/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_sum_const2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:15:15,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:15:15,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:15:15,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:15:15,853 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:15:15,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:15:15,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:15:15,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:15:15,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:15:15,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:15:15,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:15:15,863 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:15:15,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:15:15,864 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:15:15,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:15:15,867 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:15:15,867 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:15:15,868 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:15:15,870 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:15:15,873 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:15:15,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:15:15,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:15:15,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:15:15,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:15:15,881 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 20:15:15,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 20:15:15,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 20:15:15,883 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 20:15:15,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 20:15:15,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 20:15:15,885 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:15:15,886 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:15:15,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:15:15,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:15:15,889 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:15:15,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:15:15,890 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:15:15,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:15:15,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:15:15,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:15:15,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:15:15,893 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 20:15:15,917 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:15:15,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:15:15,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:15:15,920 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:15:15,920 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:15:15,920 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:15:15,921 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:15:15,921 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:15:15,921 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:15:15,922 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:15:15,922 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:15:15,922 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:15:15,922 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:15:15,922 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:15:15,923 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:15:15,923 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:15:15,923 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:15:15,923 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:15:15,923 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:15:15,925 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:15:15,926 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:15:15,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:15:15,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:15:15,926 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:15:15,926 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:15:15,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:15:15,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:15:15,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:15:15,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:15:15,928 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:15:16,196 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:15:16,209 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:15:16,212 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:15:16,213 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:15:16,214 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:15:16,214 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2019-11-23 20:15:16,286 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1a634360/3a68e7f7da194019ba38cf761e48813e/FLAG9953b37f2 [2019-11-23 20:15:16,747 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:15:16,748 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/zero_sum_const2.c [2019-11-23 20:15:16,755 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1a634360/3a68e7f7da194019ba38cf761e48813e/FLAG9953b37f2 [2019-11-23 20:15:17,145 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f1a634360/3a68e7f7da194019ba38cf761e48813e [2019-11-23 20:15:17,156 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:15:17,157 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:15:17,158 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:15:17,159 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:15:17,163 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:15:17,164 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:15:17" (1/1) ... [2019-11-23 20:15:17,168 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1348e435 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:17, skipping insertion in model container [2019-11-23 20:15:17,168 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:15:17" (1/1) ... [2019-11-23 20:15:17,176 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:15:17,194 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:15:17,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:15:17,409 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:15:17,427 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:15:17,441 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:15:17,441 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:17 WrapperNode [2019-11-23 20:15:17,441 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:15:17,442 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:15:17,442 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:15:17,442 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:15:17,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:17" (1/1) ... [2019-11-23 20:15:17,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:17" (1/1) ... [2019-11-23 20:15:17,567 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:15:17,567 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:15:17,567 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:15:17,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:15:17,576 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:17" (1/1) ... [2019-11-23 20:15:17,576 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:17" (1/1) ... [2019-11-23 20:15:17,577 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:17" (1/1) ... [2019-11-23 20:15:17,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:17" (1/1) ... [2019-11-23 20:15:17,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:17" (1/1) ... [2019-11-23 20:15:17,589 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:17" (1/1) ... [2019-11-23 20:15:17,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:17" (1/1) ... [2019-11-23 20:15:17,593 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:15:17,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:15:17,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:15:17,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:15:17,594 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:17" (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 20:15:17,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:15:17,646 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-23 20:15:17,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:15:17,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:15:17,646 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:15:17,954 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:15:17,954 INFO L284 CfgBuilder]: Removed 11 assume(true) statements. [2019-11-23 20:15:17,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:15:17 BoogieIcfgContainer [2019-11-23 20:15:17,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:15:17,957 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:15:17,957 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:15:17,971 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:15:17,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:15:17" (1/3) ... [2019-11-23 20:15:17,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430a50d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:15:17, skipping insertion in model container [2019-11-23 20:15:17,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:15:17" (2/3) ... [2019-11-23 20:15:17,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@430a50d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:15:17, skipping insertion in model container [2019-11-23 20:15:17,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:15:17" (3/3) ... [2019-11-23 20:15:17,977 INFO L109 eAbstractionObserver]: Analyzing ICFG zero_sum_const2.c [2019-11-23 20:15:17,987 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:15:17,993 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:15:18,004 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:15:18,025 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:15:18,025 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:15:18,025 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:15:18,025 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:15:18,025 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:15:18,025 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:15:18,026 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:15:18,026 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:15:18,038 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-23 20:15:18,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:15:18,044 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:18,044 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:18,045 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:18,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:18,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1122046426, now seen corresponding path program 1 times [2019-11-23 20:15:18,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:18,060 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383177400] [2019-11-23 20:15:18,060 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:18,198 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 20:15:18,200 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383177400] [2019-11-23 20:15:18,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:18,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-23 20:15:18,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142905633] [2019-11-23 20:15:18,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-23 20:15:18,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:18,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-23 20:15:18,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-23 20:15:18,220 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 2 states. [2019-11-23 20:15:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:18,237 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2019-11-23 20:15:18,237 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-23 20:15:18,238 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 15 [2019-11-23 20:15:18,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:18,246 INFO L225 Difference]: With dead ends: 45 [2019-11-23 20:15:18,246 INFO L226 Difference]: Without dead ends: 21 [2019-11-23 20:15:18,249 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 20:15:18,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2019-11-23 20:15:18,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2019-11-23 20:15:18,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-23 20:15:18,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2019-11-23 20:15:18,283 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 15 [2019-11-23 20:15:18,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:18,284 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2019-11-23 20:15:18,284 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-23 20:15:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2019-11-23 20:15:18,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-23 20:15:18,286 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:18,286 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:15:18,287 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:18,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:18,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1896542740, now seen corresponding path program 1 times [2019-11-23 20:15:18,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:18,288 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532522177] [2019-11-23 20:15:18,288 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:18,394 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 20:15:18,394 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532522177] [2019-11-23 20:15:18,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:18,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:15:18,395 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046781878] [2019-11-23 20:15:18,397 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:15:18,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:18,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:15:18,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:15:18,398 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand 4 states. [2019-11-23 20:15:18,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:18,452 INFO L93 Difference]: Finished difference Result 32 states and 39 transitions. [2019-11-23 20:15:18,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:15:18,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-23 20:15:18,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:18,454 INFO L225 Difference]: With dead ends: 32 [2019-11-23 20:15:18,454 INFO L226 Difference]: Without dead ends: 28 [2019-11-23 20:15:18,455 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 20:15:18,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-23 20:15:18,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2019-11-23 20:15:18,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:15:18,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2019-11-23 20:15:18,462 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2019-11-23 20:15:18,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:18,463 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2019-11-23 20:15:18,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:15:18,463 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2019-11-23 20:15:18,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-23 20:15:18,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:18,466 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 20:15:18,466 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:18,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:18,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1458205426, now seen corresponding path program 1 times [2019-11-23 20:15:18,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:18,467 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208279466] [2019-11-23 20:15:18,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:18,539 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 20:15:18,540 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208279466] [2019-11-23 20:15:18,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:18,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:15:18,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088387080] [2019-11-23 20:15:18,542 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:15:18,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:18,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:15:18,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:15:18,543 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 3 states. [2019-11-23 20:15:18,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:18,619 INFO L93 Difference]: Finished difference Result 53 states and 67 transitions. [2019-11-23 20:15:18,620 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:15:18,620 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2019-11-23 20:15:18,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:18,621 INFO L225 Difference]: With dead ends: 53 [2019-11-23 20:15:18,621 INFO L226 Difference]: Without dead ends: 30 [2019-11-23 20:15:18,622 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 20:15:18,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-23 20:15:18,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-23 20:15:18,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-23 20:15:18,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2019-11-23 20:15:18,628 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2019-11-23 20:15:18,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:18,629 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2019-11-23 20:15:18,629 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:15:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2019-11-23 20:15:18,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-23 20:15:18,630 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:18,630 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 20:15:18,630 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:18,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:18,631 INFO L82 PathProgramCache]: Analyzing trace with hash 477186736, now seen corresponding path program 1 times [2019-11-23 20:15:18,631 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:18,632 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667419622] [2019-11-23 20:15:18,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:18,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:18,688 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 20:15:18,688 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667419622] [2019-11-23 20:15:18,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:15:18,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-23 20:15:18,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832830090] [2019-11-23 20:15:18,690 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-23 20:15:18,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:18,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-23 20:15:18,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-23 20:15:18,691 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand 4 states. [2019-11-23 20:15:18,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:18,785 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2019-11-23 20:15:18,786 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:15:18,786 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2019-11-23 20:15:18,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:18,787 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:15:18,787 INFO L226 Difference]: Without dead ends: 31 [2019-11-23 20:15:18,788 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 20:15:18,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-11-23 20:15:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2019-11-23 20:15:18,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-23 20:15:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-23 20:15:18,794 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 19 [2019-11-23 20:15:18,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:18,794 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-23 20:15:18,794 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-23 20:15:18,794 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-23 20:15:18,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:15:18,795 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:18,795 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 20:15:18,796 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:18,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:18,796 INFO L82 PathProgramCache]: Analyzing trace with hash -2060422634, now seen corresponding path program 1 times [2019-11-23 20:15:18,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:18,799 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935088182] [2019-11-23 20:15:18,799 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:18,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:18,865 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 20:15:18,865 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935088182] [2019-11-23 20:15:18,866 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621349168] [2019-11-23 20:15:18,866 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 20:15:18,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:18,936 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:15:18,946 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:19,004 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 20:15:19,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:19,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-11-23 20:15:19,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187349943] [2019-11-23 20:15:19,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:15:19,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:19,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:15:19,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:15:19,009 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 6 states. [2019-11-23 20:15:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:19,120 INFO L93 Difference]: Finished difference Result 49 states and 57 transitions. [2019-11-23 20:15:19,120 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:15:19,120 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2019-11-23 20:15:19,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:19,121 INFO L225 Difference]: With dead ends: 49 [2019-11-23 20:15:19,121 INFO L226 Difference]: Without dead ends: 29 [2019-11-23 20:15:19,122 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 20:15:19,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-23 20:15:19,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-23 20:15:19,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-23 20:15:19,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-23 20:15:19,128 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2019-11-23 20:15:19,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:19,128 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-23 20:15:19,128 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:15:19,129 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-23 20:15:19,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-23 20:15:19,130 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:19,130 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 20:15:19,333 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:19,336 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:19,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:19,337 INFO L82 PathProgramCache]: Analyzing trace with hash -959615560, now seen corresponding path program 2 times [2019-11-23 20:15:19,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:19,337 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306516752] [2019-11-23 20:15:19,338 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:19,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:19,425 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 20:15:19,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306516752] [2019-11-23 20:15:19,425 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970583316] [2019-11-23 20:15:19,426 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 20:15:19,483 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:15:19,483 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:19,484 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:15:19,486 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:19,526 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 20:15:19,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:19,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2019-11-23 20:15:19,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889870785] [2019-11-23 20:15:19,528 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:15:19,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:19,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:15:19,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:15:19,528 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 7 states. [2019-11-23 20:15:19,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:19,672 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2019-11-23 20:15:19,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:15:19,673 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2019-11-23 20:15:19,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:19,673 INFO L225 Difference]: With dead ends: 57 [2019-11-23 20:15:19,674 INFO L226 Difference]: Without dead ends: 41 [2019-11-23 20:15:19,674 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 20:15:19,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-23 20:15:19,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2019-11-23 20:15:19,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:15:19,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2019-11-23 20:15:19,686 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2019-11-23 20:15:19,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:19,686 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2019-11-23 20:15:19,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:15:19,687 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2019-11-23 20:15:19,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-23 20:15:19,687 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:19,694 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 20:15:19,894 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:19,895 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:19,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:19,896 INFO L82 PathProgramCache]: Analyzing trace with hash -2048824896, now seen corresponding path program 3 times [2019-11-23 20:15:19,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:19,897 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197322918] [2019-11-23 20:15:19,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:20,926 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 20:15:20,928 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197322918] [2019-11-23 20:15:20,929 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340666110] [2019-11-23 20:15:20,929 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 20:15:20,987 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:15:20,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:20,989 WARN L253 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 53 conjunts are in the unsatisfiable core [2019-11-23 20:15:21,000 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:21,937 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:21,938 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 20:15:21,940 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 20:15:21,950 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:21,951 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:21,956 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 20:15:21,957 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:31 [2019-11-23 20:15:22,041 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:22,131 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:22,151 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:22,189 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 20:15:22,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:22,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 36 [2019-11-23 20:15:22,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304397840] [2019-11-23 20:15:22,190 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-23 20:15:22,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:22,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-23 20:15:22,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1140, Unknown=0, NotChecked=0, Total=1260 [2019-11-23 20:15:22,192 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand 36 states. [2019-11-23 20:15:24,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:24,322 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-11-23 20:15:24,323 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-23 20:15:24,323 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 35 [2019-11-23 20:15:24,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:24,324 INFO L225 Difference]: With dead ends: 93 [2019-11-23 20:15:24,324 INFO L226 Difference]: Without dead ends: 87 [2019-11-23 20:15:24,326 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 13 SyntacticMatches, 13 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=267, Invalid=2489, Unknown=0, NotChecked=0, Total=2756 [2019-11-23 20:15:24,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-23 20:15:24,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 53. [2019-11-23 20:15:24,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-23 20:15:24,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2019-11-23 20:15:24,336 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 35 [2019-11-23 20:15:24,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:24,336 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2019-11-23 20:15:24,336 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-23 20:15:24,336 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2019-11-23 20:15:24,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-23 20:15:24,338 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:24,338 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 20:15:24,540 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:24,541 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:24,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:24,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1772469278, now seen corresponding path program 4 times [2019-11-23 20:15:24,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:24,543 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686203742] [2019-11-23 20:15:24,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:24,619 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 20:15:24,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686203742] [2019-11-23 20:15:24,620 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743476512] [2019-11-23 20:15:24,620 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 20:15:24,663 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:15:24,664 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:24,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:15:24,667 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:24,717 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 20:15:24,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:24,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:15:24,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284639166] [2019-11-23 20:15:24,718 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:15:24,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:24,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:15:24,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:15:24,719 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 13 states. [2019-11-23 20:15:24,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:24,988 INFO L93 Difference]: Finished difference Result 121 states and 136 transitions. [2019-11-23 20:15:24,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:15:24,989 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 37 [2019-11-23 20:15:24,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:24,990 INFO L225 Difference]: With dead ends: 121 [2019-11-23 20:15:24,990 INFO L226 Difference]: Without dead ends: 72 [2019-11-23 20:15:24,994 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:15:24,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-23 20:15:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 56. [2019-11-23 20:15:25,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:15:25,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 62 transitions. [2019-11-23 20:15:25,009 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 62 transitions. Word has length 37 [2019-11-23 20:15:25,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:25,009 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 62 transitions. [2019-11-23 20:15:25,009 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:15:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 62 transitions. [2019-11-23 20:15:25,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-23 20:15:25,011 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:25,011 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 20:15:25,212 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:25,212 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:25,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:25,213 INFO L82 PathProgramCache]: Analyzing trace with hash -192826428, now seen corresponding path program 5 times [2019-11-23 20:15:25,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:25,214 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634687846] [2019-11-23 20:15:25,214 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:25,291 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 20:15:25,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634687846] [2019-11-23 20:15:25,292 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127329378] [2019-11-23 20:15:25,292 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 20:15:25,347 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2019-11-23 20:15:25,348 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:25,348 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:15:25,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:25,403 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 20:15:25,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:25,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2019-11-23 20:15:25,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546562536] [2019-11-23 20:15:25,407 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:15:25,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:25,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:15:25,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:15:25,408 INFO L87 Difference]: Start difference. First operand 56 states and 62 transitions. Second operand 13 states. [2019-11-23 20:15:25,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:25,652 INFO L93 Difference]: Finished difference Result 66 states and 72 transitions. [2019-11-23 20:15:25,653 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:15:25,653 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2019-11-23 20:15:25,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:25,653 INFO L225 Difference]: With dead ends: 66 [2019-11-23 20:15:25,654 INFO L226 Difference]: Without dead ends: 50 [2019-11-23 20:15:25,654 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:15:25,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-23 20:15:25,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2019-11-23 20:15:25,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:15:25,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2019-11-23 20:15:25,665 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 39 [2019-11-23 20:15:25,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:25,665 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2019-11-23 20:15:25,665 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:15:25,665 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2019-11-23 20:15:25,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-23 20:15:25,670 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:25,670 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 20:15:25,882 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:25,882 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:25,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:25,883 INFO L82 PathProgramCache]: Analyzing trace with hash -604138262, now seen corresponding path program 6 times [2019-11-23 20:15:25,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:25,884 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618515138] [2019-11-23 20:15:25,884 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:25,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:27,183 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 43 [2019-11-23 20:15:27,678 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2019-11-23 20:15:27,849 WARN L192 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 40 [2019-11-23 20:15:28,034 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 42 [2019-11-23 20:15:28,242 WARN L192 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2019-11-23 20:15:28,412 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2019-11-23 20:15:28,577 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2019-11-23 20:15:29,786 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:29,786 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618515138] [2019-11-23 20:15:29,787 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100940126] [2019-11-23 20:15:29,787 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 20:15:29,832 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2019-11-23 20:15:29,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:29,834 WARN L253 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 69 conjunts are in the unsatisfiable core [2019-11-23 20:15:29,836 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:32,031 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:15:32,031 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:15:32,032 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:32,033 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:32,034 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:32,035 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:15:32,036 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:15:32,051 INFO L343 Elim1Store]: treesize reduction 6, result has 68.4 percent of original size [2019-11-23 20:15:32,052 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 50 treesize of output 27 [2019-11-23 20:15:32,055 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:15:32,061 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:32,062 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:15:32,062 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:63, output treesize:3 [2019-11-23 20:15:32,084 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:32,154 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:15:32,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:32,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35] total 65 [2019-11-23 20:15:32,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314275862] [2019-11-23 20:15:32,156 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-11-23 20:15:32,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:32,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-11-23 20:15:32,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=3754, Unknown=0, NotChecked=0, Total=4160 [2019-11-23 20:15:32,158 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 65 states. [2019-11-23 20:15:33,171 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2019-11-23 20:15:35,460 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 55 [2019-11-23 20:15:37,067 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 64 [2019-11-23 20:15:37,309 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2019-11-23 20:15:37,536 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2019-11-23 20:15:38,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:38,260 INFO L93 Difference]: Finished difference Result 99 states and 109 transitions. [2019-11-23 20:15:38,260 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-23 20:15:38,260 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 45 [2019-11-23 20:15:38,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:38,262 INFO L225 Difference]: With dead ends: 99 [2019-11-23 20:15:38,262 INFO L226 Difference]: Without dead ends: 67 [2019-11-23 20:15:38,265 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 14 SyntacticMatches, 10 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3067 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=887, Invalid=7855, Unknown=0, NotChecked=0, Total=8742 [2019-11-23 20:15:38,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-23 20:15:38,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2019-11-23 20:15:38,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-11-23 20:15:38,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 64 transitions. [2019-11-23 20:15:38,273 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 64 transitions. Word has length 45 [2019-11-23 20:15:38,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:38,273 INFO L462 AbstractCegarLoop]: Abstraction has 59 states and 64 transitions. [2019-11-23 20:15:38,273 INFO L463 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-11-23 20:15:38,274 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 64 transitions. [2019-11-23 20:15:38,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-23 20:15:38,275 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:38,275 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 20:15:38,478 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:38,478 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:38,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:38,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1816234932, now seen corresponding path program 7 times [2019-11-23 20:15:38,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:38,480 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529637784] [2019-11-23 20:15:38,480 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:38,585 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 20:15:38,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529637784] [2019-11-23 20:15:38,586 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815842547] [2019-11-23 20:15:38,586 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 20:15:38,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:38,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:15:38,656 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:38,713 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 20:15:38,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:38,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-23 20:15:38,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072028679] [2019-11-23 20:15:38,714 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:15:38,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:38,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:15:38,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:15:38,715 INFO L87 Difference]: Start difference. First operand 59 states and 64 transitions. Second operand 16 states. [2019-11-23 20:15:39,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:39,020 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2019-11-23 20:15:39,020 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:15:39,020 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2019-11-23 20:15:39,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:39,021 INFO L225 Difference]: With dead ends: 141 [2019-11-23 20:15:39,021 INFO L226 Difference]: Without dead ends: 86 [2019-11-23 20:15:39,022 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2019-11-23 20:15:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-11-23 20:15:39,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 70. [2019-11-23 20:15:39,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2019-11-23 20:15:39,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 76 transitions. [2019-11-23 20:15:39,034 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 76 transitions. Word has length 47 [2019-11-23 20:15:39,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:39,034 INFO L462 AbstractCegarLoop]: Abstraction has 70 states and 76 transitions. [2019-11-23 20:15:39,034 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:15:39,034 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 76 transitions. [2019-11-23 20:15:39,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-23 20:15:39,035 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:39,035 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 20:15:39,236 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:39,236 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:39,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:39,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1992374766, now seen corresponding path program 8 times [2019-11-23 20:15:39,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:39,237 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428141613] [2019-11-23 20:15:39,237 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:39,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:39,308 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 20:15:39,308 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428141613] [2019-11-23 20:15:39,309 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336085871] [2019-11-23 20:15:39,309 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 20:15:39,356 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:15:39,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:39,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-23 20:15:39,359 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:39,426 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 20:15:39,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:39,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2019-11-23 20:15:39,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232270385] [2019-11-23 20:15:39,427 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-23 20:15:39,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:39,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-23 20:15:39,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2019-11-23 20:15:39,428 INFO L87 Difference]: Start difference. First operand 70 states and 76 transitions. Second operand 16 states. [2019-11-23 20:15:39,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:39,773 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2019-11-23 20:15:39,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:15:39,773 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 49 [2019-11-23 20:15:39,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:39,775 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:15:39,775 INFO L226 Difference]: Without dead ends: 60 [2019-11-23 20:15:39,776 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:15:39,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2019-11-23 20:15:39,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2019-11-23 20:15:39,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-23 20:15:39,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2019-11-23 20:15:39,783 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2019-11-23 20:15:39,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:39,783 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2019-11-23 20:15:39,783 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-23 20:15:39,783 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2019-11-23 20:15:39,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-23 20:15:39,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:39,785 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 20:15:39,988 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:39,988 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:39,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:39,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2047700076, now seen corresponding path program 9 times [2019-11-23 20:15:39,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:39,990 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958840021] [2019-11-23 20:15:39,990 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:40,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:41,952 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2019-11-23 20:15:42,159 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2019-11-23 20:15:42,310 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 45 [2019-11-23 20:15:42,478 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 46 [2019-11-23 20:15:42,640 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2019-11-23 20:15:42,831 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2019-11-23 20:15:43,510 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2019-11-23 20:15:43,692 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2019-11-23 20:15:43,862 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2019-11-23 20:15:44,036 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2019-11-23 20:15:44,359 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2019-11-23 20:15:45,491 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 20:15:45,491 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958840021] [2019-11-23 20:15:45,492 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96568957] [2019-11-23 20:15:45,492 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 20:15:45,547 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-11-23 20:15:45,547 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:45,549 WARN L253 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 86 conjunts are in the unsatisfiable core [2019-11-23 20:15:45,552 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:45,593 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 20:15:45,593 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:15:45,606 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:45,607 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:15:45,607 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-23 20:15:47,794 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:47,795 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:47,796 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:47,800 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:15:47,801 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:15:47,825 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:15:47,826 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 46 treesize of output 69 [2019-11-23 20:15:47,827 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:47,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:47,828 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:47,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:47,829 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:47,830 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2019-11-23 20:15:47,871 INFO L567 ElimStorePlain]: treesize reduction 92, result has 30.3 percent of original size [2019-11-23 20:15:47,872 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:47,873 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:15:47,873 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:65, output treesize:20 [2019-11-23 20:15:47,962 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:48,046 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:48,068 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:15:48,141 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 20:15:48,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:48,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 27] total 72 [2019-11-23 20:15:48,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363303942] [2019-11-23 20:15:48,142 INFO L442 AbstractCegarLoop]: Interpolant automaton has 72 states [2019-11-23 20:15:48,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:48,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2019-11-23 20:15:48,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=4528, Unknown=0, NotChecked=0, Total=5112 [2019-11-23 20:15:48,145 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 72 states. [2019-11-23 20:15:49,916 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 75 [2019-11-23 20:15:51,934 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 69 [2019-11-23 20:15:53,017 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 70 [2019-11-23 20:15:53,515 WARN L192 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 66 [2019-11-23 20:15:55,822 WARN L192 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2019-11-23 20:15:55,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:55,840 INFO L93 Difference]: Finished difference Result 96 states and 103 transitions. [2019-11-23 20:15:55,840 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-23 20:15:55,841 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 55 [2019-11-23 20:15:55,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:55,842 INFO L225 Difference]: With dead ends: 96 [2019-11-23 20:15:55,842 INFO L226 Difference]: Without dead ends: 92 [2019-11-23 20:15:55,846 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 25 SyntacticMatches, 10 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4355 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1298, Invalid=9622, Unknown=0, NotChecked=0, Total=10920 [2019-11-23 20:15:55,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-23 20:15:55,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2019-11-23 20:15:55,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-23 20:15:55,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2019-11-23 20:15:55,856 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 55 [2019-11-23 20:15:55,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:55,857 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2019-11-23 20:15:55,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 72 states. [2019-11-23 20:15:55,857 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2019-11-23 20:15:55,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-23 20:15:55,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:55,858 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 20:15:56,061 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:56,062 INFO L410 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:56,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:56,062 INFO L82 PathProgramCache]: Analyzing trace with hash -691517258, now seen corresponding path program 10 times [2019-11-23 20:15:56,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:56,063 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761490228] [2019-11-23 20:15:56,063 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:56,158 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 20:15:56,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761490228] [2019-11-23 20:15:56,158 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136977467] [2019-11-23 20:15:56,159 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 20:15:56,204 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:15:56,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:56,206 INFO L255 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:15:56,214 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:56,313 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 20:15:56,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:56,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-23 20:15:56,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324132390] [2019-11-23 20:15:56,316 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:15:56,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:56,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:15:56,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:15:56,317 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 19 states. [2019-11-23 20:15:56,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:56,688 INFO L93 Difference]: Finished difference Result 177 states and 192 transitions. [2019-11-23 20:15:56,688 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-23 20:15:56,688 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 57 [2019-11-23 20:15:56,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:56,689 INFO L225 Difference]: With dead ends: 177 [2019-11-23 20:15:56,689 INFO L226 Difference]: Without dead ends: 100 [2019-11-23 20:15:56,690 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2019-11-23 20:15:56,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2019-11-23 20:15:56,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 84. [2019-11-23 20:15:56,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-11-23 20:15:56,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2019-11-23 20:15:56,700 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 57 [2019-11-23 20:15:56,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:56,701 INFO L462 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2019-11-23 20:15:56,701 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:15:56,701 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2019-11-23 20:15:56,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-23 20:15:56,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:56,702 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 20:15:56,905 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:56,906 INFO L410 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:56,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:56,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1701588072, now seen corresponding path program 11 times [2019-11-23 20:15:56,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:56,907 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848038785] [2019-11-23 20:15:56,907 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:57,005 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 20:15:57,005 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848038785] [2019-11-23 20:15:57,006 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423253263] [2019-11-23 20:15:57,006 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 20:15:57,128 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-23 20:15:57,128 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:15:57,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-23 20:15:57,131 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:15:57,223 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 20:15:57,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:15:57,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2019-11-23 20:15:57,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754784410] [2019-11-23 20:15:57,225 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:15:57,226 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:15:57,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:15:57,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:15:57,227 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 19 states. [2019-11-23 20:15:57,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:15:57,576 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2019-11-23 20:15:57,577 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-23 20:15:57,577 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 59 [2019-11-23 20:15:57,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:15:57,577 INFO L225 Difference]: With dead ends: 94 [2019-11-23 20:15:57,578 INFO L226 Difference]: Without dead ends: 70 [2019-11-23 20:15:57,578 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2019-11-23 20:15:57,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-11-23 20:15:57,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2019-11-23 20:15:57,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-11-23 20:15:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2019-11-23 20:15:57,586 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2019-11-23 20:15:57,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:15:57,586 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2019-11-23 20:15:57,586 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:15:57,586 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2019-11-23 20:15:57,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-23 20:15:57,587 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:15:57,587 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 20:15:57,791 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:15:57,791 INFO L410 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:15:57,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:15:57,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1079638594, now seen corresponding path program 12 times [2019-11-23 20:15:57,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:15:57,792 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773609156] [2019-11-23 20:15:57,792 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:15:57,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:15:58,911 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2019-11-23 20:15:59,072 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 45 [2019-11-23 20:15:59,242 WARN L192 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2019-11-23 20:15:59,424 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2019-11-23 20:15:59,666 WARN L192 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2019-11-23 20:15:59,916 WARN L192 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 49 [2019-11-23 20:16:00,155 WARN L192 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 50 [2019-11-23 20:16:00,404 WARN L192 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2019-11-23 20:16:00,593 WARN L192 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2019-11-23 20:16:00,791 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 42 [2019-11-23 20:16:00,984 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 44 [2019-11-23 20:16:01,195 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 48 [2019-11-23 20:16:01,427 WARN L192 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2019-11-23 20:16:01,669 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2019-11-23 20:16:01,901 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2019-11-23 20:16:02,131 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2019-11-23 20:16:02,343 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2019-11-23 20:16:02,560 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2019-11-23 20:16:02,762 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 51 [2019-11-23 20:16:02,990 WARN L192 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2019-11-23 20:16:03,207 WARN L192 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 48 [2019-11-23 20:16:03,368 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 44 [2019-11-23 20:16:03,537 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2019-11-23 20:16:03,743 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2019-11-23 20:16:03,965 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2019-11-23 20:16:04,200 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2019-11-23 20:16:04,433 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2019-11-23 20:16:04,681 WARN L192 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2019-11-23 20:16:04,896 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2019-11-23 20:16:05,128 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2019-11-23 20:16:05,317 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2019-11-23 20:16:05,518 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 44 [2019-11-23 20:16:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 2 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:16:07,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773609156] [2019-11-23 20:16:07,458 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050825056] [2019-11-23 20:16:07,458 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 20:16:07,517 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-23 20:16:07,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:07,519 WARN L253 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 100 conjunts are in the unsatisfiable core [2019-11-23 20:16:07,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:07,569 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 20:16:07,570 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:16:07,581 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:16:07,581 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:16:07,582 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-23 20:16:11,199 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:16:11,212 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:16:11,213 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 36 [2019-11-23 20:16:11,213 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:16:11,245 INFO L567 ElimStorePlain]: treesize reduction 16, result has 69.2 percent of original size [2019-11-23 20:16:11,246 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:11,246 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:16:11,247 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:20 [2019-11-23 20:16:11,380 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:11,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:11,522 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:11,631 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 20:16:11,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:11,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 31] total 89 [2019-11-23 20:16:11,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898001875] [2019-11-23 20:16:11,633 INFO L442 AbstractCegarLoop]: Interpolant automaton has 89 states [2019-11-23 20:16:11,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:11,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2019-11-23 20:16:11,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=7048, Unknown=0, NotChecked=0, Total=7832 [2019-11-23 20:16:11,635 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 89 states. [2019-11-23 20:16:13,777 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2019-11-23 20:16:14,068 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2019-11-23 20:16:14,719 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 55 [2019-11-23 20:16:14,957 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 52 [2019-11-23 20:16:15,216 WARN L192 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 51 [2019-11-23 20:16:15,500 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 61 [2019-11-23 20:16:15,778 WARN L192 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 51 [2019-11-23 20:16:16,097 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 68 [2019-11-23 20:16:16,477 WARN L192 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 79 [2019-11-23 20:16:16,786 WARN L192 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 67 [2019-11-23 20:16:17,025 WARN L192 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 77 [2019-11-23 20:16:17,322 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 81 [2019-11-23 20:16:17,656 WARN L192 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2019-11-23 20:16:18,239 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2019-11-23 20:16:18,761 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 66 [2019-11-23 20:16:19,174 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 74 [2019-11-23 20:16:19,477 WARN L192 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 69 [2019-11-23 20:16:20,030 WARN L192 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 54 [2019-11-23 20:16:20,303 WARN L192 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 57 [2019-11-23 20:16:20,661 WARN L192 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2019-11-23 20:16:20,946 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 77 [2019-11-23 20:16:21,359 WARN L192 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 64 [2019-11-23 20:16:21,829 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 62 [2019-11-23 20:16:23,705 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 79 [2019-11-23 20:16:23,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:23,752 INFO L93 Difference]: Finished difference Result 124 states and 133 transitions. [2019-11-23 20:16:23,752 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-11-23 20:16:23,752 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 65 [2019-11-23 20:16:23,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:23,753 INFO L225 Difference]: With dead ends: 124 [2019-11-23 20:16:23,754 INFO L226 Difference]: Without dead ends: 120 [2019-11-23 20:16:23,759 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 27 SyntacticMatches, 11 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6831 ImplicationChecksByTransitivity, 20.9s TimeCoverageRelationStatistics Valid=1783, Invalid=15247, Unknown=0, NotChecked=0, Total=17030 [2019-11-23 20:16:23,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2019-11-23 20:16:23,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 95. [2019-11-23 20:16:23,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-23 20:16:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 102 transitions. [2019-11-23 20:16:23,770 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 102 transitions. Word has length 65 [2019-11-23 20:16:23,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:23,770 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 102 transitions. [2019-11-23 20:16:23,770 INFO L463 AbstractCegarLoop]: Interpolant automaton has 89 states. [2019-11-23 20:16:23,770 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 102 transitions. [2019-11-23 20:16:23,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-23 20:16:23,771 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:23,771 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 20:16:23,971 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:23,972 INFO L410 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:23,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:23,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1902631008, now seen corresponding path program 13 times [2019-11-23 20:16:23,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:23,974 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680641936] [2019-11-23 20:16:23,974 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:24,119 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 20:16:24,119 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680641936] [2019-11-23 20:16:24,120 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061822066] [2019-11-23 20:16:24,120 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 20:16:24,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:24,189 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:16:24,192 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:24,350 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 20:16:24,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:24,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-11-23 20:16:24,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123524830] [2019-11-23 20:16:24,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:16:24,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:24,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:16:24,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:16:24,353 INFO L87 Difference]: Start difference. First operand 95 states and 102 transitions. Second operand 22 states. [2019-11-23 20:16:24,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:24,763 INFO L93 Difference]: Finished difference Result 205 states and 220 transitions. [2019-11-23 20:16:24,763 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-23 20:16:24,763 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2019-11-23 20:16:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:24,764 INFO L225 Difference]: With dead ends: 205 [2019-11-23 20:16:24,764 INFO L226 Difference]: Without dead ends: 114 [2019-11-23 20:16:24,765 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=564, Unknown=0, NotChecked=0, Total=756 [2019-11-23 20:16:24,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2019-11-23 20:16:24,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 98. [2019-11-23 20:16:24,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2019-11-23 20:16:24,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 104 transitions. [2019-11-23 20:16:24,774 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 104 transitions. Word has length 67 [2019-11-23 20:16:24,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:24,774 INFO L462 AbstractCegarLoop]: Abstraction has 98 states and 104 transitions. [2019-11-23 20:16:24,774 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:16:24,774 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 104 transitions. [2019-11-23 20:16:24,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-23 20:16:24,775 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:24,775 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 20:16:24,975 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:24,976 INFO L410 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:24,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:24,976 INFO L82 PathProgramCache]: Analyzing trace with hash 2014257346, now seen corresponding path program 14 times [2019-11-23 20:16:24,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:24,977 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762126503] [2019-11-23 20:16:24,977 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:25,115 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 20:16:25,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762126503] [2019-11-23 20:16:25,116 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957312579] [2019-11-23 20:16:25,116 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 20:16:25,180 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:16:25,181 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:25,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:16:25,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:25,284 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 20:16:25,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:25,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2019-11-23 20:16:25,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112542683] [2019-11-23 20:16:25,286 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-23 20:16:25,286 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:25,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-23 20:16:25,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2019-11-23 20:16:25,287 INFO L87 Difference]: Start difference. First operand 98 states and 104 transitions. Second operand 22 states. [2019-11-23 20:16:25,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:16:25,886 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2019-11-23 20:16:25,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:16:25,887 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 69 [2019-11-23 20:16:25,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:16:25,888 INFO L225 Difference]: With dead ends: 108 [2019-11-23 20:16:25,888 INFO L226 Difference]: Without dead ends: 80 [2019-11-23 20:16:25,888 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=266, Invalid=856, Unknown=0, NotChecked=0, Total=1122 [2019-11-23 20:16:25,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-23 20:16:25,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 76. [2019-11-23 20:16:25,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2019-11-23 20:16:25,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2019-11-23 20:16:25,898 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 69 [2019-11-23 20:16:25,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:16:25,898 INFO L462 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2019-11-23 20:16:25,898 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-23 20:16:25,899 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2019-11-23 20:16:25,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-23 20:16:25,899 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:16:25,899 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 20:16:26,108 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:16:26,108 INFO L410 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:16:26,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:16:26,109 INFO L82 PathProgramCache]: Analyzing trace with hash 209029992, now seen corresponding path program 15 times [2019-11-23 20:16:26,109 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:16:26,109 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367941640] [2019-11-23 20:16:26,109 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:16:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:16:26,805 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 32 [2019-11-23 20:16:26,930 WARN L192 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2019-11-23 20:16:27,207 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2019-11-23 20:16:27,338 WARN L192 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2019-11-23 20:16:27,485 WARN L192 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 41 [2019-11-23 20:16:27,643 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 45 [2019-11-23 20:16:27,872 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2019-11-23 20:16:28,067 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 49 [2019-11-23 20:16:28,292 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2019-11-23 20:16:28,532 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2019-11-23 20:16:28,768 WARN L192 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2019-11-23 20:16:29,010 WARN L192 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2019-11-23 20:16:29,210 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 54 [2019-11-23 20:16:29,445 WARN L192 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2019-11-23 20:16:29,694 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2019-11-23 20:16:29,949 WARN L192 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2019-11-23 20:16:30,187 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2019-11-23 20:16:30,516 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2019-11-23 20:16:30,712 WARN L192 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 50 [2019-11-23 20:16:30,995 WARN L192 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2019-11-23 20:16:31,297 WARN L192 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 66 [2019-11-23 20:16:31,580 WARN L192 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2019-11-23 20:16:31,883 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2019-11-23 20:16:32,114 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2019-11-23 20:16:32,390 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 54 [2019-11-23 20:16:32,615 WARN L192 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 51 [2019-11-23 20:16:32,851 WARN L192 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 55 [2019-11-23 20:16:33,076 WARN L192 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2019-11-23 20:16:33,347 WARN L192 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2019-11-23 20:16:33,605 WARN L192 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2019-11-23 20:16:33,804 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 44 [2019-11-23 20:16:34,030 WARN L192 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 47 [2019-11-23 20:16:34,255 WARN L192 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2019-11-23 20:16:34,477 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2019-11-23 20:16:34,709 WARN L192 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 53 [2019-11-23 20:16:34,935 WARN L192 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 51 [2019-11-23 20:16:35,173 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 55 [2019-11-23 20:16:35,409 WARN L192 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 52 [2019-11-23 20:16:35,640 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2019-11-23 20:16:35,878 WARN L192 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2019-11-23 20:16:36,119 WARN L192 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2019-11-23 20:16:36,382 WARN L192 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2019-11-23 20:16:36,637 WARN L192 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2019-11-23 20:16:36,867 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2019-11-23 20:16:37,211 WARN L192 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2019-11-23 20:16:37,378 WARN L192 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 49 [2019-11-23 20:16:37,571 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2019-11-23 20:16:37,777 WARN L192 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 51 [2019-11-23 20:16:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 9 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-23 20:16:39,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367941640] [2019-11-23 20:16:39,262 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074321743] [2019-11-23 20:16:39,262 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 20:16:39,326 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2019-11-23 20:16:39,326 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:16:39,330 WARN L253 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 126 conjunts are in the unsatisfiable core [2019-11-23 20:16:39,333 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:16:39,450 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 20:16:39,450 INFO L496 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2019-11-23 20:16:39,465 INFO L567 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:16:39,465 INFO L496 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2019-11-23 20:16:39,466 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:21 [2019-11-23 20:16:44,492 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:44,493 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:44,494 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:44,495 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:44,497 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:44,498 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:44,499 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:44,501 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:44,502 INFO L172 IndexEqualityManager]: detected equality via solver [2019-11-23 20:16:44,504 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:44,505 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:44,508 INFO L189 IndexEqualityManager]: detected not equals via solver [2019-11-23 20:16:44,548 INFO L343 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2019-11-23 20:16:44,548 INFO L377 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 9 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 60 treesize of output 113 [2019-11-23 20:16:44,549 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,550 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,551 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,552 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,553 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,553 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,554 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,555 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,556 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,557 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,558 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,559 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,560 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,561 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,562 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,563 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,564 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,565 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,566 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,567 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,567 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,568 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,568 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,569 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,570 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,570 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,571 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,572 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,574 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,575 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,576 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,577 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,578 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,579 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,580 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,580 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,581 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,583 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,584 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,585 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,586 INFO L496 ElimStorePlain]: Start of recursive call 2: 3 dim-0 vars, End of recursive call: 3 dim-0 vars, and 4 xjuncts. [2019-11-23 20:16:44,644 INFO L567 ElimStorePlain]: treesize reduction 235, result has 13.6 percent of original size [2019-11-23 20:16:44,645 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,645 INFO L496 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2019-11-23 20:16:44,646 INFO L221 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:82, output treesize:21 [2019-11-23 20:16:44,863 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:44,901 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-23 20:16:45,058 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 20:16:45,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:16:45,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 43] total 110 [2019-11-23 20:16:45,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187395834] [2019-11-23 20:16:45,059 INFO L442 AbstractCegarLoop]: Interpolant automaton has 110 states [2019-11-23 20:16:45,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:16:45,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2019-11-23 20:16:45,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1086, Invalid=10904, Unknown=0, NotChecked=0, Total=11990 [2019-11-23 20:16:45,060 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand 110 states. [2019-11-23 20:16:48,555 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 73 [2019-11-23 20:16:48,963 WARN L192 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 97 [2019-11-23 20:16:50,189 WARN L192 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 59 [2019-11-23 20:16:50,503 WARN L192 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 55 [2019-11-23 20:16:50,855 WARN L192 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 61 [2019-11-23 20:16:51,178 WARN L192 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 59 [2019-11-23 20:16:51,511 WARN L192 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 61 [2019-11-23 20:16:51,866 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2019-11-23 20:16:52,252 WARN L192 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 71 [2019-11-23 20:16:52,623 WARN L192 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 68 [2019-11-23 20:16:52,960 WARN L192 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2019-11-23 20:16:53,691 WARN L192 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 91