/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:20:27,944 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:20:27,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:20:27,966 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:20:27,966 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:20:27,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:20:27,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:20:27,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:20:27,985 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:20:27,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:20:27,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:20:27,992 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:20:27,992 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:20:27,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:20:27,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:20:27,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:20:28,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:20:28,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:20:28,002 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:20:28,007 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:20:28,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:20:28,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:20:28,018 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:20:28,019 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:20:28,022 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:20:28,027 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:20:28,028 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:20:28,029 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:20:28,031 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:20:28,032 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:20:28,032 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:20:28,033 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:20:28,033 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:20:28,034 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:20:28,034 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:20:28,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:20:28,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-23 20:20:28,074 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:20:28,074 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:20:28,076 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:20:28,079 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:20:28,079 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:20:28,079 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:20:28,080 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:20:28,080 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:20:28,080 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:20:28,080 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:20:28,080 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:20:28,080 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:20:28,081 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:20:28,081 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:20:28,081 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:20:28,081 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:20:28,081 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:20:28,081 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:20:28,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:20:28,084 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:20:28,084 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:20:28,084 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:20:28,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:20:28,084 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:20:28,085 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:20:28,085 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:20:28,085 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:20:28,085 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:20:28,085 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:20:28,085 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:20:28,364 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:20:28,380 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:20:28,384 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:20:28,386 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:20:28,387 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:20:28,388 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-11-23 20:20:28,465 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9591872f6/d16b07a04e0a4f838e4afd7ef0631ccc/FLAGdbffc20d3 [2019-11-23 20:20:28,913 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:20:28,914 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_allDiff2_ground.i [2019-11-23 20:20:28,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9591872f6/d16b07a04e0a4f838e4afd7ef0631ccc/FLAGdbffc20d3 [2019-11-23 20:20:29,281 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9591872f6/d16b07a04e0a4f838e4afd7ef0631ccc [2019-11-23 20:20:29,289 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:20:29,290 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:20:29,291 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:20:29,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:20:29,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:20:29,296 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:20:29" (1/1) ... [2019-11-23 20:20:29,299 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f808c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:29, skipping insertion in model container [2019-11-23 20:20:29,299 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:20:29" (1/1) ... [2019-11-23 20:20:29,307 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:20:29,325 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:20:29,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:20:29,565 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:20:29,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:20:29,626 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:20:29,626 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:29 WrapperNode [2019-11-23 20:20:29,627 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:20:29,627 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:20:29,628 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:20:29,628 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:20:29,637 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:29" (1/1) ... [2019-11-23 20:20:29,735 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:29" (1/1) ... [2019-11-23 20:20:29,754 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:20:29,755 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:20:29,755 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:20:29,755 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:20:29,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:29" (1/1) ... [2019-11-23 20:20:29,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:29" (1/1) ... [2019-11-23 20:20:29,767 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:29" (1/1) ... [2019-11-23 20:20:29,767 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:29" (1/1) ... [2019-11-23 20:20:29,773 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:29" (1/1) ... [2019-11-23 20:20:29,778 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:29" (1/1) ... [2019-11-23 20:20:29,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:29" (1/1) ... [2019-11-23 20:20:29,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:20:29,782 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:20:29,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:20:29,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:20:29,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:20:29,842 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:20:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:20:29,844 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:20:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:20:29,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:20:29,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:20:30,100 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:20:30,100 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 20:20:30,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:20:30 BoogieIcfgContainer [2019-11-23 20:20:30,103 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:20:30,104 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:20:30,105 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:20:30,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:20:30,108 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:20:29" (1/3) ... [2019-11-23 20:20:30,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee7a285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:20:30, skipping insertion in model container [2019-11-23 20:20:30,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:20:29" (2/3) ... [2019-11-23 20:20:30,110 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ee7a285 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:20:30, skipping insertion in model container [2019-11-23 20:20:30,110 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:20:30" (3/3) ... [2019-11-23 20:20:30,112 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_allDiff2_ground.i [2019-11-23 20:20:30,124 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:20:30,134 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:20:30,149 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:20:30,181 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:20:30,181 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:20:30,182 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:20:30,182 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:20:30,182 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:20:30,182 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:20:30,182 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:20:30,183 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:20:30,201 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2019-11-23 20:20:30,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-23 20:20:30,207 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:30,208 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:30,209 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:30,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:30,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1932701392, now seen corresponding path program 1 times [2019-11-23 20:20:30,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:30,226 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394828254] [2019-11-23 20:20:30,226 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:30,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:20:30,376 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394828254] [2019-11-23 20:20:30,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:30,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:20:30,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287397673] [2019-11-23 20:20:30,383 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:20:30,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:30,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:20:30,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:30,399 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2019-11-23 20:20:30,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:30,453 INFO L93 Difference]: Finished difference Result 44 states and 68 transitions. [2019-11-23 20:20:30,454 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:20:30,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-11-23 20:20:30,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:30,463 INFO L225 Difference]: With dead ends: 44 [2019-11-23 20:20:30,464 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:20:30,467 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:20:30,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:20:30,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2019-11-23 20:20:30,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-23 20:20:30,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2019-11-23 20:20:30,499 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2019-11-23 20:20:30,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:30,499 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2019-11-23 20:20:30,499 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:20:30,500 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2019-11-23 20:20:30,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2019-11-23 20:20:30,500 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:30,501 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:30,501 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:30,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:30,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1277503826, now seen corresponding path program 1 times [2019-11-23 20:20:30,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:30,502 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414819310] [2019-11-23 20:20:30,502 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:30,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:30,555 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414819310] [2019-11-23 20:20:30,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:30,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:20:30,556 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920100854] [2019-11-23 20:20:30,558 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:20:30,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:30,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:20:30,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:20:30,559 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand 4 states. [2019-11-23 20:20:30,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:30,627 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2019-11-23 20:20:30,628 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:20:30,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2019-11-23 20:20:30,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:30,629 INFO L225 Difference]: With dead ends: 34 [2019-11-23 20:20:30,629 INFO L226 Difference]: Without dead ends: 25 [2019-11-23 20:20:30,630 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:20:30,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-11-23 20:20:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2019-11-23 20:20:30,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:20:30,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2019-11-23 20:20:30,636 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 12 [2019-11-23 20:20:30,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:30,637 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2019-11-23 20:20:30,637 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:20:30,637 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2019-11-23 20:20:30,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:20:30,638 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:30,638 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:30,638 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:30,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:30,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1548598205, now seen corresponding path program 1 times [2019-11-23 20:20:30,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:30,640 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378468075] [2019-11-23 20:20:30,640 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:30,737 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:20:30,737 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378468075] [2019-11-23 20:20:30,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:20:30,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-23 20:20:30,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889419536] [2019-11-23 20:20:30,739 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:20:30,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:30,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:20:30,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:20:30,740 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand 5 states. [2019-11-23 20:20:30,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:30,864 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2019-11-23 20:20:30,864 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:20:30,865 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2019-11-23 20:20:30,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:30,866 INFO L225 Difference]: With dead ends: 50 [2019-11-23 20:20:30,866 INFO L226 Difference]: Without dead ends: 34 [2019-11-23 20:20:30,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:20:30,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-23 20:20:30,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 25. [2019-11-23 20:20:30,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-23 20:20:30,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2019-11-23 20:20:30,873 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 15 [2019-11-23 20:20:30,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:30,873 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2019-11-23 20:20:30,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:20:30,874 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2019-11-23 20:20:30,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-23 20:20:30,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:30,875 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:30,875 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:30,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:30,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1546796147, now seen corresponding path program 1 times [2019-11-23 20:20:30,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:30,876 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957111709] [2019-11-23 20:20:30,876 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:20:30,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957111709] [2019-11-23 20:20:30,983 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454812156] [2019-11-23 20:20:30,984 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:31,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:31,047 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:20:31,054 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:31,117 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:20:31,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:31,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 10 [2019-11-23 20:20:31,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727883428] [2019-11-23 20:20:31,121 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:20:31,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:31,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:20:31,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:20:31,123 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 10 states. [2019-11-23 20:20:31,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:31,414 INFO L93 Difference]: Finished difference Result 74 states and 99 transitions. [2019-11-23 20:20:31,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:20:31,415 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-11-23 20:20:31,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:31,418 INFO L225 Difference]: With dead ends: 74 [2019-11-23 20:20:31,418 INFO L226 Difference]: Without dead ends: 54 [2019-11-23 20:20:31,419 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:20:31,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-23 20:20:31,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 34. [2019-11-23 20:20:31,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2019-11-23 20:20:31,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 44 transitions. [2019-11-23 20:20:31,431 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 44 transitions. Word has length 20 [2019-11-23 20:20:31,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:31,432 INFO L462 AbstractCegarLoop]: Abstraction has 34 states and 44 transitions. [2019-11-23 20:20:31,432 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:20:31,432 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 44 transitions. [2019-11-23 20:20:31,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-11-23 20:20:31,433 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:31,433 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:31,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:31,640 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:31,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:31,640 INFO L82 PathProgramCache]: Analyzing trace with hash 687795318, now seen corresponding path program 2 times [2019-11-23 20:20:31,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:31,641 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055856746] [2019-11-23 20:20:31,642 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:31,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:31,851 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:20:31,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055856746] [2019-11-23 20:20:31,851 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009908240] [2019-11-23 20:20:31,852 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:31,915 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:31,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:31,918 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:20:31,920 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:20:31,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:31,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 12 [2019-11-23 20:20:31,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109497553] [2019-11-23 20:20:31,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:20:31,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:31,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:20:31,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:20:31,950 INFO L87 Difference]: Start difference. First operand 34 states and 44 transitions. Second operand 12 states. [2019-11-23 20:20:32,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:32,297 INFO L93 Difference]: Finished difference Result 137 states and 188 transitions. [2019-11-23 20:20:32,299 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:20:32,299 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2019-11-23 20:20:32,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:32,301 INFO L225 Difference]: With dead ends: 137 [2019-11-23 20:20:32,301 INFO L226 Difference]: Without dead ends: 112 [2019-11-23 20:20:32,304 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:20:32,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2019-11-23 20:20:32,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 55. [2019-11-23 20:20:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-11-23 20:20:32,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 76 transitions. [2019-11-23 20:20:32,329 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 76 transitions. Word has length 28 [2019-11-23 20:20:32,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:32,329 INFO L462 AbstractCegarLoop]: Abstraction has 55 states and 76 transitions. [2019-11-23 20:20:32,329 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:20:32,330 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 76 transitions. [2019-11-23 20:20:32,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2019-11-23 20:20:32,334 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:32,334 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:32,538 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:32,538 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:32,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:32,539 INFO L82 PathProgramCache]: Analyzing trace with hash -769295944, now seen corresponding path program 1 times [2019-11-23 20:20:32,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:32,541 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903748043] [2019-11-23 20:20:32,541 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:32,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:32,688 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-11-23 20:20:32,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903748043] [2019-11-23 20:20:32,689 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028288035] [2019-11-23 20:20:32,690 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:32,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:32,739 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:20:32,741 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:32,799 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:20:32,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:32,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2019-11-23 20:20:32,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988056405] [2019-11-23 20:20:32,801 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:20:32,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:32,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:20:32,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:20:32,802 INFO L87 Difference]: Start difference. First operand 55 states and 76 transitions. Second operand 12 states. [2019-11-23 20:20:33,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:33,097 INFO L93 Difference]: Finished difference Result 170 states and 240 transitions. [2019-11-23 20:20:33,098 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:20:33,098 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 30 [2019-11-23 20:20:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:33,099 INFO L225 Difference]: With dead ends: 170 [2019-11-23 20:20:33,099 INFO L226 Difference]: Without dead ends: 126 [2019-11-23 20:20:33,101 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:20:33,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2019-11-23 20:20:33,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 43. [2019-11-23 20:20:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-11-23 20:20:33,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 56 transitions. [2019-11-23 20:20:33,118 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 56 transitions. Word has length 30 [2019-11-23 20:20:33,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:33,119 INFO L462 AbstractCegarLoop]: Abstraction has 43 states and 56 transitions. [2019-11-23 20:20:33,119 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:20:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 56 transitions. [2019-11-23 20:20:33,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:20:33,121 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:33,121 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:33,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:33,325 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:33,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:33,326 INFO L82 PathProgramCache]: Analyzing trace with hash -843314852, now seen corresponding path program 3 times [2019-11-23 20:20:33,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:33,326 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211000041] [2019-11-23 20:20:33,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:33,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 20:20:33,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211000041] [2019-11-23 20:20:33,474 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2152122] [2019-11-23 20:20:33,474 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 20:20:33,532 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:20:33,532 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:33,533 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:20:33,538 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:33,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:20:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-23 20:20:33,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:33,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 13 [2019-11-23 20:20:33,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997404465] [2019-11-23 20:20:33,580 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:20:33,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:33,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:20:33,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:20:33,581 INFO L87 Difference]: Start difference. First operand 43 states and 56 transitions. Second operand 13 states. [2019-11-23 20:20:34,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:34,067 INFO L93 Difference]: Finished difference Result 148 states and 209 transitions. [2019-11-23 20:20:34,068 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-23 20:20:34,068 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 35 [2019-11-23 20:20:34,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:34,069 INFO L225 Difference]: With dead ends: 148 [2019-11-23 20:20:34,069 INFO L226 Difference]: Without dead ends: 139 [2019-11-23 20:20:34,070 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:20:34,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-23 20:20:34,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 77. [2019-11-23 20:20:34,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 20:20:34,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 109 transitions. [2019-11-23 20:20:34,102 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 109 transitions. Word has length 35 [2019-11-23 20:20:34,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:34,103 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 109 transitions. [2019-11-23 20:20:34,103 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:20:34,104 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 109 transitions. [2019-11-23 20:20:34,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-23 20:20:34,105 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:34,105 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:34,310 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:34,310 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1806327773, now seen corresponding path program 1 times [2019-11-23 20:20:34,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:34,311 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308568043] [2019-11-23 20:20:34,311 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:34,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 20:20:34,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308568043] [2019-11-23 20:20:34,409 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110588225] [2019-11-23 20:20:34,409 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:34,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:34,461 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-23 20:20:34,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-11-23 20:20:34,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:34,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2019-11-23 20:20:34,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598618369] [2019-11-23 20:20:34,504 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-23 20:20:34,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:34,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-23 20:20:34,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2019-11-23 20:20:34,506 INFO L87 Difference]: Start difference. First operand 77 states and 109 transitions. Second operand 12 states. [2019-11-23 20:20:34,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:34,829 INFO L93 Difference]: Finished difference Result 358 states and 526 transitions. [2019-11-23 20:20:34,829 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-23 20:20:34,829 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 38 [2019-11-23 20:20:34,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:34,831 INFO L225 Difference]: With dead ends: 358 [2019-11-23 20:20:34,831 INFO L226 Difference]: Without dead ends: 294 [2019-11-23 20:20:34,832 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:20:34,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-11-23 20:20:34,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 85. [2019-11-23 20:20:34,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-11-23 20:20:34,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 120 transitions. [2019-11-23 20:20:34,846 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 120 transitions. Word has length 38 [2019-11-23 20:20:34,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:34,846 INFO L462 AbstractCegarLoop]: Abstraction has 85 states and 120 transitions. [2019-11-23 20:20:34,846 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-23 20:20:34,846 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 120 transitions. [2019-11-23 20:20:34,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:20:34,848 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:34,848 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:35,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:35,054 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:35,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:35,055 INFO L82 PathProgramCache]: Analyzing trace with hash 822228805, now seen corresponding path program 2 times [2019-11-23 20:20:35,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:35,056 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374323062] [2019-11-23 20:20:35,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:35,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:35,219 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 20:20:35,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374323062] [2019-11-23 20:20:35,220 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266388161] [2019-11-23 20:20:35,220 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:35,283 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:35,283 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:35,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:20:35,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:35,463 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-11-23 20:20:35,463 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:35,463 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2019-11-23 20:20:35,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439477183] [2019-11-23 20:20:35,465 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-23 20:20:35,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:35,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-23 20:20:35,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2019-11-23 20:20:35,466 INFO L87 Difference]: Start difference. First operand 85 states and 120 transitions. Second operand 17 states. [2019-11-23 20:20:36,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:36,494 INFO L93 Difference]: Finished difference Result 442 states and 658 transitions. [2019-11-23 20:20:36,500 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-11-23 20:20:36,500 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2019-11-23 20:20:36,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:36,502 INFO L225 Difference]: With dead ends: 442 [2019-11-23 20:20:36,502 INFO L226 Difference]: Without dead ends: 261 [2019-11-23 20:20:36,505 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=716, Invalid=2040, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 20:20:36,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2019-11-23 20:20:36,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 97. [2019-11-23 20:20:36,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-23 20:20:36,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 123 transitions. [2019-11-23 20:20:36,520 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 123 transitions. Word has length 43 [2019-11-23 20:20:36,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:36,520 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 123 transitions. [2019-11-23 20:20:36,520 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-23 20:20:36,521 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 123 transitions. [2019-11-23 20:20:36,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:20:36,522 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:36,523 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:36,729 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:36,730 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:36,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:36,730 INFO L82 PathProgramCache]: Analyzing trace with hash 2091355498, now seen corresponding path program 4 times [2019-11-23 20:20:36,730 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:36,731 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519112637] [2019-11-23 20:20:36,731 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:36,867 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-11-23 20:20:36,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519112637] [2019-11-23 20:20:36,868 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176783127] [2019-11-23 20:20:36,868 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:36,918 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:20:36,918 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:36,919 INFO L255 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:20:36,921 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:37,014 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2019-11-23 20:20:37,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:37,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2019-11-23 20:20:37,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521947631] [2019-11-23 20:20:37,015 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-23 20:20:37,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:37,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-23 20:20:37,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2019-11-23 20:20:37,016 INFO L87 Difference]: Start difference. First operand 97 states and 123 transitions. Second operand 18 states. [2019-11-23 20:20:37,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:37,953 INFO L93 Difference]: Finished difference Result 338 states and 460 transitions. [2019-11-23 20:20:37,953 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:20:37,954 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2019-11-23 20:20:37,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:37,956 INFO L225 Difference]: With dead ends: 338 [2019-11-23 20:20:37,957 INFO L226 Difference]: Without dead ends: 258 [2019-11-23 20:20:37,959 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 570 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=734, Invalid=1716, Unknown=0, NotChecked=0, Total=2450 [2019-11-23 20:20:37,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-11-23 20:20:37,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 106. [2019-11-23 20:20:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2019-11-23 20:20:37,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 139 transitions. [2019-11-23 20:20:37,976 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 139 transitions. Word has length 57 [2019-11-23 20:20:37,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:37,976 INFO L462 AbstractCegarLoop]: Abstraction has 106 states and 139 transitions. [2019-11-23 20:20:37,976 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-23 20:20:37,976 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 139 transitions. [2019-11-23 20:20:37,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2019-11-23 20:20:37,978 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:37,978 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 18, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:38,191 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:38,191 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:38,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:38,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1773189261, now seen corresponding path program 5 times [2019-11-23 20:20:38,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:38,193 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811479872] [2019-11-23 20:20:38,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:38,596 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 119 proven. 507 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2019-11-23 20:20:38,596 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811479872] [2019-11-23 20:20:38,597 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387621851] [2019-11-23 20:20:38,597 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:38,647 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-23 20:20:38,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:38,648 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:20:38,652 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:38,783 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:20:38,808 INFO L134 CoverageAnalysis]: Checked inductivity of 719 backedges. 436 proven. 55 refuted. 0 times theorem prover too weak. 228 trivial. 0 not checked. [2019-11-23 20:20:38,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:38,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 12] total 37 [2019-11-23 20:20:38,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258539645] [2019-11-23 20:20:38,810 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-23 20:20:38,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:38,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-23 20:20:38,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1190, Unknown=0, NotChecked=0, Total=1332 [2019-11-23 20:20:38,811 INFO L87 Difference]: Start difference. First operand 106 states and 139 transitions. Second operand 37 states. [2019-11-23 20:20:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:42,839 INFO L93 Difference]: Finished difference Result 503 states and 722 transitions. [2019-11-23 20:20:42,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2019-11-23 20:20:42,842 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 101 [2019-11-23 20:20:42,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:42,844 INFO L225 Difference]: With dead ends: 503 [2019-11-23 20:20:42,844 INFO L226 Difference]: Without dead ends: 413 [2019-11-23 20:20:42,848 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3204 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2557, Invalid=10553, Unknown=0, NotChecked=0, Total=13110 [2019-11-23 20:20:42,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2019-11-23 20:20:42,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 197. [2019-11-23 20:20:42,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-11-23 20:20:42,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 255 transitions. [2019-11-23 20:20:42,869 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 255 transitions. Word has length 101 [2019-11-23 20:20:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:42,869 INFO L462 AbstractCegarLoop]: Abstraction has 197 states and 255 transitions. [2019-11-23 20:20:42,869 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-23 20:20:42,869 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 255 transitions. [2019-11-23 20:20:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-11-23 20:20:42,871 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:42,872 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 28, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:43,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:43,075 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:43,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:43,076 INFO L82 PathProgramCache]: Analyzing trace with hash -565502961, now seen corresponding path program 6 times [2019-11-23 20:20:43,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:43,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901130525] [2019-11-23 20:20:43,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:43,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:43,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 20 proven. 1198 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2019-11-23 20:20:43,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901130525] [2019-11-23 20:20:43,290 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23157383] [2019-11-23 20:20:43,290 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:43,397 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-11-23 20:20:43,397 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:43,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:20:43,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:43,480 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:20:43,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1464 backedges. 15 proven. 1204 refuted. 0 times theorem prover too weak. 245 trivial. 0 not checked. [2019-11-23 20:20:43,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:43,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 20 [2019-11-23 20:20:43,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840454184] [2019-11-23 20:20:43,503 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-23 20:20:43,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:43,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-23 20:20:43,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:20:43,504 INFO L87 Difference]: Start difference. First operand 197 states and 255 transitions. Second operand 20 states. [2019-11-23 20:20:44,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:44,540 INFO L93 Difference]: Finished difference Result 491 states and 642 transitions. [2019-11-23 20:20:44,540 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-23 20:20:44,540 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 131 [2019-11-23 20:20:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:44,542 INFO L225 Difference]: With dead ends: 491 [2019-11-23 20:20:44,543 INFO L226 Difference]: Without dead ends: 312 [2019-11-23 20:20:44,544 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=807, Invalid=2273, Unknown=0, NotChecked=0, Total=3080 [2019-11-23 20:20:44,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2019-11-23 20:20:44,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 247. [2019-11-23 20:20:44,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2019-11-23 20:20:44,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 321 transitions. [2019-11-23 20:20:44,582 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 321 transitions. Word has length 131 [2019-11-23 20:20:44,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:44,582 INFO L462 AbstractCegarLoop]: Abstraction has 247 states and 321 transitions. [2019-11-23 20:20:44,582 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-23 20:20:44,582 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 321 transitions. [2019-11-23 20:20:44,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2019-11-23 20:20:44,584 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:44,584 INFO L410 BasicCegarLoop]: trace histogram [42, 42, 42, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:44,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:44,788 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:44,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:44,789 INFO L82 PathProgramCache]: Analyzing trace with hash 694683327, now seen corresponding path program 7 times [2019-11-23 20:20:44,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:44,790 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141209897] [2019-11-23 20:20:44,790 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:45,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3159 backedges. 1115 proven. 1768 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2019-11-23 20:20:45,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141209897] [2019-11-23 20:20:45,415 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036185961] [2019-11-23 20:20:45,415 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:45,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:45,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-23 20:20:45,590 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3159 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 3078 trivial. 0 not checked. [2019-11-23 20:20:45,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:45,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 12] total 44 [2019-11-23 20:20:45,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952784432] [2019-11-23 20:20:45,843 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:20:45,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:45,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:20:45,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=1677, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:20:45,844 INFO L87 Difference]: Start difference. First operand 247 states and 321 transitions. Second operand 44 states. [2019-11-23 20:20:53,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:53,699 INFO L93 Difference]: Finished difference Result 794 states and 1052 transitions. [2019-11-23 20:20:53,700 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2019-11-23 20:20:53,700 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 181 [2019-11-23 20:20:53,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:53,702 INFO L225 Difference]: With dead ends: 794 [2019-11-23 20:20:53,702 INFO L226 Difference]: Without dead ends: 568 [2019-11-23 20:20:53,710 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9409 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=4382, Invalid=26068, Unknown=0, NotChecked=0, Total=30450 [2019-11-23 20:20:53,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2019-11-23 20:20:53,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 255. [2019-11-23 20:20:53,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2019-11-23 20:20:53,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 331 transitions. [2019-11-23 20:20:53,736 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 331 transitions. Word has length 181 [2019-11-23 20:20:53,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:53,736 INFO L462 AbstractCegarLoop]: Abstraction has 255 states and 331 transitions. [2019-11-23 20:20:53,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:20:53,737 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 331 transitions. [2019-11-23 20:20:53,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2019-11-23 20:20:53,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:53,739 INFO L410 BasicCegarLoop]: trace histogram [44, 44, 44, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:53,943 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:53,944 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:53,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1959125909, now seen corresponding path program 8 times [2019-11-23 20:20:53,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:53,946 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582881618] [2019-11-23 20:20:53,947 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:53,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 3451 backedges. 972 proven. 202 refuted. 0 times theorem prover too weak. 2277 trivial. 0 not checked. [2019-11-23 20:20:54,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582881618] [2019-11-23 20:20:54,273 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076090611] [2019-11-23 20:20:54,273 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:54,409 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:20:54,409 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:54,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:20:54,414 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 3451 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3351 trivial. 0 not checked. [2019-11-23 20:20:54,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:54,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 27 [2019-11-23 20:20:54,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187831811] [2019-11-23 20:20:54,603 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:20:54,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:54,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:20:54,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=559, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:20:54,604 INFO L87 Difference]: Start difference. First operand 255 states and 331 transitions. Second operand 27 states. [2019-11-23 20:20:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:57,610 INFO L93 Difference]: Finished difference Result 574 states and 759 transitions. [2019-11-23 20:20:57,610 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2019-11-23 20:20:57,611 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 189 [2019-11-23 20:20:57,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:57,614 INFO L225 Difference]: With dead ends: 574 [2019-11-23 20:20:57,614 INFO L226 Difference]: Without dead ends: 342 [2019-11-23 20:20:57,617 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3997 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=3535, Invalid=8237, Unknown=0, NotChecked=0, Total=11772 [2019-11-23 20:20:57,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2019-11-23 20:20:57,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 290. [2019-11-23 20:20:57,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2019-11-23 20:20:57,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 379 transitions. [2019-11-23 20:20:57,641 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 379 transitions. Word has length 189 [2019-11-23 20:20:57,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:57,641 INFO L462 AbstractCegarLoop]: Abstraction has 290 states and 379 transitions. [2019-11-23 20:20:57,641 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:20:57,641 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 379 transitions. [2019-11-23 20:20:57,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-11-23 20:20:57,644 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:57,644 INFO L410 BasicCegarLoop]: trace histogram [54, 54, 54, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:57,848 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:57,848 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:57,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:57,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1393250152, now seen corresponding path program 9 times [2019-11-23 20:20:57,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:57,849 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22532384] [2019-11-23 20:20:57,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:57,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:20:58,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5099 backedges. 1350 proven. 250 refuted. 0 times theorem prover too weak. 3499 trivial. 0 not checked. [2019-11-23 20:20:58,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22532384] [2019-11-23 20:20:58,097 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979279537] [2019-11-23 20:20:58,097 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:58,323 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-11-23 20:20:58,323 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:20:58,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-23 20:20:58,328 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:20:58,382 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:20:58,402 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:20:58,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:20:58,424 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:20:58,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5099 backedges. 1390 proven. 117 refuted. 0 times theorem prover too weak. 3592 trivial. 0 not checked. [2019-11-23 20:20:58,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:20:58,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 23 [2019-11-23 20:20:58,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989593331] [2019-11-23 20:20:58,459 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:20:58,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:20:58,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:20:58,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:20:58,460 INFO L87 Difference]: Start difference. First operand 290 states and 379 transitions. Second operand 23 states. [2019-11-23 20:20:59,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:20:59,497 INFO L93 Difference]: Finished difference Result 939 states and 1303 transitions. [2019-11-23 20:20:59,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-23 20:20:59,497 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 224 [2019-11-23 20:20:59,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:20:59,503 INFO L225 Difference]: With dead ends: 939 [2019-11-23 20:20:59,503 INFO L226 Difference]: Without dead ends: 930 [2019-11-23 20:20:59,504 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=993, Invalid=2199, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 20:20:59,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2019-11-23 20:20:59,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 296. [2019-11-23 20:20:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2019-11-23 20:20:59,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 389 transitions. [2019-11-23 20:20:59,529 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 389 transitions. Word has length 224 [2019-11-23 20:20:59,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:20:59,530 INFO L462 AbstractCegarLoop]: Abstraction has 296 states and 389 transitions. [2019-11-23 20:20:59,530 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:20:59,531 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 389 transitions. [2019-11-23 20:20:59,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2019-11-23 20:20:59,534 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:20:59,534 INFO L410 BasicCegarLoop]: trace histogram [56, 56, 56, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:20:59,738 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:20:59,739 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:20:59,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:20:59,739 INFO L82 PathProgramCache]: Analyzing trace with hash -2057329850, now seen corresponding path program 10 times [2019-11-23 20:20:59,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:20:59,740 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64100309] [2019-11-23 20:20:59,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:20:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 5446 backedges. 146 proven. 4739 refuted. 0 times theorem prover too weak. 561 trivial. 0 not checked. [2019-11-23 20:21:00,188 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64100309] [2019-11-23 20:21:00,189 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267483826] [2019-11-23 20:21:00,189 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:00,343 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:21:00,343 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:00,345 INFO L255 TraceCheckSpWp]: Trace formula consists of 850 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-23 20:21:00,348 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:00,455 INFO L134 CoverageAnalysis]: Checked inductivity of 5446 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5325 trivial. 0 not checked. [2019-11-23 20:21:00,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:00,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 31 [2019-11-23 20:21:00,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438936643] [2019-11-23 20:21:00,457 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-23 20:21:00,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:00,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-23 20:21:00,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2019-11-23 20:21:00,457 INFO L87 Difference]: Start difference. First operand 296 states and 389 transitions. Second operand 31 states. [2019-11-23 20:21:02,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:02,821 INFO L93 Difference]: Finished difference Result 835 states and 1112 transitions. [2019-11-23 20:21:02,821 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2019-11-23 20:21:02,822 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 230 [2019-11-23 20:21:02,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:02,824 INFO L225 Difference]: With dead ends: 835 [2019-11-23 20:21:02,824 INFO L226 Difference]: Without dead ends: 564 [2019-11-23 20:21:02,825 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4266 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3136, Invalid=8854, Unknown=0, NotChecked=0, Total=11990 [2019-11-23 20:21:02,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2019-11-23 20:21:02,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 328. [2019-11-23 20:21:02,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2019-11-23 20:21:02,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 432 transitions. [2019-11-23 20:21:02,856 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 432 transitions. Word has length 230 [2019-11-23 20:21:02,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:02,857 INFO L462 AbstractCegarLoop]: Abstraction has 328 states and 432 transitions. [2019-11-23 20:21:02,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-23 20:21:02,857 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 432 transitions. [2019-11-23 20:21:02,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2019-11-23 20:21:02,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:02,859 INFO L410 BasicCegarLoop]: trace histogram [64, 64, 64, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:03,062 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:03,063 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:03,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:03,063 INFO L82 PathProgramCache]: Analyzing trace with hash 604422535, now seen corresponding path program 11 times [2019-11-23 20:21:03,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:03,064 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78141477] [2019-11-23 20:21:03,064 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:04,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7072 backedges. 3347 proven. 3147 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2019-11-23 20:21:04,026 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78141477] [2019-11-23 20:21:04,027 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321432369] [2019-11-23 20:21:04,028 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:04,305 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2019-11-23 20:21:04,306 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:04,309 INFO L255 TraceCheckSpWp]: Trace formula consists of 802 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-23 20:21:04,314 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:04,412 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:21:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 7072 backedges. 4786 proven. 1227 refuted. 0 times theorem prover too weak. 1059 trivial. 0 not checked. [2019-11-23 20:21:04,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:04,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 22] total 44 [2019-11-23 20:21:04,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678216602] [2019-11-23 20:21:04,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-23 20:21:04,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:04,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-23 20:21:04,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=1672, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:21:04,468 INFO L87 Difference]: Start difference. First operand 328 states and 432 transitions. Second operand 44 states. [2019-11-23 20:21:24,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:24,424 INFO L93 Difference]: Finished difference Result 3346 states and 4691 transitions. [2019-11-23 20:21:24,425 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 396 states. [2019-11-23 20:21:24,425 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 259 [2019-11-23 20:21:24,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:24,440 INFO L225 Difference]: With dead ends: 3346 [2019-11-23 20:21:24,441 INFO L226 Difference]: Without dead ends: 3105 [2019-11-23 20:21:24,454 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 930 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 432 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77491 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=20916, Invalid=167006, Unknown=0, NotChecked=0, Total=187922 [2019-11-23 20:21:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3105 states. [2019-11-23 20:21:24,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3105 to 477. [2019-11-23 20:21:24,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2019-11-23 20:21:24,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 628 transitions. [2019-11-23 20:21:24,532 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 628 transitions. Word has length 259 [2019-11-23 20:21:24,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:24,533 INFO L462 AbstractCegarLoop]: Abstraction has 477 states and 628 transitions. [2019-11-23 20:21:24,533 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-23 20:21:24,533 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 628 transitions. [2019-11-23 20:21:24,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-11-23 20:21:24,535 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:24,535 INFO L410 BasicCegarLoop]: trace histogram [65, 65, 65, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:24,740 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:24,740 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:24,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:24,741 INFO L82 PathProgramCache]: Analyzing trace with hash -435255615, now seen corresponding path program 12 times [2019-11-23 20:21:24,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:24,748 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625370088] [2019-11-23 20:21:24,749 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:24,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:25,140 INFO L134 CoverageAnalysis]: Checked inductivity of 7275 backedges. 1815 proven. 303 refuted. 0 times theorem prover too weak. 5157 trivial. 0 not checked. [2019-11-23 20:21:25,140 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625370088] [2019-11-23 20:21:25,141 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218088221] [2019-11-23 20:21:25,141 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:25,569 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-23 20:21:25,569 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:25,573 INFO L255 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:21:25,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:25,602 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:21:25,621 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:21:25,638 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:21:25,639 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:21:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 7275 backedges. 1836 proven. 145 refuted. 0 times theorem prover too weak. 5294 trivial. 0 not checked. [2019-11-23 20:21:25,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:25,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 22 [2019-11-23 20:21:25,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908031510] [2019-11-23 20:21:25,684 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:21:25,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:25,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:21:25,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:21:25,685 INFO L87 Difference]: Start difference. First operand 477 states and 628 transitions. Second operand 22 states. [2019-11-23 20:21:26,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:26,816 INFO L93 Difference]: Finished difference Result 1474 states and 2046 transitions. [2019-11-23 20:21:26,816 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-23 20:21:26,817 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 262 [2019-11-23 20:21:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:26,824 INFO L225 Difference]: With dead ends: 1474 [2019-11-23 20:21:26,825 INFO L226 Difference]: Without dead ends: 1465 [2019-11-23 20:21:26,826 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 807 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=979, Invalid=2213, Unknown=0, NotChecked=0, Total=3192 [2019-11-23 20:21:26,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1465 states. [2019-11-23 20:21:26,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1465 to 480. [2019-11-23 20:21:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 480 states. [2019-11-23 20:21:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 633 transitions. [2019-11-23 20:21:26,895 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 633 transitions. Word has length 262 [2019-11-23 20:21:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:26,896 INFO L462 AbstractCegarLoop]: Abstraction has 480 states and 633 transitions. [2019-11-23 20:21:26,896 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:21:26,896 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 633 transitions. [2019-11-23 20:21:26,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2019-11-23 20:21:26,898 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:26,898 INFO L410 BasicCegarLoop]: trace histogram [66, 66, 66, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:27,103 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:27,104 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:27,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:27,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1874727303, now seen corresponding path program 13 times [2019-11-23 20:21:27,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:27,105 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878273071] [2019-11-23 20:21:27,106 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:27,434 INFO L134 CoverageAnalysis]: Checked inductivity of 7481 backedges. 32 proven. 6601 refuted. 0 times theorem prover too weak. 848 trivial. 0 not checked. [2019-11-23 20:21:27,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878273071] [2019-11-23 20:21:27,435 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636687681] [2019-11-23 20:21:27,435 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:27,606 INFO L255 TraceCheckSpWp]: Trace formula consists of 983 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:21:27,610 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 7481 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 7337 trivial. 0 not checked. [2019-11-23 20:21:27,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:27,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 22 [2019-11-23 20:21:27,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274904602] [2019-11-23 20:21:27,698 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:21:27,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:27,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:21:27,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=336, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:21:27,699 INFO L87 Difference]: Start difference. First operand 480 states and 633 transitions. Second operand 22 states. [2019-11-23 20:21:29,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:29,392 INFO L93 Difference]: Finished difference Result 1393 states and 1852 transitions. [2019-11-23 20:21:29,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2019-11-23 20:21:29,392 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 265 [2019-11-23 20:21:29,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:29,396 INFO L225 Difference]: With dead ends: 1393 [2019-11-23 20:21:29,397 INFO L226 Difference]: Without dead ends: 940 [2019-11-23 20:21:29,398 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1409 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1337, Invalid=3633, Unknown=0, NotChecked=0, Total=4970 [2019-11-23 20:21:29,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2019-11-23 20:21:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 545. [2019-11-23 20:21:29,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 545 states. [2019-11-23 20:21:29,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 720 transitions. [2019-11-23 20:21:29,466 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 720 transitions. Word has length 265 [2019-11-23 20:21:29,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:29,467 INFO L462 AbstractCegarLoop]: Abstraction has 545 states and 720 transitions. [2019-11-23 20:21:29,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:21:29,467 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 720 transitions. [2019-11-23 20:21:29,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2019-11-23 20:21:29,469 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:29,469 INFO L410 BasicCegarLoop]: trace histogram [75, 75, 75, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:29,673 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:29,674 INFO L410 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:29,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:29,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1400352404, now seen corresponding path program 14 times [2019-11-23 20:21:29,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:29,675 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932129136] [2019-11-23 20:21:29,675 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:29,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 2962 proven. 6069 refuted. 0 times theorem prover too weak. 573 trivial. 0 not checked. [2019-11-23 20:21:30,791 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932129136] [2019-11-23 20:21:30,792 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825680339] [2019-11-23 20:21:30,792 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:30,977 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:21:30,978 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:30,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-23 20:21:30,984 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 9435 trivial. 0 not checked. [2019-11-23 20:21:31,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:31,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 16] total 70 [2019-11-23 20:21:31,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984791070] [2019-11-23 20:21:31,410 INFO L442 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-11-23 20:21:31,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:31,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-11-23 20:21:31,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=4381, Unknown=0, NotChecked=0, Total=4830 [2019-11-23 20:21:31,411 INFO L87 Difference]: Start difference. First operand 545 states and 720 transitions. Second operand 70 states. [2019-11-23 20:21:49,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:49,756 INFO L93 Difference]: Finished difference Result 2174 states and 2933 transitions. [2019-11-23 20:21:49,757 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 254 states. [2019-11-23 20:21:49,757 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 297 [2019-11-23 20:21:49,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:49,763 INFO L225 Difference]: With dead ends: 2174 [2019-11-23 20:21:49,763 INFO L226 Difference]: Without dead ends: 1272 [2019-11-23 20:21:49,767 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 314 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32824 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=11707, Invalid=87833, Unknown=0, NotChecked=0, Total=99540 [2019-11-23 20:21:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1272 states. [2019-11-23 20:21:49,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1272 to 559. [2019-11-23 20:21:49,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 559 states. [2019-11-23 20:21:49,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 733 transitions. [2019-11-23 20:21:49,843 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 733 transitions. Word has length 297 [2019-11-23 20:21:49,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:49,843 INFO L462 AbstractCegarLoop]: Abstraction has 559 states and 733 transitions. [2019-11-23 20:21:49,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-11-23 20:21:49,843 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 733 transitions. [2019-11-23 20:21:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 345 [2019-11-23 20:21:49,845 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:49,846 INFO L410 BasicCegarLoop]: trace histogram [89, 89, 89, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:50,054 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:50,054 INFO L410 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:50,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:50,055 INFO L82 PathProgramCache]: Analyzing trace with hash 530498917, now seen corresponding path program 15 times [2019-11-23 20:21:50,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:50,055 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988755049] [2019-11-23 20:21:50,055 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:50,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13348 backedges. 2798 proven. 388 refuted. 0 times theorem prover too weak. 10162 trivial. 0 not checked. [2019-11-23 20:21:50,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988755049] [2019-11-23 20:21:50,559 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545491379] [2019-11-23 20:21:50,560 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:50,888 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2019-11-23 20:21:50,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:50,891 INFO L255 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-23 20:21:50,897 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:50,945 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:21:50,961 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:21:50,975 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:21:50,976 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:21:51,034 INFO L134 CoverageAnalysis]: Checked inductivity of 13348 backedges. 2848 proven. 176 refuted. 0 times theorem prover too weak. 10324 trivial. 0 not checked. [2019-11-23 20:21:51,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:51,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 25 [2019-11-23 20:21:51,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771137485] [2019-11-23 20:21:51,035 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-23 20:21:51,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:51,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-23 20:21:51,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2019-11-23 20:21:51,036 INFO L87 Difference]: Start difference. First operand 559 states and 733 transitions. Second operand 25 states. [2019-11-23 20:21:52,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:21:52,439 INFO L93 Difference]: Finished difference Result 1775 states and 2457 transitions. [2019-11-23 20:21:52,440 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-23 20:21:52,440 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 344 [2019-11-23 20:21:52,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:21:52,448 INFO L225 Difference]: With dead ends: 1775 [2019-11-23 20:21:52,448 INFO L226 Difference]: Without dead ends: 1766 [2019-11-23 20:21:52,448 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 367 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1297, Invalid=2863, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 20:21:52,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1766 states. [2019-11-23 20:21:52,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1766 to 598. [2019-11-23 20:21:52,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 598 states. [2019-11-23 20:21:52,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 786 transitions. [2019-11-23 20:21:52,537 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 786 transitions. Word has length 344 [2019-11-23 20:21:52,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:21:52,537 INFO L462 AbstractCegarLoop]: Abstraction has 598 states and 786 transitions. [2019-11-23 20:21:52,538 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-23 20:21:52,538 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 786 transitions. [2019-11-23 20:21:52,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2019-11-23 20:21:52,540 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:21:52,540 INFO L410 BasicCegarLoop]: trace histogram [90, 90, 90, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:21:52,745 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:52,746 INFO L410 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:21:52,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:21:52,746 INFO L82 PathProgramCache]: Analyzing trace with hash 682074211, now seen corresponding path program 16 times [2019-11-23 20:21:52,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:21:52,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993101202] [2019-11-23 20:21:52,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:21:52,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:21:53,106 INFO L134 CoverageAnalysis]: Checked inductivity of 13628 backedges. 3042 proven. 424 refuted. 0 times theorem prover too weak. 10162 trivial. 0 not checked. [2019-11-23 20:21:53,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993101202] [2019-11-23 20:21:53,107 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21556757] [2019-11-23 20:21:53,107 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:21:53,340 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:21:53,340 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:21:53,344 INFO L255 TraceCheckSpWp]: Trace formula consists of 1297 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-23 20:21:53,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:21:53,663 INFO L134 CoverageAnalysis]: Checked inductivity of 13628 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 13432 trivial. 0 not checked. [2019-11-23 20:21:53,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:21:53,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2019-11-23 20:21:53,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014603774] [2019-11-23 20:21:53,664 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-23 20:21:53,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:21:53,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-23 20:21:53,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=943, Unknown=0, NotChecked=0, Total=1190 [2019-11-23 20:21:53,664 INFO L87 Difference]: Start difference. First operand 598 states and 786 transitions. Second operand 35 states. [2019-11-23 20:22:00,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:22:00,056 INFO L93 Difference]: Finished difference Result 1301 states and 1728 transitions. [2019-11-23 20:22:00,060 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2019-11-23 20:22:00,060 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 347 [2019-11-23 20:22:00,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:22:00,063 INFO L225 Difference]: With dead ends: 1301 [2019-11-23 20:22:00,064 INFO L226 Difference]: Without dead ends: 734 [2019-11-23 20:22:00,066 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 629 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12675 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=9723, Invalid=22139, Unknown=0, NotChecked=0, Total=31862 [2019-11-23 20:22:00,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 734 states. [2019-11-23 20:22:00,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 734 to 645. [2019-11-23 20:22:00,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2019-11-23 20:22:00,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 851 transitions. [2019-11-23 20:22:00,138 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 851 transitions. Word has length 347 [2019-11-23 20:22:00,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:22:00,139 INFO L462 AbstractCegarLoop]: Abstraction has 645 states and 851 transitions. [2019-11-23 20:22:00,139 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-23 20:22:00,139 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 851 transitions. [2019-11-23 20:22:00,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2019-11-23 20:22:00,142 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:22:00,142 INFO L410 BasicCegarLoop]: trace histogram [104, 104, 104, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:22:00,346 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:22:00,347 INFO L410 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:22:00,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:22:00,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1167386080, now seen corresponding path program 17 times [2019-11-23 20:22:00,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:22:00,348 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747581014] [2019-11-23 20:22:00,348 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:22:00,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:22:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18036 backedges. 3822 proven. 492 refuted. 0 times theorem prover too weak. 13722 trivial. 0 not checked. [2019-11-23 20:22:00,980 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747581014] [2019-11-23 20:22:00,981 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493314277] [2019-11-23 20:22:00,981 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true