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/gauss_sum.i [2019-11-23 22:12:05,979 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c334e32de/e705d861da8049caa6a6bb45c8cc8554/FLAG612e75bb6 [2019-11-23 22:12:06,345 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c334e32de/e705d861da8049caa6a6bb45c8cc8554 [2019-11-23 22:12:06,354 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 22:12:06,356 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 22:12:06,357 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 22:12:06,357 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 22:12:06,361 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 22:12:06,363 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:12:06" (1/1) ... [2019-11-23 22:12:06,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@23ed8def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:06, skipping insertion in model container [2019-11-23 22:12:06,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:12:06" (1/1) ... [2019-11-23 22:12:06,376 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 22:12:06,397 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 22:12:06,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:12:06,569 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 22:12:06,590 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 22:12:06,607 INFO L208 MainTranslator]: Completed translation [2019-11-23 22:12:06,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:06 WrapperNode [2019-11-23 22:12:06,608 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 22:12:06,609 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 22:12:06,609 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 22:12:06,609 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 22:12:06,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:06" (1/1) ... [2019-11-23 22:12:06,627 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:06" (1/1) ... [2019-11-23 22:12:06,646 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 22:12:06,646 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 22:12:06,647 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 22:12:06,647 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 22:12:06,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:06" (1/1) ... [2019-11-23 22:12:06,655 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:06" (1/1) ... [2019-11-23 22:12:06,656 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:06" (1/1) ... [2019-11-23 22:12:06,656 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:06" (1/1) ... [2019-11-23 22:12:06,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:06" (1/1) ... [2019-11-23 22:12:06,745 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:06" (1/1) ... [2019-11-23 22:12:06,746 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:06" (1/1) ... [2019-11-23 22:12:06,749 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 22:12:06,749 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 22:12:06,750 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 22:12:06,750 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 22:12:06,751 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 22:12:06,812 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 22:12:06,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 22:12:06,967 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 22:12:06,968 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-23 22:12:06,969 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:12:06 BoogieIcfgContainer [2019-11-23 22:12:06,969 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 22:12:06,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 22:12:06,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 22:12:06,973 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 22:12:06,973 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:12:06" (1/3) ... [2019-11-23 22:12:06,974 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de7fe3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:12:06, skipping insertion in model container [2019-11-23 22:12:06,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:12:06" (2/3) ... [2019-11-23 22:12:06,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2de7fe3c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:12:06, skipping insertion in model container [2019-11-23 22:12:06,975 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:12:06" (3/3) ... [2019-11-23 22:12:06,976 INFO L109 eAbstractionObserver]: Analyzing ICFG gauss_sum.i [2019-11-23 22:12:06,984 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 22:12:06,990 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 22:12:07,000 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 22:12:07,034 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 22:12:07,035 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 22:12:07,035 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 22:12:07,035 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 22:12:07,035 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 22:12:07,035 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 22:12:07,036 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 22:12:07,036 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 22:12:07,047 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2019-11-23 22:12:07,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 22:12:07,052 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:07,052 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 22:12:07,053 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:07,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:07,058 INFO L82 PathProgramCache]: Analyzing trace with hash 922230154, now seen corresponding path program 1 times [2019-11-23 22:12:07,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:07,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505337933] [2019-11-23 22:12:07,066 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:07,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:07,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:07,164 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505337933] [2019-11-23 22:12:07,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:12:07,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 22:12:07,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975740360] [2019-11-23 22:12:07,171 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 22:12:07,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:07,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 22:12:07,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:12:07,188 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2019-11-23 22:12:07,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:07,203 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2019-11-23 22:12:07,203 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 22:12:07,204 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-11-23 22:12:07,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:07,212 INFO L225 Difference]: With dead ends: 20 [2019-11-23 22:12:07,212 INFO L226 Difference]: Without dead ends: 8 [2019-11-23 22:12:07,214 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 22:12:07,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-23 22:12:07,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-23 22:12:07,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-23 22:12:07,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-23 22:12:07,242 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-11-23 22:12:07,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:07,243 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-23 22:12:07,243 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 22:12:07,243 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-23 22:12:07,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-23 22:12:07,243 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:07,243 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-23 22:12:07,244 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:07,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:07,244 INFO L82 PathProgramCache]: Analyzing trace with hash 922051408, now seen corresponding path program 1 times [2019-11-23 22:12:07,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:07,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871019878] [2019-11-23 22:12:07,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:07,254 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:07,254 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [695312250] [2019-11-23 22:12:07,255 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:07,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 22:12:07,290 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:07,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:07,340 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871019878] [2019-11-23 22:12:07,340 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:07,341 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695312250] [2019-11-23 22:12:07,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 22:12:07,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 22:12:07,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389259091] [2019-11-23 22:12:07,343 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 22:12:07,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:07,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 22:12:07,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:12:07,345 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 3 states. [2019-11-23 22:12:07,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:07,380 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-11-23 22:12:07,380 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 22:12:07,381 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2019-11-23 22:12:07,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:07,381 INFO L225 Difference]: With dead ends: 14 [2019-11-23 22:12:07,382 INFO L226 Difference]: Without dead ends: 10 [2019-11-23 22:12:07,383 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 22:12:07,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-23 22:12:07,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-11-23 22:12:07,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-23 22:12:07,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-23 22:12:07,388 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-11-23 22:12:07,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:07,388 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-23 22:12:07,388 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 22:12:07,389 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-23 22:12:07,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-23 22:12:07,399 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:07,399 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:07,600 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:07,601 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:07,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:07,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1381372562, now seen corresponding path program 1 times [2019-11-23 22:12:07,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:07,603 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480850535] [2019-11-23 22:12:07,603 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:07,611 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:07,612 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1862321584] [2019-11-23 22:12:07,612 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:07,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:07,643 WARN L253 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 22:12:07,645 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:07,749 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:07,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:07,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480850535] [2019-11-23 22:12:07,785 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:07,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862321584] [2019-11-23 22:12:07,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:07,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2019-11-23 22:12:07,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054884117] [2019-11-23 22:12:07,788 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 22:12:07,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:07,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 22:12:07,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2019-11-23 22:12:07,789 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand 7 states. [2019-11-23 22:12:07,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:07,894 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2019-11-23 22:12:07,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 22:12:07,895 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 8 [2019-11-23 22:12:07,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:07,896 INFO L225 Difference]: With dead ends: 15 [2019-11-23 22:12:07,896 INFO L226 Difference]: Without dead ends: 11 [2019-11-23 22:12:07,897 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:12:07,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2019-11-23 22:12:07,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2019-11-23 22:12:07,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2019-11-23 22:12:07,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2019-11-23 22:12:07,902 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2019-11-23 22:12:07,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:07,904 INFO L462 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2019-11-23 22:12:07,905 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 22:12:07,905 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2019-11-23 22:12:07,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 22:12:07,906 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:07,907 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:08,111 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:08,112 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:08,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:08,113 INFO L82 PathProgramCache]: Analyzing trace with hash 407370068, now seen corresponding path program 2 times [2019-11-23 22:12:08,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:08,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586148492] [2019-11-23 22:12:08,114 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:08,126 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:08,126 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868205522] [2019-11-23 22:12:08,127 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 [2019-11-23 22:12:08,152 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:08,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:08,154 WARN L253 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 22:12:08,155 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:08,264 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:08,287 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586148492] [2019-11-23 22:12:08,287 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:08,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868205522] [2019-11-23 22:12:08,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:08,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2019-11-23 22:12:08,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482924018] [2019-11-23 22:12:08,291 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-23 22:12:08,292 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:08,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-23 22:12:08,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2019-11-23 22:12:08,293 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand 9 states. [2019-11-23 22:12:08,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:08,408 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2019-11-23 22:12:08,409 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 22:12:08,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 10 [2019-11-23 22:12:08,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:08,410 INFO L225 Difference]: With dead ends: 17 [2019-11-23 22:12:08,410 INFO L226 Difference]: Without dead ends: 13 [2019-11-23 22:12:08,411 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:12:08,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-11-23 22:12:08,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-11-23 22:12:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-11-23 22:12:08,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2019-11-23 22:12:08,416 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2019-11-23 22:12:08,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:08,416 INFO L462 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2019-11-23 22:12:08,416 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-23 22:12:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2019-11-23 22:12:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 22:12:08,417 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:08,417 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:08,620 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:08,621 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:08,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:08,621 INFO L82 PathProgramCache]: Analyzing trace with hash 693843862, now seen corresponding path program 3 times [2019-11-23 22:12:08,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:08,622 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130102420] [2019-11-23 22:12:08,622 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:08,632 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:08,632 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1683487028] [2019-11-23 22:12:08,633 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 [2019-11-23 22:12:08,679 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-23 22:12:08,679 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:08,680 WARN L253 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-23 22:12:08,681 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:08,810 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:08,832 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130102420] [2019-11-23 22:12:08,833 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:08,833 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683487028] [2019-11-23 22:12:08,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:08,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2019-11-23 22:12:08,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008352822] [2019-11-23 22:12:08,834 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 22:12:08,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:08,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 22:12:08,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2019-11-23 22:12:08,835 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 11 states. [2019-11-23 22:12:08,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:08,981 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2019-11-23 22:12:08,982 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 22:12:08,982 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2019-11-23 22:12:08,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:08,983 INFO L225 Difference]: With dead ends: 19 [2019-11-23 22:12:08,983 INFO L226 Difference]: Without dead ends: 15 [2019-11-23 22:12:08,984 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:12:08,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2019-11-23 22:12:08,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2019-11-23 22:12:08,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-23 22:12:08,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2019-11-23 22:12:08,993 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2019-11-23 22:12:08,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:08,993 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2019-11-23 22:12:08,993 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 22:12:08,993 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2019-11-23 22:12:08,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-23 22:12:08,995 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:08,995 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:09,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:09,196 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:09,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:09,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1117252952, now seen corresponding path program 4 times [2019-11-23 22:12:09,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:09,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117206547] [2019-11-23 22:12:09,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:09,205 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:09,206 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814311177] [2019-11-23 22:12:09,206 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 [2019-11-23 22:12:09,235 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:09,236 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:09,238 WARN L253 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-23 22:12:09,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:09,379 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:09,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117206547] [2019-11-23 22:12:09,397 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:09,397 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814311177] [2019-11-23 22:12:09,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:09,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2019-11-23 22:12:09,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385219179] [2019-11-23 22:12:09,398 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 22:12:09,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:09,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 22:12:09,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2019-11-23 22:12:09,399 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 13 states. [2019-11-23 22:12:09,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:09,528 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2019-11-23 22:12:09,528 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 22:12:09,529 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2019-11-23 22:12:09,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:09,530 INFO L225 Difference]: With dead ends: 21 [2019-11-23 22:12:09,530 INFO L226 Difference]: Without dead ends: 17 [2019-11-23 22:12:09,531 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:12:09,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2019-11-23 22:12:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2019-11-23 22:12:09,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-23 22:12:09,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-11-23 22:12:09,534 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2019-11-23 22:12:09,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:09,534 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-11-23 22:12:09,535 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 22:12:09,535 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-11-23 22:12:09,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-23 22:12:09,535 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:09,535 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:09,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:09,739 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:09,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:09,740 INFO L82 PathProgramCache]: Analyzing trace with hash -8504678, now seen corresponding path program 5 times [2019-11-23 22:12:09,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:09,741 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491993870] [2019-11-23 22:12:09,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:09,751 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:09,751 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079336949] [2019-11-23 22:12:09,751 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 [2019-11-23 22:12:09,777 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 22:12:09,778 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:09,779 WARN L253 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-23 22:12:09,780 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:09,994 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:10,018 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:10,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491993870] [2019-11-23 22:12:10,019 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:10,020 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079336949] [2019-11-23 22:12:10,020 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:10,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2019-11-23 22:12:10,021 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434019324] [2019-11-23 22:12:10,021 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 22:12:10,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:10,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 22:12:10,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2019-11-23 22:12:10,022 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 15 states. [2019-11-23 22:12:10,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:10,258 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2019-11-23 22:12:10,258 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 22:12:10,259 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 16 [2019-11-23 22:12:10,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:10,259 INFO L225 Difference]: With dead ends: 23 [2019-11-23 22:12:10,260 INFO L226 Difference]: Without dead ends: 19 [2019-11-23 22:12:10,260 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:12:10,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-23 22:12:10,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-23 22:12:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-23 22:12:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2019-11-23 22:12:10,265 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2019-11-23 22:12:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:10,265 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2019-11-23 22:12:10,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 22:12:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2019-11-23 22:12:10,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2019-11-23 22:12:10,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:10,266 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:10,475 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:10,475 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:10,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:10,476 INFO L82 PathProgramCache]: Analyzing trace with hash 470171484, now seen corresponding path program 6 times [2019-11-23 22:12:10,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:10,478 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686027077] [2019-11-23 22:12:10,479 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:10,492 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:10,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789809280] [2019-11-23 22:12:10,492 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 [2019-11-23 22:12:10,522 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-23 22:12:10,522 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:10,524 WARN L253 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-23 22:12:10,525 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:10,755 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:10,784 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686027077] [2019-11-23 22:12:10,785 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:10,785 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789809280] [2019-11-23 22:12:10,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:10,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2019-11-23 22:12:10,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382646450] [2019-11-23 22:12:10,786 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 22:12:10,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:10,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 22:12:10,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2019-11-23 22:12:10,787 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 17 states. [2019-11-23 22:12:10,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:10,994 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2019-11-23 22:12:10,994 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 22:12:10,995 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 18 [2019-11-23 22:12:10,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:10,995 INFO L225 Difference]: With dead ends: 25 [2019-11-23 22:12:10,996 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 22:12:10,996 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=300, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:12:10,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 22:12:11,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-23 22:12:11,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 22:12:11,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2019-11-23 22:12:11,001 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2019-11-23 22:12:11,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:11,001 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2019-11-23 22:12:11,001 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 22:12:11,001 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2019-11-23 22:12:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 22:12:11,002 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:11,002 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:11,205 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:11,206 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:11,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:11,207 INFO L82 PathProgramCache]: Analyzing trace with hash 916462494, now seen corresponding path program 7 times [2019-11-23 22:12:11,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:11,208 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481751457] [2019-11-23 22:12:11,208 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:11,224 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:11,224 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588581567] [2019-11-23 22:12:11,224 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 [2019-11-23 22:12:11,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:11,254 WARN L253 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 39 conjunts are in the unsatisfiable core [2019-11-23 22:12:11,255 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:11,516 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:11,536 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:11,536 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481751457] [2019-11-23 22:12:11,537 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:11,537 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588581567] [2019-11-23 22:12:11,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:11,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2019-11-23 22:12:11,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117073897] [2019-11-23 22:12:11,537 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 22:12:11,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:11,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 22:12:11,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2019-11-23 22:12:11,539 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 19 states. [2019-11-23 22:12:11,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:11,809 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2019-11-23 22:12:11,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 22:12:11,809 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 20 [2019-11-23 22:12:11,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:11,810 INFO L225 Difference]: With dead ends: 27 [2019-11-23 22:12:11,810 INFO L226 Difference]: Without dead ends: 23 [2019-11-23 22:12:11,810 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=46, Invalid=374, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:12:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2019-11-23 22:12:11,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2019-11-23 22:12:11,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-11-23 22:12:11,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2019-11-23 22:12:11,816 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2019-11-23 22:12:11,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:11,816 INFO L462 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2019-11-23 22:12:11,816 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 22:12:11,816 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2019-11-23 22:12:11,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-11-23 22:12:11,817 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:11,817 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:12,020 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:12,020 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:12,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:12,021 INFO L82 PathProgramCache]: Analyzing trace with hash 305393504, now seen corresponding path program 8 times [2019-11-23 22:12:12,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:12,022 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352042473] [2019-11-23 22:12:12,022 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:12,032 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:12,033 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1658284707] [2019-11-23 22:12:12,033 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 [2019-11-23 22:12:12,061 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:12,062 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:12,062 WARN L253 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 43 conjunts are in the unsatisfiable core [2019-11-23 22:12:12,064 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:12,334 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:12,368 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:12,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352042473] [2019-11-23 22:12:12,369 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:12,369 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658284707] [2019-11-23 22:12:12,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:12,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2019-11-23 22:12:12,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327584503] [2019-11-23 22:12:12,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-23 22:12:12,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:12,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-23 22:12:12,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2019-11-23 22:12:12,372 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 21 states. [2019-11-23 22:12:12,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:12,696 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2019-11-23 22:12:12,696 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 22:12:12,697 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 22 [2019-11-23 22:12:12,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:12,697 INFO L225 Difference]: With dead ends: 29 [2019-11-23 22:12:12,697 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 22:12:12,698 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:12:12,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 22:12:12,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2019-11-23 22:12:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 22:12:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2019-11-23 22:12:12,703 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2019-11-23 22:12:12,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:12,703 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2019-11-23 22:12:12,703 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-23 22:12:12,703 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2019-11-23 22:12:12,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-23 22:12:12,704 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:12,704 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:12,913 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:12,913 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:12,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1478613666, now seen corresponding path program 9 times [2019-11-23 22:12:12,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:12,914 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147339966] [2019-11-23 22:12:12,915 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:12,930 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:12,931 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335761446] [2019-11-23 22:12:12,931 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 [2019-11-23 22:12:12,963 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-23 22:12:12,963 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:12,964 WARN L253 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 47 conjunts are in the unsatisfiable core [2019-11-23 22:12:12,966 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:13,295 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:13,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147339966] [2019-11-23 22:12:13,323 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:13,323 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335761446] [2019-11-23 22:12:13,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:13,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2019-11-23 22:12:13,324 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213808493] [2019-11-23 22:12:13,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 22:12:13,324 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:13,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 22:12:13,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2019-11-23 22:12:13,325 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 23 states. [2019-11-23 22:12:13,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:13,734 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2019-11-23 22:12:13,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-23 22:12:13,734 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 24 [2019-11-23 22:12:13,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:13,735 INFO L225 Difference]: With dead ends: 31 [2019-11-23 22:12:13,735 INFO L226 Difference]: Without dead ends: 27 [2019-11-23 22:12:13,736 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:12:13,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-23 22:12:13,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2019-11-23 22:12:13,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-23 22:12:13,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2019-11-23 22:12:13,741 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2019-11-23 22:12:13,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:13,742 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2019-11-23 22:12:13,742 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 22:12:13,742 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2019-11-23 22:12:13,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2019-11-23 22:12:13,743 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:13,743 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:13,946 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:13,946 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:13,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:13,947 INFO L82 PathProgramCache]: Analyzing trace with hash -633209500, now seen corresponding path program 10 times [2019-11-23 22:12:13,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:13,948 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278899607] [2019-11-23 22:12:13,948 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:13,960 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:13,960 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1889076152] [2019-11-23 22:12:13,961 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 [2019-11-23 22:12:13,999 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:13,999 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:14,000 WARN L253 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 51 conjunts are in the unsatisfiable core [2019-11-23 22:12:14,002 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:14,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:14,392 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:14,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278899607] [2019-11-23 22:12:14,393 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:14,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889076152] [2019-11-23 22:12:14,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:14,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2019-11-23 22:12:14,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546109575] [2019-11-23 22:12:14,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 22:12:14,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:14,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 22:12:14,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2019-11-23 22:12:14,395 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 25 states. [2019-11-23 22:12:14,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:14,855 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2019-11-23 22:12:14,855 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-23 22:12:14,856 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 26 [2019-11-23 22:12:14,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:14,857 INFO L225 Difference]: With dead ends: 33 [2019-11-23 22:12:14,857 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 22:12:14,858 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=644, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:12:14,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 22:12:14,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2019-11-23 22:12:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 22:12:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2019-11-23 22:12:14,863 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2019-11-23 22:12:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:14,863 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2019-11-23 22:12:14,863 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 22:12:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2019-11-23 22:12:14,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 22:12:14,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:14,864 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:15,067 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:15,067 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:15,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:15,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1424258982, now seen corresponding path program 11 times [2019-11-23 22:12:15,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:15,069 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956383146] [2019-11-23 22:12:15,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:15,078 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:15,079 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [591371396] [2019-11-23 22:12:15,079 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 [2019-11-23 22:12:15,107 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-23 22:12:15,107 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:15,108 WARN L253 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 55 conjunts are in the unsatisfiable core [2019-11-23 22:12:15,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:15,533 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:15,563 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:15,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956383146] [2019-11-23 22:12:15,564 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:15,564 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591371396] [2019-11-23 22:12:15,564 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:15,564 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2019-11-23 22:12:15,564 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180702995] [2019-11-23 22:12:15,565 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 22:12:15,565 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:15,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 22:12:15,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2019-11-23 22:12:15,566 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 27 states. [2019-11-23 22:12:16,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:16,078 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2019-11-23 22:12:16,078 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-23 22:12:16,078 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 28 [2019-11-23 22:12:16,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:16,079 INFO L225 Difference]: With dead ends: 35 [2019-11-23 22:12:16,079 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 22:12:16,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=750, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:12:16,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 22:12:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2019-11-23 22:12:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-11-23 22:12:16,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2019-11-23 22:12:16,086 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2019-11-23 22:12:16,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:16,086 INFO L462 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2019-11-23 22:12:16,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 22:12:16,086 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2019-11-23 22:12:16,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 22:12:16,087 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:16,087 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:16,287 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:16,288 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:16,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:16,289 INFO L82 PathProgramCache]: Analyzing trace with hash -1328453272, now seen corresponding path program 12 times [2019-11-23 22:12:16,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:16,289 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278553234] [2019-11-23 22:12:16,289 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:16,300 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:16,300 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011256059] [2019-11-23 22:12:16,300 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 [2019-11-23 22:12:16,348 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-23 22:12:16,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:16,349 WARN L253 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 59 conjunts are in the unsatisfiable core [2019-11-23 22:12:16,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:16,870 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:16,901 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:16,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278553234] [2019-11-23 22:12:16,901 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:16,901 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011256059] [2019-11-23 22:12:16,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:16,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2019-11-23 22:12:16,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628658969] [2019-11-23 22:12:16,902 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-23 22:12:16,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:16,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-23 22:12:16,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2019-11-23 22:12:16,903 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 29 states. [2019-11-23 22:12:17,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:17,481 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2019-11-23 22:12:17,482 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-23 22:12:17,482 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 30 [2019-11-23 22:12:17,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:17,482 INFO L225 Difference]: With dead ends: 37 [2019-11-23 22:12:17,483 INFO L226 Difference]: Without dead ends: 33 [2019-11-23 22:12:17,483 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=66, Invalid=864, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:12:17,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-11-23 22:12:17,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-11-23 22:12:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-23 22:12:17,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2019-11-23 22:12:17,488 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2019-11-23 22:12:17,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:17,489 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2019-11-23 22:12:17,489 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-23 22:12:17,489 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2019-11-23 22:12:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-23 22:12:17,490 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:17,490 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:17,693 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:17,693 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:17,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:17,694 INFO L82 PathProgramCache]: Analyzing trace with hash -985075030, now seen corresponding path program 13 times [2019-11-23 22:12:17,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:17,695 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513657815] [2019-11-23 22:12:17,695 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:17,705 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:17,706 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [833357927] [2019-11-23 22:12:17,706 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 [2019-11-23 22:12:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:17,743 WARN L253 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 63 conjunts are in the unsatisfiable core [2019-11-23 22:12:17,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:18,238 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:18,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513657815] [2019-11-23 22:12:18,273 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:18,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833357927] [2019-11-23 22:12:18,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:18,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2019-11-23 22:12:18,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567849247] [2019-11-23 22:12:18,274 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 22:12:18,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:18,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 22:12:18,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2019-11-23 22:12:18,276 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 31 states. [2019-11-23 22:12:18,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:18,832 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2019-11-23 22:12:18,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-23 22:12:18,837 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 32 [2019-11-23 22:12:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:18,838 INFO L225 Difference]: With dead ends: 39 [2019-11-23 22:12:18,838 INFO L226 Difference]: Without dead ends: 35 [2019-11-23 22:12:18,839 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=986, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:12:18,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-23 22:12:18,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2019-11-23 22:12:18,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-23 22:12:18,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2019-11-23 22:12:18,846 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2019-11-23 22:12:18,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:18,847 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2019-11-23 22:12:18,847 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 22:12:18,847 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2019-11-23 22:12:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-23 22:12:18,848 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:18,848 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:19,050 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:19,051 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:19,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:19,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1711066260, now seen corresponding path program 14 times [2019-11-23 22:12:19,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:19,052 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522341586] [2019-11-23 22:12:19,052 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:19,065 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:19,066 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [840927478] [2019-11-23 22:12:19,066 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 [2019-11-23 22:12:19,113 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:19,113 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:19,114 WARN L253 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 67 conjunts are in the unsatisfiable core [2019-11-23 22:12:19,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:19,693 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:19,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522341586] [2019-11-23 22:12:19,727 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:19,727 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840927478] [2019-11-23 22:12:19,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:19,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2019-11-23 22:12:19,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412847565] [2019-11-23 22:12:19,728 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 22:12:19,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:19,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 22:12:19,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 22:12:19,729 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 33 states. [2019-11-23 22:12:20,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:20,449 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2019-11-23 22:12:20,449 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-23 22:12:20,449 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 34 [2019-11-23 22:12:20,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:20,450 INFO L225 Difference]: With dead ends: 41 [2019-11-23 22:12:20,451 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 22:12:20,452 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:12:20,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 22:12:20,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-11-23 22:12:20,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-11-23 22:12:20,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2019-11-23 22:12:20,457 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2019-11-23 22:12:20,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:20,457 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2019-11-23 22:12:20,457 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 22:12:20,457 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2019-11-23 22:12:20,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-11-23 22:12:20,458 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:20,458 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:20,661 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:20,661 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:20,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:20,662 INFO L82 PathProgramCache]: Analyzing trace with hash 691030958, now seen corresponding path program 15 times [2019-11-23 22:12:20,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:20,663 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754963728] [2019-11-23 22:12:20,663 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:20,673 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:20,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060911824] [2019-11-23 22:12:20,674 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 [2019-11-23 22:12:20,750 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-23 22:12:20,750 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:20,751 WARN L253 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 71 conjunts are in the unsatisfiable core [2019-11-23 22:12:20,753 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:21,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:21,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754963728] [2019-11-23 22:12:21,450 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:21,450 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060911824] [2019-11-23 22:12:21,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:21,450 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2019-11-23 22:12:21,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159453664] [2019-11-23 22:12:21,451 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 22:12:21,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:21,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 22:12:21,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 22:12:21,452 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 35 states. [2019-11-23 22:12:22,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:22,262 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2019-11-23 22:12:22,262 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 22:12:22,263 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 36 [2019-11-23 22:12:22,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:22,263 INFO L225 Difference]: With dead ends: 43 [2019-11-23 22:12:22,263 INFO L226 Difference]: Without dead ends: 39 [2019-11-23 22:12:22,264 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=78, Invalid=1254, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:12:22,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-11-23 22:12:22,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2019-11-23 22:12:22,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-23 22:12:22,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2019-11-23 22:12:22,275 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2019-11-23 22:12:22,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:22,276 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2019-11-23 22:12:22,276 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 22:12:22,276 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2019-11-23 22:12:22,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 22:12:22,277 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:22,277 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:22,480 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:22,480 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:22,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:22,481 INFO L82 PathProgramCache]: Analyzing trace with hash -1585947792, now seen corresponding path program 16 times [2019-11-23 22:12:22,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:22,481 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917996270] [2019-11-23 22:12:22,482 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:22,491 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:22,492 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1659894386] [2019-11-23 22:12:22,492 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 [2019-11-23 22:12:22,529 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:22,529 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:22,531 WARN L253 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 75 conjunts are in the unsatisfiable core [2019-11-23 22:12:22,532 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:23,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:23,292 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:23,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917996270] [2019-11-23 22:12:23,292 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:23,293 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659894386] [2019-11-23 22:12:23,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:23,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2019-11-23 22:12:23,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991631311] [2019-11-23 22:12:23,293 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 22:12:23,294 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:23,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 22:12:23,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 22:12:23,294 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 37 states. [2019-11-23 22:12:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:24,188 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2019-11-23 22:12:24,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-23 22:12:24,188 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 38 [2019-11-23 22:12:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:24,189 INFO L225 Difference]: With dead ends: 45 [2019-11-23 22:12:24,189 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 22:12:24,190 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=82, Invalid=1400, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:12:24,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 22:12:24,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-11-23 22:12:24,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-23 22:12:24,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2019-11-23 22:12:24,195 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2019-11-23 22:12:24,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:24,195 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2019-11-23 22:12:24,195 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 22:12:24,196 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2019-11-23 22:12:24,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-23 22:12:24,196 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:24,196 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:24,399 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:24,400 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:24,400 INFO L82 PathProgramCache]: Analyzing trace with hash 670794418, now seen corresponding path program 17 times [2019-11-23 22:12:24,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:24,400 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646931846] [2019-11-23 22:12:24,400 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:24,410 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:24,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1456404485] [2019-11-23 22:12:24,411 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 [2019-11-23 22:12:24,454 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-23 22:12:24,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:24,455 WARN L253 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 79 conjunts are in the unsatisfiable core [2019-11-23 22:12:24,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:25,280 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:25,329 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:25,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646931846] [2019-11-23 22:12:25,329 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:25,329 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456404485] [2019-11-23 22:12:25,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:25,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2019-11-23 22:12:25,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646066350] [2019-11-23 22:12:25,330 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-23 22:12:25,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:25,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-23 22:12:25,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2019-11-23 22:12:25,332 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 39 states. [2019-11-23 22:12:26,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:26,219 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2019-11-23 22:12:26,219 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-23 22:12:26,219 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 40 [2019-11-23 22:12:26,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:26,220 INFO L225 Difference]: With dead ends: 47 [2019-11-23 22:12:26,220 INFO L226 Difference]: Without dead ends: 43 [2019-11-23 22:12:26,222 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=86, Invalid=1554, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:12:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-11-23 22:12:26,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2019-11-23 22:12:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 22:12:26,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2019-11-23 22:12:26,227 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2019-11-23 22:12:26,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:26,227 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2019-11-23 22:12:26,227 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-23 22:12:26,227 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2019-11-23 22:12:26,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-23 22:12:26,228 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:26,228 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:26,430 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:26,431 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:26,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:26,431 INFO L82 PathProgramCache]: Analyzing trace with hash 441573748, now seen corresponding path program 18 times [2019-11-23 22:12:26,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:26,432 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154421750] [2019-11-23 22:12:26,432 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:26,453 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:26,453 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264937310] [2019-11-23 22:12:26,453 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 [2019-11-23 22:12:26,543 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-23 22:12:26,544 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:26,545 WARN L253 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 83 conjunts are in the unsatisfiable core [2019-11-23 22:12:26,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:27,512 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:27,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154421750] [2019-11-23 22:12:27,555 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:27,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264937310] [2019-11-23 22:12:27,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:27,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2019-11-23 22:12:27,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512744823] [2019-11-23 22:12:27,556 INFO L442 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-11-23 22:12:27,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:27,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-11-23 22:12:27,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2019-11-23 22:12:27,558 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 41 states. [2019-11-23 22:12:28,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:28,749 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2019-11-23 22:12:28,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-11-23 22:12:28,750 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 42 [2019-11-23 22:12:28,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:28,751 INFO L225 Difference]: With dead ends: 49 [2019-11-23 22:12:28,751 INFO L226 Difference]: Without dead ends: 45 [2019-11-23 22:12:28,753 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=90, Invalid=1716, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:12:28,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-11-23 22:12:28,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2019-11-23 22:12:28,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-23 22:12:28,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2019-11-23 22:12:28,758 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2019-11-23 22:12:28,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:28,758 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2019-11-23 22:12:28,758 INFO L463 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-11-23 22:12:28,758 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2019-11-23 22:12:28,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-11-23 22:12:28,759 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:28,759 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:28,962 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:28,963 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:28,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:28,963 INFO L82 PathProgramCache]: Analyzing trace with hash -796158026, now seen corresponding path program 19 times [2019-11-23 22:12:28,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:28,964 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119443988] [2019-11-23 22:12:28,964 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:28,972 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:28,973 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184456170] [2019-11-23 22:12:28,973 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 [2019-11-23 22:12:29,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:29,011 WARN L253 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 87 conjunts are in the unsatisfiable core [2019-11-23 22:12:29,012 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:29,977 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:30,018 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119443988] [2019-11-23 22:12:30,018 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:30,019 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184456170] [2019-11-23 22:12:30,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:30,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2019-11-23 22:12:30,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679006883] [2019-11-23 22:12:30,019 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-23 22:12:30,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:30,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-23 22:12:30,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2019-11-23 22:12:30,021 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 43 states. [2019-11-23 22:12:31,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:31,183 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2019-11-23 22:12:31,184 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 22:12:31,184 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 44 [2019-11-23 22:12:31,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:31,185 INFO L225 Difference]: With dead ends: 51 [2019-11-23 22:12:31,185 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 22:12:31,186 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=94, Invalid=1886, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:12:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 22:12:31,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-11-23 22:12:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-11-23 22:12:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2019-11-23 22:12:31,192 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2019-11-23 22:12:31,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:31,192 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2019-11-23 22:12:31,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-23 22:12:31,193 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2019-11-23 22:12:31,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-11-23 22:12:31,193 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:31,193 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:31,397 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:31,398 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:31,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:31,398 INFO L82 PathProgramCache]: Analyzing trace with hash -550451848, now seen corresponding path program 20 times [2019-11-23 22:12:31,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:31,399 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876394906] [2019-11-23 22:12:31,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:31,408 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:31,410 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042848255] [2019-11-23 22:12:31,410 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 [2019-11-23 22:12:31,456 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:31,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:31,458 WARN L253 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 91 conjunts are in the unsatisfiable core [2019-11-23 22:12:31,459 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:32,447 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:32,489 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:32,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876394906] [2019-11-23 22:12:32,489 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:32,489 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042848255] [2019-11-23 22:12:32,489 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:32,489 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2019-11-23 22:12:32,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085011074] [2019-11-23 22:12:32,490 INFO L442 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-11-23 22:12:32,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:32,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-11-23 22:12:32,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1892, Unknown=0, NotChecked=0, Total=1980 [2019-11-23 22:12:32,491 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 45 states. [2019-11-23 22:12:33,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:33,751 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2019-11-23 22:12:33,753 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 22:12:33,753 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 46 [2019-11-23 22:12:33,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:33,753 INFO L225 Difference]: With dead ends: 53 [2019-11-23 22:12:33,754 INFO L226 Difference]: Without dead ends: 49 [2019-11-23 22:12:33,755 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=98, Invalid=2064, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:12:33,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-11-23 22:12:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2019-11-23 22:12:33,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-23 22:12:33,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2019-11-23 22:12:33,760 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2019-11-23 22:12:33,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:33,760 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2019-11-23 22:12:33,760 INFO L463 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-11-23 22:12:33,760 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2019-11-23 22:12:33,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2019-11-23 22:12:33,761 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:33,761 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:33,964 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:33,964 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:33,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:33,965 INFO L82 PathProgramCache]: Analyzing trace with hash -650016070, now seen corresponding path program 21 times [2019-11-23 22:12:33,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:33,965 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123331091] [2019-11-23 22:12:33,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:33,975 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:33,975 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1817076304] [2019-11-23 22:12:33,975 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 [2019-11-23 22:12:34,105 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-23 22:12:34,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:34,107 WARN L253 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 95 conjunts are in the unsatisfiable core [2019-11-23 22:12:34,109 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:35,219 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:35,264 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:35,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123331091] [2019-11-23 22:12:35,264 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:35,264 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817076304] [2019-11-23 22:12:35,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:35,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2019-11-23 22:12:35,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034444972] [2019-11-23 22:12:35,265 INFO L442 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-11-23 22:12:35,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:35,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-11-23 22:12:35,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2019-11-23 22:12:35,267 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 47 states. [2019-11-23 22:12:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:36,664 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2019-11-23 22:12:36,665 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2019-11-23 22:12:36,665 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 48 [2019-11-23 22:12:36,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:36,666 INFO L225 Difference]: With dead ends: 55 [2019-11-23 22:12:36,666 INFO L226 Difference]: Without dead ends: 51 [2019-11-23 22:12:36,667 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=2250, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:12:36,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-23 22:12:36,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2019-11-23 22:12:36,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-23 22:12:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2019-11-23 22:12:36,674 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2019-11-23 22:12:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:36,674 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2019-11-23 22:12:36,674 INFO L463 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-11-23 22:12:36,674 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2019-11-23 22:12:36,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-23 22:12:36,675 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:36,675 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:36,878 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:36,879 INFO L410 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:36,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:36,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1841952900, now seen corresponding path program 22 times [2019-11-23 22:12:36,880 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:36,880 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047158105] [2019-11-23 22:12:36,881 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:36,892 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:36,892 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67434003] [2019-11-23 22:12:36,892 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 [2019-11-23 22:12:36,960 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:36,961 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:36,963 WARN L253 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 99 conjunts are in the unsatisfiable core [2019-11-23 22:12:36,964 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:38,257 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:38,311 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:38,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047158105] [2019-11-23 22:12:38,311 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:38,311 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67434003] [2019-11-23 22:12:38,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:38,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2019-11-23 22:12:38,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822485114] [2019-11-23 22:12:38,312 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 22:12:38,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:38,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 22:12:38,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2256, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 22:12:38,313 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 49 states. [2019-11-23 22:12:39,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:39,853 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2019-11-23 22:12:39,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 22:12:39,853 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 50 [2019-11-23 22:12:39,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:39,854 INFO L225 Difference]: With dead ends: 57 [2019-11-23 22:12:39,854 INFO L226 Difference]: Without dead ends: 53 [2019-11-23 22:12:39,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=106, Invalid=2444, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:12:39,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-11-23 22:12:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2019-11-23 22:12:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 22:12:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2019-11-23 22:12:39,862 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2019-11-23 22:12:39,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:39,862 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2019-11-23 22:12:39,862 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 22:12:39,862 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2019-11-23 22:12:39,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-23 22:12:39,863 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:39,863 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:40,063 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:40,064 INFO L410 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:40,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:40,065 INFO L82 PathProgramCache]: Analyzing trace with hash -536978498, now seen corresponding path program 23 times [2019-11-23 22:12:40,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:40,065 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050388806] [2019-11-23 22:12:40,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:40,077 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:40,078 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1244553061] [2019-11-23 22:12:40,078 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 [2019-11-23 22:12:40,126 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-23 22:12:40,126 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:40,128 WARN L253 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 103 conjunts are in the unsatisfiable core [2019-11-23 22:12:40,129 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:41,355 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:41,406 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:41,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050388806] [2019-11-23 22:12:41,406 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:41,406 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244553061] [2019-11-23 22:12:41,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:41,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2019-11-23 22:12:41,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39836221] [2019-11-23 22:12:41,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-11-23 22:12:41,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:41,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-11-23 22:12:41,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2450, Unknown=0, NotChecked=0, Total=2550 [2019-11-23 22:12:41,408 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 51 states. [2019-11-23 22:12:43,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:43,016 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2019-11-23 22:12:43,016 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2019-11-23 22:12:43,017 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 52 [2019-11-23 22:12:43,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:43,017 INFO L225 Difference]: With dead ends: 59 [2019-11-23 22:12:43,017 INFO L226 Difference]: Without dead ends: 55 [2019-11-23 22:12:43,018 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=110, Invalid=2646, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 22:12:43,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-23 22:12:43,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2019-11-23 22:12:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 22:12:43,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2019-11-23 22:12:43,023 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2019-11-23 22:12:43,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:43,023 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2019-11-23 22:12:43,023 INFO L463 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-11-23 22:12:43,023 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2019-11-23 22:12:43,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-11-23 22:12:43,024 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:43,024 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:43,227 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:43,227 INFO L410 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:43,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:43,228 INFO L82 PathProgramCache]: Analyzing trace with hash -587028608, now seen corresponding path program 24 times [2019-11-23 22:12:43,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:43,229 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087977044] [2019-11-23 22:12:43,229 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:43,237 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:43,237 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [912735002] [2019-11-23 22:12:43,237 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 [2019-11-23 22:12:43,332 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 22:12:43,332 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:43,335 WARN L253 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 107 conjunts are in the unsatisfiable core [2019-11-23 22:12:43,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:44,640 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:44,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087977044] [2019-11-23 22:12:44,696 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:44,696 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912735002] [2019-11-23 22:12:44,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:44,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2019-11-23 22:12:44,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136744109] [2019-11-23 22:12:44,697 INFO L442 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-11-23 22:12:44,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:44,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-11-23 22:12:44,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2652, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 22:12:44,698 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 53 states. [2019-11-23 22:12:46,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:46,396 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2019-11-23 22:12:46,396 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-11-23 22:12:46,396 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 54 [2019-11-23 22:12:46,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:46,397 INFO L225 Difference]: With dead ends: 61 [2019-11-23 22:12:46,397 INFO L226 Difference]: Without dead ends: 57 [2019-11-23 22:12:46,398 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=114, Invalid=2856, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:12:46,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-11-23 22:12:46,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2019-11-23 22:12:46,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-23 22:12:46,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2019-11-23 22:12:46,402 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2019-11-23 22:12:46,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:46,402 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2019-11-23 22:12:46,403 INFO L463 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-11-23 22:12:46,403 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2019-11-23 22:12:46,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-23 22:12:46,403 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:46,404 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:46,606 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:46,607 INFO L410 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:46,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:46,607 INFO L82 PathProgramCache]: Analyzing trace with hash -1440544062, now seen corresponding path program 25 times [2019-11-23 22:12:46,608 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:46,608 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927995820] [2019-11-23 22:12:46,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:46,616 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:46,616 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1701347648] [2019-11-23 22:12:46,616 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 [2019-11-23 22:12:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:12:46,664 WARN L253 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 111 conjunts are in the unsatisfiable core [2019-11-23 22:12:46,665 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:48,144 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:48,199 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927995820] [2019-11-23 22:12:48,199 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:48,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701347648] [2019-11-23 22:12:48,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:48,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2019-11-23 22:12:48,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936880788] [2019-11-23 22:12:48,200 INFO L442 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-11-23 22:12:48,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:48,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-11-23 22:12:48,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2862, Unknown=0, NotChecked=0, Total=2970 [2019-11-23 22:12:48,201 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 55 states. [2019-11-23 22:12:50,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:50,032 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2019-11-23 22:12:50,032 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2019-11-23 22:12:50,033 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 56 [2019-11-23 22:12:50,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:50,034 INFO L225 Difference]: With dead ends: 63 [2019-11-23 22:12:50,034 INFO L226 Difference]: Without dead ends: 59 [2019-11-23 22:12:50,035 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=118, Invalid=3074, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 22:12:50,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-23 22:12:50,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2019-11-23 22:12:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 22:12:50,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2019-11-23 22:12:50,039 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2019-11-23 22:12:50,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:50,039 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2019-11-23 22:12:50,039 INFO L463 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-11-23 22:12:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2019-11-23 22:12:50,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-23 22:12:50,040 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:50,040 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:50,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:50,243 INFO L410 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:50,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:50,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1330141820, now seen corresponding path program 26 times [2019-11-23 22:12:50,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:50,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815485163] [2019-11-23 22:12:50,245 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:50,253 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:50,253 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933956970] [2019-11-23 22:12:50,254 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 [2019-11-23 22:12:50,301 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:12:50,302 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:50,304 WARN L253 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 115 conjunts are in the unsatisfiable core [2019-11-23 22:12:50,305 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:52,513 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:52,569 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:52,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815485163] [2019-11-23 22:12:52,569 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:52,569 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933956970] [2019-11-23 22:12:52,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:52,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2019-11-23 22:12:52,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629749771] [2019-11-23 22:12:52,570 INFO L442 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-11-23 22:12:52,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:52,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-11-23 22:12:52,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=3080, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 22:12:52,571 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 57 states. [2019-11-23 22:12:54,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:54,546 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2019-11-23 22:12:54,546 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-23 22:12:54,546 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 58 [2019-11-23 22:12:54,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:54,547 INFO L225 Difference]: With dead ends: 65 [2019-11-23 22:12:54,547 INFO L226 Difference]: Without dead ends: 61 [2019-11-23 22:12:54,548 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=122, Invalid=3300, Unknown=0, NotChecked=0, Total=3422 [2019-11-23 22:12:54,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-11-23 22:12:54,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2019-11-23 22:12:54,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-23 22:12:54,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2019-11-23 22:12:54,552 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2019-11-23 22:12:54,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:54,552 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2019-11-23 22:12:54,552 INFO L463 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-11-23 22:12:54,552 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2019-11-23 22:12:54,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2019-11-23 22:12:54,553 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:54,553 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:54,757 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:54,758 INFO L410 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1687197638, now seen corresponding path program 27 times [2019-11-23 22:12:54,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:54,759 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448062157] [2019-11-23 22:12:54,759 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:54,767 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:54,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892091287] [2019-11-23 22:12:54,768 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 [2019-11-23 22:12:55,070 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-11-23 22:12:55,070 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:55,074 WARN L253 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 119 conjunts are in the unsatisfiable core [2019-11-23 22:12:55,075 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:12:56,786 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:12:56,854 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:12:56,854 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448062157] [2019-11-23 22:12:56,854 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:12:56,855 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892091287] [2019-11-23 22:12:56,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:12:56,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2019-11-23 22:12:56,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739667629] [2019-11-23 22:12:56,855 INFO L442 AbstractCegarLoop]: Interpolant automaton has 59 states [2019-11-23 22:12:56,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:12:56,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2019-11-23 22:12:56,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3306, Unknown=0, NotChecked=0, Total=3422 [2019-11-23 22:12:56,856 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 59 states. [2019-11-23 22:12:58,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:12:58,973 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2019-11-23 22:12:58,973 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2019-11-23 22:12:58,973 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 60 [2019-11-23 22:12:58,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:12:58,974 INFO L225 Difference]: With dead ends: 67 [2019-11-23 22:12:58,974 INFO L226 Difference]: Without dead ends: 63 [2019-11-23 22:12:58,975 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=126, Invalid=3534, Unknown=0, NotChecked=0, Total=3660 [2019-11-23 22:12:58,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-23 22:12:58,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2019-11-23 22:12:58,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-11-23 22:12:58,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2019-11-23 22:12:58,980 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2019-11-23 22:12:58,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:12:58,985 INFO L462 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2019-11-23 22:12:58,985 INFO L463 AbstractCegarLoop]: Interpolant automaton has 59 states. [2019-11-23 22:12:58,985 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2019-11-23 22:12:58,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-11-23 22:12:58,986 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:12:58,986 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2019-11-23 22:12:59,189 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:12:59,190 INFO L410 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:12:59,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:12:59,190 INFO L82 PathProgramCache]: Analyzing trace with hash -2047475320, now seen corresponding path program 28 times [2019-11-23 22:12:59,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:12:59,190 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771092371] [2019-11-23 22:12:59,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:12:59,197 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:12:59,197 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802945847] [2019-11-23 22:12:59,197 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 [2019-11-23 22:12:59,274 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:12:59,275 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:12:59,277 WARN L253 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 123 conjunts are in the unsatisfiable core [2019-11-23 22:12:59,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:01,362 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:01,436 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:01,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771092371] [2019-11-23 22:13:01,436 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:01,436 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802945847] [2019-11-23 22:13:01,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:01,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2019-11-23 22:13:01,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875656444] [2019-11-23 22:13:01,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-11-23 22:13:01,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:01,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-11-23 22:13:01,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2019-11-23 22:13:01,438 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 61 states. [2019-11-23 22:13:03,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:03,779 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2019-11-23 22:13:03,779 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-11-23 22:13:03,780 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 62 [2019-11-23 22:13:03,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:03,780 INFO L225 Difference]: With dead ends: 69 [2019-11-23 22:13:03,780 INFO L226 Difference]: Without dead ends: 65 [2019-11-23 22:13:03,781 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=130, Invalid=3776, Unknown=0, NotChecked=0, Total=3906 [2019-11-23 22:13:03,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-11-23 22:13:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2019-11-23 22:13:03,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-23 22:13:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2019-11-23 22:13:03,785 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2019-11-23 22:13:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:03,785 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2019-11-23 22:13:03,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-11-23 22:13:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2019-11-23 22:13:03,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-11-23 22:13:03,786 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:03,786 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:03,986 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:03,987 INFO L410 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:03,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:03,987 INFO L82 PathProgramCache]: Analyzing trace with hash -475528502, now seen corresponding path program 29 times [2019-11-23 22:13:03,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:03,988 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079070218] [2019-11-23 22:13:03,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:03,998 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:03,998 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1855424864] [2019-11-23 22:13:03,999 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 [2019-11-23 22:13:04,066 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-23 22:13:04,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:04,068 WARN L253 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 127 conjunts are in the unsatisfiable core [2019-11-23 22:13:04,069 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:05,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:06,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079070218] [2019-11-23 22:13:06,041 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:06,041 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855424864] [2019-11-23 22:13:06,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:06,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2019-11-23 22:13:06,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383215235] [2019-11-23 22:13:06,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 63 states [2019-11-23 22:13:06,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:06,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2019-11-23 22:13:06,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2019-11-23 22:13:06,043 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 63 states. [2019-11-23 22:13:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:08,498 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2019-11-23 22:13:08,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2019-11-23 22:13:08,499 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 64 [2019-11-23 22:13:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:08,500 INFO L225 Difference]: With dead ends: 71 [2019-11-23 22:13:08,500 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 22:13:08,501 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=134, Invalid=4026, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 22:13:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 22:13:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2019-11-23 22:13:08,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-23 22:13:08,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2019-11-23 22:13:08,506 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2019-11-23 22:13:08,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:08,506 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2019-11-23 22:13:08,506 INFO L463 AbstractCegarLoop]: Interpolant automaton has 63 states. [2019-11-23 22:13:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2019-11-23 22:13:08,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-23 22:13:08,507 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:08,507 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:08,710 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:08,711 INFO L410 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:08,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:08,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1663124596, now seen corresponding path program 30 times [2019-11-23 22:13:08,712 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:08,712 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537196945] [2019-11-23 22:13:08,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:08,720 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:08,720 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055617526] [2019-11-23 22:13:08,720 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2019-11-23 22:13:08,919 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-11-23 22:13:08,919 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:08,923 WARN L253 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 131 conjunts are in the unsatisfiable core [2019-11-23 22:13:08,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:10,981 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:11,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537196945] [2019-11-23 22:13:11,044 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:11,044 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055617526] [2019-11-23 22:13:11,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:11,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2019-11-23 22:13:11,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676220863] [2019-11-23 22:13:11,045 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-11-23 22:13:11,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:11,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-11-23 22:13:11,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=4032, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 22:13:11,046 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 65 states. [2019-11-23 22:13:13,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:13,708 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2019-11-23 22:13:13,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-11-23 22:13:13,709 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 66 [2019-11-23 22:13:13,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:13,709 INFO L225 Difference]: With dead ends: 73 [2019-11-23 22:13:13,709 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 22:13:13,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=138, Invalid=4284, Unknown=0, NotChecked=0, Total=4422 [2019-11-23 22:13:13,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 22:13:13,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2019-11-23 22:13:13,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-23 22:13:13,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2019-11-23 22:13:13,714 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2019-11-23 22:13:13,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:13,715 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2019-11-23 22:13:13,715 INFO L463 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-11-23 22:13:13,715 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2019-11-23 22:13:13,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2019-11-23 22:13:13,715 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:13,715 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:13,919 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:13,920 INFO L410 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:13,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:13,920 INFO L82 PathProgramCache]: Analyzing trace with hash -481670194, now seen corresponding path program 31 times [2019-11-23 22:13:13,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:13,921 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095553430] [2019-11-23 22:13:13,921 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:13,929 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:13,929 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [365978143] [2019-11-23 22:13:13,929 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 [2019-11-23 22:13:13,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 22:13:13,998 WARN L253 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 135 conjunts are in the unsatisfiable core [2019-11-23 22:13:14,001 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:16,167 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:16,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095553430] [2019-11-23 22:13:16,235 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:16,235 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365978143] [2019-11-23 22:13:16,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:16,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2019-11-23 22:13:16,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919941357] [2019-11-23 22:13:16,236 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-11-23 22:13:16,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:16,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-11-23 22:13:16,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2019-11-23 22:13:16,237 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 67 states. [2019-11-23 22:13:19,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:19,097 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2019-11-23 22:13:19,097 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2019-11-23 22:13:19,097 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 68 [2019-11-23 22:13:19,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:19,098 INFO L225 Difference]: With dead ends: 75 [2019-11-23 22:13:19,098 INFO L226 Difference]: Without dead ends: 71 [2019-11-23 22:13:19,098 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=142, Invalid=4550, Unknown=0, NotChecked=0, Total=4692 [2019-11-23 22:13:19,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-23 22:13:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2019-11-23 22:13:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-23 22:13:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2019-11-23 22:13:19,103 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2019-11-23 22:13:19,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:19,104 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2019-11-23 22:13:19,104 INFO L463 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-11-23 22:13:19,104 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2019-11-23 22:13:19,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-11-23 22:13:19,104 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:19,105 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:19,308 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:19,308 INFO L410 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:19,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:19,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1024643984, now seen corresponding path program 32 times [2019-11-23 22:13:19,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:19,308 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090195958] [2019-11-23 22:13:19,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:19,315 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:19,316 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184399563] [2019-11-23 22:13:19,316 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 [2019-11-23 22:13:19,378 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 22:13:19,378 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:19,380 WARN L253 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 139 conjunts are in the unsatisfiable core [2019-11-23 22:13:19,381 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:21,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:21,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090195958] [2019-11-23 22:13:21,718 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:21,718 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184399563] [2019-11-23 22:13:21,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:21,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2019-11-23 22:13:21,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498359092] [2019-11-23 22:13:21,719 INFO L442 AbstractCegarLoop]: Interpolant automaton has 69 states [2019-11-23 22:13:21,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:21,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2019-11-23 22:13:21,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4556, Unknown=0, NotChecked=0, Total=4692 [2019-11-23 22:13:21,720 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 69 states. [2019-11-23 22:13:24,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:24,636 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2019-11-23 22:13:24,636 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2019-11-23 22:13:24,636 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 70 [2019-11-23 22:13:24,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:24,637 INFO L225 Difference]: With dead ends: 77 [2019-11-23 22:13:24,637 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 22:13:24,638 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=146, Invalid=4824, Unknown=0, NotChecked=0, Total=4970 [2019-11-23 22:13:24,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 22:13:24,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2019-11-23 22:13:24,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-23 22:13:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2019-11-23 22:13:24,642 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2019-11-23 22:13:24,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:24,643 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2019-11-23 22:13:24,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 69 states. [2019-11-23 22:13:24,643 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2019-11-23 22:13:24,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-11-23 22:13:24,643 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:24,643 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:24,847 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:24,847 INFO L410 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:24,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:24,848 INFO L82 PathProgramCache]: Analyzing trace with hash 1188590290, now seen corresponding path program 33 times [2019-11-23 22:13:24,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:24,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908651846] [2019-11-23 22:13:24,849 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:24,857 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:24,857 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [922452925] [2019-11-23 22:13:24,857 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 [2019-11-23 22:13:25,454 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2019-11-23 22:13:25,454 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:25,456 WARN L253 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 143 conjunts are in the unsatisfiable core [2019-11-23 22:13:25,465 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:27,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:27,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:27,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908651846] [2019-11-23 22:13:27,939 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:27,939 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [922452925] [2019-11-23 22:13:27,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:27,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2019-11-23 22:13:27,940 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662712985] [2019-11-23 22:13:27,940 INFO L442 AbstractCegarLoop]: Interpolant automaton has 71 states [2019-11-23 22:13:27,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:27,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2019-11-23 22:13:27,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4830, Unknown=0, NotChecked=0, Total=4970 [2019-11-23 22:13:27,941 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 71 states. [2019-11-23 22:13:30,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:30,956 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2019-11-23 22:13:30,956 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2019-11-23 22:13:30,956 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 72 [2019-11-23 22:13:30,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:30,957 INFO L225 Difference]: With dead ends: 79 [2019-11-23 22:13:30,957 INFO L226 Difference]: Without dead ends: 75 [2019-11-23 22:13:30,957 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=150, Invalid=5106, Unknown=0, NotChecked=0, Total=5256 [2019-11-23 22:13:30,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2019-11-23 22:13:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2019-11-23 22:13:30,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-11-23 22:13:30,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2019-11-23 22:13:30,962 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2019-11-23 22:13:30,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:30,962 INFO L462 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2019-11-23 22:13:30,962 INFO L463 AbstractCegarLoop]: Interpolant automaton has 71 states. [2019-11-23 22:13:30,963 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2019-11-23 22:13:30,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-23 22:13:30,963 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:30,963 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:31,165 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:31,165 INFO L410 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:31,166 INFO L82 PathProgramCache]: Analyzing trace with hash -172799596, now seen corresponding path program 34 times [2019-11-23 22:13:31,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:31,167 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116362086] [2019-11-23 22:13:31,167 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:31,176 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:31,176 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [210715658] [2019-11-23 22:13:31,177 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 [2019-11-23 22:13:31,237 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 22:13:31,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:31,239 WARN L253 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 147 conjunts are in the unsatisfiable core [2019-11-23 22:13:31,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:33,695 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:33,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:33,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116362086] [2019-11-23 22:13:33,768 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:33,768 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210715658] [2019-11-23 22:13:33,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:33,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2019-11-23 22:13:33,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51186966] [2019-11-23 22:13:33,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 73 states [2019-11-23 22:13:33,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:33,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2019-11-23 22:13:33,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=5112, Unknown=0, NotChecked=0, Total=5256 [2019-11-23 22:13:33,769 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 73 states. [2019-11-23 22:13:36,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:36,909 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2019-11-23 22:13:36,909 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2019-11-23 22:13:36,910 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 74 [2019-11-23 22:13:36,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:36,911 INFO L225 Difference]: With dead ends: 81 [2019-11-23 22:13:36,911 INFO L226 Difference]: Without dead ends: 77 [2019-11-23 22:13:36,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=154, Invalid=5396, Unknown=0, NotChecked=0, Total=5550 [2019-11-23 22:13:36,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-11-23 22:13:36,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2019-11-23 22:13:36,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 22:13:36,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2019-11-23 22:13:36,916 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2019-11-23 22:13:36,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:36,916 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2019-11-23 22:13:36,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 73 states. [2019-11-23 22:13:36,916 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2019-11-23 22:13:36,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-23 22:13:36,917 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:36,917 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:37,117 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:37,118 INFO L410 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:37,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:37,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1496545238, now seen corresponding path program 35 times [2019-11-23 22:13:37,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:37,119 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753000480] [2019-11-23 22:13:37,119 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:37,130 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:37,130 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1609487446] [2019-11-23 22:13:37,130 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 [2019-11-23 22:13:37,233 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-23 22:13:37,233 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:37,236 WARN L253 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 151 conjunts are in the unsatisfiable core [2019-11-23 22:13:37,238 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:40,089 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:40,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753000480] [2019-11-23 22:13:40,168 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:40,168 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609487446] [2019-11-23 22:13:40,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:40,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2019-11-23 22:13:40,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646720364] [2019-11-23 22:13:40,169 INFO L442 AbstractCegarLoop]: Interpolant automaton has 75 states [2019-11-23 22:13:40,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:40,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2019-11-23 22:13:40,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=5402, Unknown=0, NotChecked=0, Total=5550 [2019-11-23 22:13:40,170 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 75 states. [2019-11-23 22:13:43,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 22:13:43,625 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2019-11-23 22:13:43,626 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2019-11-23 22:13:43,626 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 76 [2019-11-23 22:13:43,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 22:13:43,626 INFO L225 Difference]: With dead ends: 83 [2019-11-23 22:13:43,626 INFO L226 Difference]: Without dead ends: 79 [2019-11-23 22:13:43,627 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=158, Invalid=5694, Unknown=0, NotChecked=0, Total=5852 [2019-11-23 22:13:43,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-23 22:13:43,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2019-11-23 22:13:43,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-23 22:13:43,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2019-11-23 22:13:43,632 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2019-11-23 22:13:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 22:13:43,633 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2019-11-23 22:13:43,633 INFO L463 AbstractCegarLoop]: Interpolant automaton has 75 states. [2019-11-23 22:13:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2019-11-23 22:13:43,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-23 22:13:43,633 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 22:13:43,634 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2019-11-23 22:13:43,837 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 22:13:43,837 INFO L410 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 22:13:43,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 22:13:43,838 INFO L82 PathProgramCache]: Analyzing trace with hash -580837992, now seen corresponding path program 36 times [2019-11-23 22:13:43,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 22:13:43,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434537087] [2019-11-23 22:13:43,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 22:13:43,848 ERROR L271 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2019-11-23 22:13:43,848 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1751999370] [2019-11-23 22:13:43,848 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 [2019-11-23 22:13:44,118 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2019-11-23 22:13:44,118 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 22:13:44,122 WARN L253 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 155 conjunts are in the unsatisfiable core [2019-11-23 22:13:44,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 22:13:46,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 22:13:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 22:13:46,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434537087] [2019-11-23 22:13:46,969 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-23 22:13:46,969 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751999370] [2019-11-23 22:13:46,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2019-11-23 22:13:46,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2019-11-23 22:13:46,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287385835] [2019-11-23 22:13:46,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 77 states [2019-11-23 22:13:46,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 22:13:46,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2019-11-23 22:13:46,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5700, Unknown=0, NotChecked=0, Total=5852 [2019-11-23 22:13:46,971 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 77 states.