/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-crafted/zero_sum2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:13:44,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:13:44,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:13:44,866 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:13:44,867 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:13:44,869 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:13:44,871 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:13:44,881 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:13:44,885 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:13:44,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:13:44,890 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:13:44,892 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:13:44,892 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:13:44,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:13:44,896 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:13:44,898 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:13:44,899 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:13:44,901 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:13:44,903 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:13:44,908 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:13:44,912 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:13:44,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:13:44,917 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:13:44,918 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:13:44,920 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-23 20:13:44,924 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:13:44,925 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:13:44,926 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:13:44,927 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:13:44,928 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:13:44,928 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:13:44,929 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:13:44,929 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:13:44,929 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:13:44,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:13:44,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:13:44,932 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 20:13:44,966 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:13:44,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:13:44,971 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:13:44,972 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:13:44,972 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:13:44,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:13:44,972 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:13:44,972 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:13:44,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:13:44,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:13:44,973 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:13:44,973 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:13:44,973 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:13:44,974 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:13:44,974 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:13:44,974 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:13:44,974 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:13:44,974 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:13:44,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:13:44,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:13:44,980 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:13:44,980 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:13:44,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:13:44,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:13:44,981 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:13:44,981 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:13:44,981 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:13:44,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:13:44,982 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:13:44,982 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:13:45,324 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:13:45,348 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:13:45,353 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:13:45,355 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:13:45,355 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:13:45,356 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum2.c [2019-11-23 20:13:45,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a27512fd5/96c116d6d8d7410cb81ddea29d0b3ec0/FLAG73ba86265 [2019-11-23 20:13:45,850 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:13:45,851 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum2.c [2019-11-23 20:13:45,858 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a27512fd5/96c116d6d8d7410cb81ddea29d0b3ec0/FLAG73ba86265 [2019-11-23 20:13:46,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a27512fd5/96c116d6d8d7410cb81ddea29d0b3ec0 [2019-11-23 20:13:46,275 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:13:46,277 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:13:46,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:13:46,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:13:46,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:13:46,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:13:46" (1/1) ... [2019-11-23 20:13:46,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c891e33 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:46, skipping insertion in model container [2019-11-23 20:13:46,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:13:46" (1/1) ... [2019-11-23 20:13:46,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:13:46,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:13:46,555 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:13:46,560 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:13:46,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:13:46,621 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:13:46,622 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:46 WrapperNode [2019-11-23 20:13:46,622 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:13:46,623 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:13:46,623 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:13:46,623 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:13:46,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:46" (1/1) ... [2019-11-23 20:13:46,756 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:46" (1/1) ... [2019-11-23 20:13:46,780 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:13:46,781 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:13:46,781 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:13:46,781 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:13:46,791 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:46" (1/1) ... [2019-11-23 20:13:46,791 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:46" (1/1) ... [2019-11-23 20:13:46,793 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:46" (1/1) ... [2019-11-23 20:13:46,794 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:46" (1/1) ... [2019-11-23 20:13:46,799 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:46" (1/1) ... [2019-11-23 20:13:46,805 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:46" (1/1) ... [2019-11-23 20:13:46,806 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:46" (1/1) ... [2019-11-23 20:13:46,809 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:13:46,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:13:46,810 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:13:46,810 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:13:46,811 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:46" (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 20:13:46,876 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:13:46,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:13:46,877 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:13:46,877 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:13:46,877 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:13:46,877 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:13:47,185 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:13:47,186 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 20:13:47,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:13:47 BoogieIcfgContainer [2019-11-23 20:13:47,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:13:47,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:13:47,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:13:47,192 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:13:47,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:13:46" (1/3) ... [2019-11-23 20:13:47,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10509e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:13:47, skipping insertion in model container [2019-11-23 20:13:47,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:13:46" (2/3) ... [2019-11-23 20:13:47,194 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10509e1f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:13:47, skipping insertion in model container [2019-11-23 20:13:47,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:13:47" (3/3) ... [2019-11-23 20:13:47,196 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum2.c [2019-11-23 20:13:47,206 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:13:47,213 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:13:47,223 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:13:47,244 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:13:47,244 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:13:47,244 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:13:47,245 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:13:47,245 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:13:47,245 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:13:47,245 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:13:47,245 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:13:47,259 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2019-11-23 20:13:47,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:13:47,265 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:47,266 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:47,266 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:47,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:47,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2019-11-23 20:13:47,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:47,280 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126146230] [2019-11-23 20:13:47,280 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:47,403 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 20:13:47,404 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126146230] [2019-11-23 20:13:47,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:13:47,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:13:47,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476153184] [2019-11-23 20:13:47,411 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:13:47,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:47,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:13:47,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:13:47,426 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2019-11-23 20:13:47,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:47,443 INFO L93 Difference]: Finished difference Result 47 states and 66 transitions. [2019-11-23 20:13:47,443 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:13:47,444 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-11-23 20:13:47,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:47,452 INFO L225 Difference]: With dead ends: 47 [2019-11-23 20:13:47,452 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:13:47,454 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:13:47,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:13:47,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-23 20:13:47,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:13:47,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-23 20:13:47,485 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2019-11-23 20:13:47,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:47,486 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-23 20:13:47,486 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:13:47,486 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-23 20:13:47,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:13:47,487 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:47,487 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:47,488 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:47,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:47,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2019-11-23 20:13:47,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:47,489 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205623326] [2019-11-23 20:13:47,489 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:47,580 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 20:13:47,580 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205623326] [2019-11-23 20:13:47,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:13:47,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:13:47,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328453838] [2019-11-23 20:13:47,583 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:13:47,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:47,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:13:47,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:13:47,584 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 4 states. [2019-11-23 20:13:47,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:47,650 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2019-11-23 20:13:47,651 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:13:47,651 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 20:13:47,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:47,652 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:13:47,652 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:13:47,653 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 20:13:47,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:13:47,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-23 20:13:47,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:13:47,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-23 20:13:47,660 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2019-11-23 20:13:47,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:47,661 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-23 20:13:47,661 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:13:47,661 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-23 20:13:47,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:13:47,662 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:47,662 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:47,663 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:47,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:47,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1458205426, now seen corresponding path program 1 times [2019-11-23 20:13:47,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:47,664 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513482000] [2019-11-23 20:13:47,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:47,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:47,742 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 20:13:47,743 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513482000] [2019-11-23 20:13:47,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:13:47,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:13:47,749 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928303521] [2019-11-23 20:13:47,749 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:13:47,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:47,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:13:47,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:13:47,751 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 3 states. [2019-11-23 20:13:47,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:47,799 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-11-23 20:13:47,799 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:13:47,800 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:13:47,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:47,800 INFO L225 Difference]: With dead ends: 53 [2019-11-23 20:13:47,801 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:13:47,801 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 20:13:47,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:13:47,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-23 20:13:47,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:13:47,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2019-11-23 20:13:47,808 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2019-11-23 20:13:47,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:47,809 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2019-11-23 20:13:47,809 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:13:47,809 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2019-11-23 20:13:47,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:13:47,810 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:47,810 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:47,810 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:47,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:47,811 INFO L82 PathProgramCache]: Analyzing trace with hash 477186736, now seen corresponding path program 1 times [2019-11-23 20:13:47,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:47,812 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570312093] [2019-11-23 20:13:47,812 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-11-23 20:13:47,878 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570312093] [2019-11-23 20:13:47,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:13:47,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:13:47,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942044369] [2019-11-23 20:13:47,879 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:13:47,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:47,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:13:47,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:13:47,880 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 4 states. [2019-11-23 20:13:47,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:47,966 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2019-11-23 20:13:47,966 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:13:47,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-23 20:13:47,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:47,967 INFO L225 Difference]: With dead ends: 48 [2019-11-23 20:13:47,967 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:13:47,968 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:13:47,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:13:47,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2019-11-23 20:13:47,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:13:47,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-23 20:13:47,974 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2019-11-23 20:13:47,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:47,974 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-23 20:13:47,974 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:13:47,975 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-23 20:13:47,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:13:47,975 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:47,976 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:47,976 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:47,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:47,976 INFO L82 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2019-11-23 20:13:47,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:47,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811773419] [2019-11-23 20:13:47,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:47,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:48,039 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:13:48,039 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811773419] [2019-11-23 20:13:48,040 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313426732] [2019-11-23 20:13:48,040 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 20:13:48,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:48,106 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:13:48,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-11-23 20:13:48,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:48,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:13:48,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466656792] [2019-11-23 20:13:48,164 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:13:48,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:48,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:13:48,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:13:48,165 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2019-11-23 20:13:48,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:48,213 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2019-11-23 20:13:48,214 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:13:48,214 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-23 20:13:48,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:48,215 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:13:48,215 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:13:48,216 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:13:48,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:13:48,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:13:48,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:13:48,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:13:48,222 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 20:13:48,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:48,222 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:13:48,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:13:48,223 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:13:48,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:13:48,224 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:48,224 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:48,427 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:48,428 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:48,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:48,440 INFO L82 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2019-11-23 20:13:48,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:48,440 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351159838] [2019-11-23 20:13:48,441 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:13:48,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351159838] [2019-11-23 20:13:48,515 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923939763] [2019-11-23 20:13:48,516 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 20:13:48,563 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:13:48,563 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:48,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:13:48,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-23 20:13:48,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:48,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-23 20:13:48,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722099419] [2019-11-23 20:13:48,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:13:48,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:48,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:13:48,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:13:48,603 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2019-11-23 20:13:48,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:48,737 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2019-11-23 20:13:48,737 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:13:48,737 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-11-23 20:13:48,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:48,738 INFO L225 Difference]: With dead ends: 56 [2019-11-23 20:13:48,738 INFO L226 Difference]: Without dead ends: 40 [2019-11-23 20:13:48,739 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2019-11-23 20:13:48,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-11-23 20:13:48,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2019-11-23 20:13:48,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:13:48,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-11-23 20:13:48,745 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2019-11-23 20:13:48,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:48,745 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-11-23 20:13:48,746 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:13:48,746 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-11-23 20:13:48,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:13:48,747 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:48,747 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:48,950 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:48,950 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:48,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:48,951 INFO L82 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2019-11-23 20:13:48,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:48,952 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789891677] [2019-11-23 20:13:48,952 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:49,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:49,730 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:13:49,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789891677] [2019-11-23 20:13:49,731 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469578364] [2019-11-23 20:13:49,731 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 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 20:13:49,790 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:13:49,790 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:49,792 WARN L253 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 50 conjunts are in the unsatisfiable core [2019-11-23 20:13:49,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:50,575 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:13:50,576 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 16 [2019-11-23 20:13:50,579 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-23 20:13:50,596 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:13:50,597 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:13:50,597 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:23 [2019-11-23 20:13:50,637 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:13:50,703 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:13:50,719 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:13:50,765 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:13:50,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:50,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 33 [2019-11-23 20:13:50,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235863779] [2019-11-23 20:13:50,768 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-23 20:13:50,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:50,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-23 20:13:50,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2019-11-23 20:13:50,770 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 33 states. [2019-11-23 20:13:51,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:51,914 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-11-23 20:13:51,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-23 20:13:51,915 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 35 [2019-11-23 20:13:51,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:51,917 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:13:51,918 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:13:51,919 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 8 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2019-11-23 20:13:51,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:13:51,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 53. [2019-11-23 20:13:51,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:13:51,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2019-11-23 20:13:51,929 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2019-11-23 20:13:51,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:51,929 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2019-11-23 20:13:51,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-23 20:13:51,930 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2019-11-23 20:13:51,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:13:51,931 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:51,931 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:52,134 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:52,134 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:52,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:52,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2019-11-23 20:13:52,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:52,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907669408] [2019-11-23 20:13:52,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:52,239 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:13:52,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907669408] [2019-11-23 20:13:52,239 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267110065] [2019-11-23 20:13:52,239 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 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 20:13:52,299 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:13:52,299 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:52,300 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:13:52,303 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:52,402 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-23 20:13:52,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:52,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2019-11-23 20:13:52,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433229151] [2019-11-23 20:13:52,403 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:13:52,403 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:52,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:13:52,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:13:52,404 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 15 states. [2019-11-23 20:13:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:52,773 INFO L93 Difference]: Finished difference Result 138 states and 155 transitions. [2019-11-23 20:13:52,774 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:13:52,774 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2019-11-23 20:13:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:52,775 INFO L225 Difference]: With dead ends: 138 [2019-11-23 20:13:52,775 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:13:52,776 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=352, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:13:52,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:13:52,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2019-11-23 20:13:52,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:13:52,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2019-11-23 20:13:52,785 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 37 [2019-11-23 20:13:52,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:52,785 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2019-11-23 20:13:52,785 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:13:52,785 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2019-11-23 20:13:52,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:13:52,786 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:52,786 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:52,990 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:52,990 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:52,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:52,991 INFO L82 PathProgramCache]: Analyzing trace with hash -192826428, now seen corresponding path program 5 times [2019-11-23 20:13:52,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:52,992 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454759007] [2019-11-23 20:13:52,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:53,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:13:53,068 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454759007] [2019-11-23 20:13:53,069 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680559389] [2019-11-23 20:13:53,069 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 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 20:13:53,148 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:13:53,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:53,150 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:13:53,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2019-11-23 20:13:53,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:53,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2019-11-23 20:13:53,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722510082] [2019-11-23 20:13:53,228 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-23 20:13:53,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:53,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-23 20:13:53,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2019-11-23 20:13:53,229 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 15 states. [2019-11-23 20:13:53,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:13:53,496 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2019-11-23 20:13:53,496 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:13:53,497 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2019-11-23 20:13:53,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:13:53,497 INFO L225 Difference]: With dead ends: 66 [2019-11-23 20:13:53,498 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:13:53,500 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2019-11-23 20:13:53,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:13:53,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2019-11-23 20:13:53,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:13:53,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-11-23 20:13:53,507 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2019-11-23 20:13:53,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:13:53,508 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-11-23 20:13:53,508 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-23 20:13:53,508 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-11-23 20:13:53,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:13:53,509 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:13:53,509 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:13:53,717 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:13:53,718 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:13:53,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:13:53,718 INFO L82 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2019-11-23 20:13:53,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:13:53,719 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616958963] [2019-11-23 20:13:53,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:13:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:13:54,983 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 30 [2019-11-23 20:13:57,013 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:13:57,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616958963] [2019-11-23 20:13:57,013 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189493041] [2019-11-23 20:13:57,014 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 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 20:13:57,061 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:13:57,061 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:13:57,063 WARN L253 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 64 conjunts are in the unsatisfiable core [2019-11-23 20:13:57,066 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:13:57,750 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:13:57,793 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-23 20:13:57,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:13:57,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 18] total 49 [2019-11-23 20:13:57,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341532298] [2019-11-23 20:13:57,794 INFO L442 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-11-23 20:13:57,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:13:57,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-11-23 20:13:57,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2125, Unknown=0, NotChecked=0, Total=2352 [2019-11-23 20:13:57,796 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 49 states. [2019-11-23 20:13:59,226 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2019-11-23 20:14:01,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:01,767 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2019-11-23 20:14:01,768 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2019-11-23 20:14:01,768 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 45 [2019-11-23 20:14:01,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:01,770 INFO L225 Difference]: With dead ends: 101 [2019-11-23 20:14:01,770 INFO L226 Difference]: Without dead ends: 97 [2019-11-23 20:14:01,774 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 29 SyntacticMatches, 9 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=706, Invalid=6434, Unknown=0, NotChecked=0, Total=7140 [2019-11-23 20:14:01,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-23 20:14:01,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 77. [2019-11-23 20:14:01,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-23 20:14:01,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 86 transitions. [2019-11-23 20:14:01,786 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 86 transitions. Word has length 45 [2019-11-23 20:14:01,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:01,786 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 86 transitions. [2019-11-23 20:14:01,786 INFO L463 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-11-23 20:14:01,786 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 86 transitions. [2019-11-23 20:14:01,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:14:01,787 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:01,787 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:01,994 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:01,995 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:01,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:01,995 INFO L82 PathProgramCache]: Analyzing trace with hash -703050612, now seen corresponding path program 7 times [2019-11-23 20:14:01,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:01,996 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981240859] [2019-11-23 20:14:01,996 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:02,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:02,110 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 20:14:02,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981240859] [2019-11-23 20:14:02,110 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821228904] [2019-11-23 20:14:02,111 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 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 20:14:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:02,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:14:02,153 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:02,255 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-11-23 20:14:02,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:02,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2019-11-23 20:14:02,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060143800] [2019-11-23 20:14:02,256 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:14:02,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:02,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:14:02,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:14:02,257 INFO L87 Difference]: Start difference. First operand 77 states and 86 transitions. Second operand 19 states. [2019-11-23 20:14:02,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:02,653 INFO L93 Difference]: Finished difference Result 185 states and 204 transitions. [2019-11-23 20:14:02,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-23 20:14:02,653 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 47 [2019-11-23 20:14:02,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:02,654 INFO L225 Difference]: With dead ends: 185 [2019-11-23 20:14:02,654 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:14:02,655 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:14:02,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:14:02,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2019-11-23 20:14:02,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:14:02,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2019-11-23 20:14:02,664 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 47 [2019-11-23 20:14:02,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:02,664 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2019-11-23 20:14:02,664 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:14:02,664 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2019-11-23 20:14:02,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:14:02,665 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:02,666 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:02,868 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:02,869 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:02,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:02,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1992374766, now seen corresponding path program 8 times [2019-11-23 20:14:02,869 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:02,870 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998512880] [2019-11-23 20:14:02,870 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:02,965 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-23 20:14:02,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998512880] [2019-11-23 20:14:02,965 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695174799] [2019-11-23 20:14:02,966 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 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 20:14:03,006 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:14:03,006 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:03,007 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:14:03,009 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2019-11-23 20:14:03,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:03,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2019-11-23 20:14:03,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088832291] [2019-11-23 20:14:03,111 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:14:03,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:03,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:14:03,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:14:03,112 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 19 states. [2019-11-23 20:14:03,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:03,458 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2019-11-23 20:14:03,458 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:14:03,458 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2019-11-23 20:14:03,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:03,460 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:14:03,460 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:14:03,461 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=167, Invalid=483, Unknown=0, NotChecked=0, Total=650 [2019-11-23 20:14:03,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:14:03,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2019-11-23 20:14:03,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:14:03,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2019-11-23 20:14:03,467 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2019-11-23 20:14:03,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:03,467 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2019-11-23 20:14:03,467 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:14:03,468 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2019-11-23 20:14:03,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:14:03,469 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:03,469 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:03,671 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:03,672 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:03,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2019-11-23 20:14:03,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:03,674 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242386680] [2019-11-23 20:14:03,674 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:04,527 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 25 [2019-11-23 20:14:04,656 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2019-11-23 20:14:04,786 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 27 [2019-11-23 20:14:04,929 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2019-11-23 20:14:05,082 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2019-11-23 20:14:05,239 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2019-11-23 20:14:05,399 WARN L192 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 34 [2019-11-23 20:14:05,559 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 31 [2019-11-23 20:14:05,712 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 35 [2019-11-23 20:14:05,861 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 32 [2019-11-23 20:14:06,031 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 31 [2019-11-23 20:14:08,680 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 1 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:14:08,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242386680] [2019-11-23 20:14:08,680 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648385520] [2019-11-23 20:14:08,680 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 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 20:14:08,729 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:14:08,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:08,731 WARN L253 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 83 conjunts are in the unsatisfiable core [2019-11-23 20:14:08,734 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:10,450 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:14:10,451 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:14:10,453 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:14:10,464 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:14:10,465 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 51 [2019-11-23 20:14:10,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:14:10,466 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:14:10,467 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:14:10,469 INFO L496 ElimStorePlain]: Start of recursive call 2: 2 dim-0 vars, End of recursive call: 2 dim-0 vars, and 4 xjuncts. [2019-11-23 20:14:10,504 INFO L567 ElimStorePlain]: treesize reduction 51, result has 35.4 percent of original size [2019-11-23 20:14:10,504 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:14:10,506 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:14:10,507 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:48, output treesize:20 [2019-11-23 20:14:10,595 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:14:10,678 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:14:10,710 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:14:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 7 proven. 64 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:14:10,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:10,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 26] total 67 [2019-11-23 20:14:10,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124663014] [2019-11-23 20:14:10,779 INFO L442 AbstractCegarLoop]: Interpolant automaton has 67 states [2019-11-23 20:14:10,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:10,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2019-11-23 20:14:10,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=4002, Unknown=0, NotChecked=0, Total=4422 [2019-11-23 20:14:10,781 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 67 states. [2019-11-23 20:14:13,033 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2019-11-23 20:14:13,914 WARN L192 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2019-11-23 20:14:15,726 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 65 [2019-11-23 20:14:18,201 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2019-11-23 20:14:19,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:19,670 INFO L93 Difference]: Finished difference Result 152 states and 166 transitions. [2019-11-23 20:14:19,670 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2019-11-23 20:14:19,671 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 55 [2019-11-23 20:14:19,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:19,672 INFO L225 Difference]: With dead ends: 152 [2019-11-23 20:14:19,672 INFO L226 Difference]: Without dead ends: 146 [2019-11-23 20:14:19,676 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 28 SyntacticMatches, 12 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4541 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1395, Invalid=14607, Unknown=0, NotChecked=0, Total=16002 [2019-11-23 20:14:19,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-23 20:14:19,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 93. [2019-11-23 20:14:19,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-11-23 20:14:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 102 transitions. [2019-11-23 20:14:19,686 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 102 transitions. Word has length 55 [2019-11-23 20:14:19,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:19,687 INFO L462 AbstractCegarLoop]: Abstraction has 93 states and 102 transitions. [2019-11-23 20:14:19,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 67 states. [2019-11-23 20:14:19,687 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 102 transitions. [2019-11-23 20:14:19,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:14:19,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:19,688 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:19,891 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:19,892 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:19,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:19,892 INFO L82 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2019-11-23 20:14:19,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:19,893 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384693820] [2019-11-23 20:14:19,893 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:19,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:20,005 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:14:20,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384693820] [2019-11-23 20:14:20,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152604229] [2019-11-23 20:14:20,006 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 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 20:14:20,051 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:14:20,051 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:20,052 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:14:20,055 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:20,223 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2019-11-23 20:14:20,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:20,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2019-11-23 20:14:20,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569966214] [2019-11-23 20:14:20,226 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-23 20:14:20,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:20,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-23 20:14:20,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2019-11-23 20:14:20,227 INFO L87 Difference]: Start difference. First operand 93 states and 102 transitions. Second operand 23 states. [2019-11-23 20:14:20,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:20,905 INFO L93 Difference]: Finished difference Result 221 states and 240 transitions. [2019-11-23 20:14:20,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-23 20:14:20,906 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 57 [2019-11-23 20:14:20,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:20,907 INFO L225 Difference]: With dead ends: 221 [2019-11-23 20:14:20,907 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 20:14:20,911 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=891, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:14:20,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 20:14:20,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2019-11-23 20:14:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:14:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2019-11-23 20:14:20,927 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 57 [2019-11-23 20:14:20,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:20,928 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2019-11-23 20:14:20,929 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-23 20:14:20,929 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2019-11-23 20:14:20,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:14:20,937 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:20,937 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:21,141 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:21,141 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:21,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:21,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1701588072, now seen corresponding path program 11 times [2019-11-23 20:14:21,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:21,147 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150913581] [2019-11-23 20:14:21,147 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:21,257 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:14:21,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150913581] [2019-11-23 20:14:21,257 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108374042] [2019-11-23 20:14:21,257 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 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 20:14:21,392 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:14:21,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:21,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:14:21,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:21,507 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-11-23 20:14:21,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:21,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-23 20:14:21,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948715868] [2019-11-23 20:14:21,509 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:14:21,509 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:21,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:14:21,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:14:21,510 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 19 states. [2019-11-23 20:14:22,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:22,025 INFO L93 Difference]: Finished difference Result 93 states and 99 transitions. [2019-11-23 20:14:22,025 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-23 20:14:22,025 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2019-11-23 20:14:22,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:22,026 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:14:22,026 INFO L226 Difference]: Without dead ends: 69 [2019-11-23 20:14:22,030 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=614, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:14:22,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-23 20:14:22,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 66. [2019-11-23 20:14:22,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:14:22,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:14:22,037 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2019-11-23 20:14:22,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:22,037 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:14:22,037 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:14:22,038 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:14:22,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:14:22,038 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:22,039 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:22,243 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:22,243 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:22,244 INFO L82 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2019-11-23 20:14:22,244 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:22,244 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784568769] [2019-11-23 20:14:22,244 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:23,251 WARN L192 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 21 [2019-11-23 20:14:23,446 WARN L192 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2019-11-23 20:14:23,652 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 32 [2019-11-23 20:14:23,857 WARN L192 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 37 [2019-11-23 20:14:24,083 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 35 [2019-11-23 20:14:24,314 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 39 [2019-11-23 20:14:24,517 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 35 [2019-11-23 20:14:24,708 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 39 [2019-11-23 20:14:24,899 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2019-11-23 20:14:25,084 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 37 [2019-11-23 20:14:25,241 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 31 [2019-11-23 20:14:25,419 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 36 [2019-11-23 20:14:25,584 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 33 [2019-11-23 20:14:25,803 WARN L192 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 38 [2019-11-23 20:14:26,012 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2019-11-23 20:14:26,212 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 36 [2019-11-23 20:14:26,403 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 34 [2019-11-23 20:14:26,590 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2019-11-23 20:14:26,776 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2019-11-23 20:14:26,952 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2019-11-23 20:14:27,540 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 35 [2019-11-23 20:14:27,702 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2019-11-23 20:14:27,894 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 37 [2019-11-23 20:14:28,058 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2019-11-23 20:14:28,232 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 42 [2019-11-23 20:14:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 4 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:14:30,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784568769] [2019-11-23 20:14:30,602 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113914893] [2019-11-23 20:14:30,602 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 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 20:14:30,657 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-23 20:14:30,658 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:30,660 WARN L253 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 98 conjunts are in the unsatisfiable core [2019-11-23 20:14:30,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:30,747 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:14:30,748 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:14:30,756 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:14:30,756 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:14:30,757 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2019-11-23 20:14:33,074 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:14:33,075 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 18 [2019-11-23 20:14:33,076 INFO L496 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2019-11-23 20:14:33,086 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:14:33,087 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:14:33,089 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:14:33,089 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:29, output treesize:18 [2019-11-23 20:14:33,187 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:14:33,285 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:14:33,326 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:14:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 9 proven. 100 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-11-23 20:14:33,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:33,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 30] total 83 [2019-11-23 20:14:33,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048478683] [2019-11-23 20:14:33,420 INFO L442 AbstractCegarLoop]: Interpolant automaton has 83 states [2019-11-23 20:14:33,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:33,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2019-11-23 20:14:33,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=6352, Unknown=0, NotChecked=0, Total=6806 [2019-11-23 20:14:33,422 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 83 states. [2019-11-23 20:14:36,419 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 55 [2019-11-23 20:14:36,819 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2019-11-23 20:14:37,143 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 46 [2019-11-23 20:14:38,129 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 65 [2019-11-23 20:14:39,024 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2019-11-23 20:14:41,034 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 76 [2019-11-23 20:14:41,759 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 42 [2019-11-23 20:14:45,124 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 54 [2019-11-23 20:14:45,532 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 83 [2019-11-23 20:14:45,893 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 52 [2019-11-23 20:14:46,505 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 56 [2019-11-23 20:14:46,904 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 66 [2019-11-23 20:14:49,404 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 61 [2019-11-23 20:14:50,021 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 51 [2019-11-23 20:14:50,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:50,744 INFO L93 Difference]: Finished difference Result 175 states and 191 transitions. [2019-11-23 20:14:50,744 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2019-11-23 20:14:50,745 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 65 [2019-11-23 20:14:50,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:50,746 INFO L225 Difference]: With dead ends: 175 [2019-11-23 20:14:50,746 INFO L226 Difference]: Without dead ends: 153 [2019-11-23 20:14:50,751 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 33 SyntacticMatches, 11 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7026 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=1847, Invalid=24235, Unknown=0, NotChecked=0, Total=26082 [2019-11-23 20:14:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-11-23 20:14:50,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 124. [2019-11-23 20:14:50,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2019-11-23 20:14:50,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2019-11-23 20:14:50,763 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 65 [2019-11-23 20:14:50,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:50,763 INFO L462 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2019-11-23 20:14:50,763 INFO L463 AbstractCegarLoop]: Interpolant automaton has 83 states. [2019-11-23 20:14:50,764 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2019-11-23 20:14:50,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:14:50,764 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:50,764 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:50,968 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:50,968 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:50,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:50,969 INFO L82 PathProgramCache]: Analyzing trace with hash 473178144, now seen corresponding path program 13 times [2019-11-23 20:14:50,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:50,970 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209625092] [2019-11-23 20:14:50,970 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 27 proven. 34 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 20:14:51,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209625092] [2019-11-23 20:14:51,126 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552423443] [2019-11-23 20:14:51,126 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 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 20:14:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:51,196 INFO L255 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:14:51,198 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:51,461 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2019-11-23 20:14:51,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:51,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2019-11-23 20:14:51,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534397735] [2019-11-23 20:14:51,463 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:14:51,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:51,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:14:51,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:14:51,464 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand 27 states. [2019-11-23 20:14:52,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:52,140 INFO L93 Difference]: Finished difference Result 233 states and 250 transitions. [2019-11-23 20:14:52,141 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:14:52,141 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 67 [2019-11-23 20:14:52,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:52,142 INFO L225 Difference]: With dead ends: 233 [2019-11-23 20:14:52,142 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 20:14:52,143 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=308, Invalid=1252, Unknown=0, NotChecked=0, Total=1560 [2019-11-23 20:14:52,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 20:14:52,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 98. [2019-11-23 20:14:52,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 20:14:52,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2019-11-23 20:14:52,153 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 67 [2019-11-23 20:14:52,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:52,153 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2019-11-23 20:14:52,153 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:14:52,153 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2019-11-23 20:14:52,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:14:52,154 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:52,154 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:52,355 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:52,355 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:52,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:52,356 INFO L82 PathProgramCache]: Analyzing trace with hash 2014257346, now seen corresponding path program 14 times [2019-11-23 20:14:52,356 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:52,356 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261264296] [2019-11-23 20:14:52,357 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:52,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:52,478 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 45 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-23 20:14:52,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261264296] [2019-11-23 20:14:52,479 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013166316] [2019-11-23 20:14:52,479 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 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 20:14:52,531 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:14:52,531 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:14:52,532 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:14:52,534 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:14:52,732 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2019-11-23 20:14:52,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:14:52,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2019-11-23 20:14:52,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397978514] [2019-11-23 20:14:52,733 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-23 20:14:52,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:14:52,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-23 20:14:52,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2019-11-23 20:14:52,734 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 27 states. [2019-11-23 20:14:53,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:14:53,361 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2019-11-23 20:14:53,362 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:14:53,362 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 69 [2019-11-23 20:14:53,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:14:53,363 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:14:53,363 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:14:53,364 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=301, Invalid=959, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:14:53,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:14:53,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2019-11-23 20:14:53,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:14:53,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2019-11-23 20:14:53,371 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2019-11-23 20:14:53,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:14:53,371 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2019-11-23 20:14:53,371 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-23 20:14:53,371 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2019-11-23 20:14:53,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:14:53,372 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:14:53,372 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:14:53,576 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:14:53,576 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:14:53,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:14:53,577 INFO L82 PathProgramCache]: Analyzing trace with hash 209029992, now seen corresponding path program 15 times [2019-11-23 20:14:53,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:14:53,578 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928235675] [2019-11-23 20:14:53,578 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:14:53,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:14:54,680 WARN L192 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 21 [2019-11-23 20:14:54,856 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 28 [2019-11-23 20:14:55,058 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 32 [2019-11-23 20:14:55,271 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 32 [2019-11-23 20:14:55,481 WARN L192 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 34 [2019-11-23 20:14:55,702 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 33 [2019-11-23 20:14:55,919 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 36 [2019-11-23 20:14:56,142 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 39 [2019-11-23 20:14:56,372 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 41 [2019-11-23 20:14:56,608 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 38 [2019-11-23 20:14:56,814 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 35 [2019-11-23 20:14:57,050 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 39 [2019-11-23 20:14:57,302 WARN L192 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 37 [2019-11-23 20:14:57,538 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 41 [2019-11-23 20:14:57,780 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 38 [2019-11-23 20:14:58,013 WARN L192 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 40 [2019-11-23 20:14:58,270 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 37 [2019-11-23 20:14:58,495 WARN L192 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2019-11-23 20:14:58,706 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 34 [2019-11-23 20:14:58,910 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 35 [2019-11-23 20:14:59,105 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 29 [2019-11-23 20:14:59,282 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 24 [2019-11-23 20:14:59,909 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 25 [2019-11-23 20:15:00,081 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 20 [2019-11-23 20:15:00,285 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 35 [2019-11-23 20:15:00,476 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2019-11-23 20:15:00,688 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2019-11-23 20:15:00,895 WARN L192 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 36 [2019-11-23 20:15:01,116 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 41 [2019-11-23 20:15:01,338 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 41 [2019-11-23 20:15:01,558 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2019-11-23 20:15:01,776 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2019-11-23 20:15:01,973 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2019-11-23 20:15:02,359 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2019-11-23 20:15:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 7 proven. 173 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:04,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928235675] [2019-11-23 20:15:04,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162386517] [2019-11-23 20:15:04,117 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 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 20:15:04,188 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:15:04,189 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:04,191 WARN L253 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 124 conjunts are in the unsatisfiable core [2019-11-23 20:15:04,194 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:04,306 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2019-11-23 20:15:04,306 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:15:04,314 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:04,315 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:15:04,315 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2019-11-23 20:15:08,800 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:08,804 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:08,806 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:08,808 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:08,809 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:08,810 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:08,811 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:08,813 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:08,814 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:08,847 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:08,848 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 9 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 50 treesize of output 95 [2019-11-23 20:15:08,849 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,852 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,853 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,854 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,855 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,856 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,857 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,857 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,858 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,859 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,860 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,861 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,862 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,864 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,865 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,866 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,867 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,867 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,868 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,869 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,870 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,871 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,873 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,874 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,875 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,876 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,877 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,878 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,879 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,880 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,881 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,882 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,883 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,884 INFO L496 ElimStorePlain]: Start of recursive call 2: 6 dim-0 vars, End of recursive call: 6 dim-0 vars, and 5 xjuncts. [2019-11-23 20:15:08,935 INFO L567 ElimStorePlain]: treesize reduction 217, result has 12.5 percent of original size [2019-11-23 20:15:08,936 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:08,937 INFO L496 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:15:08,937 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:23 [2019-11-23 20:15:09,141 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:09,185 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:09,300 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 7 proven. 164 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-11-23 20:15:09,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:09,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 42] total 100 [2019-11-23 20:15:09,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350420131] [2019-11-23 20:15:09,301 INFO L442 AbstractCegarLoop]: Interpolant automaton has 100 states [2019-11-23 20:15:09,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:09,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2019-11-23 20:15:09,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=696, Invalid=9204, Unknown=0, NotChecked=0, Total=9900 [2019-11-23 20:15:09,302 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 100 states. [2019-11-23 20:15:13,952 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2019-11-23 20:15:14,415 WARN L192 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 80 [2019-11-23 20:15:14,797 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 65 [2019-11-23 20:15:15,255 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2019-11-23 20:15:16,229 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 65 [2019-11-23 20:15:21,241 WARN L192 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 69