/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-23 20:24:15,185 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-23 20:24:15,188 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-23 20:24:15,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-23 20:24:15,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-23 20:24:15,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-23 20:24:15,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-23 20:24:15,222 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-23 20:24:15,224 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-23 20:24:15,228 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-23 20:24:15,229 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-23 20:24:15,230 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-23 20:24:15,230 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-23 20:24:15,233 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-23 20:24:15,236 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-23 20:24:15,238 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-23 20:24:15,238 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-23 20:24:15,239 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-23 20:24:15,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-23 20:24:15,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-23 20:24:15,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-23 20:24:15,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-23 20:24:15,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-23 20:24:15,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-23 20:24:15,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-11-23 20:24:15,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-11-23 20:24:15,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-11-23 20:24:15,259 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-11-23 20:24:15,261 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-11-23 20:24:15,262 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-11-23 20:24:15,263 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-11-23 20:24:15,265 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-11-23 20:24:15,266 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-11-23 20:24:15,267 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-11-23 20:24:15,271 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-11-23 20:24:15,271 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-11-23 20:24:15,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-11-23 20:24:15,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-11-23 20:24:15,272 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-23 20:24:15,276 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-23 20:24:15,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-23 20:24:15,279 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 20:24:15,301 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-23 20:24:15,301 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-23 20:24:15,303 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-23 20:24:15,304 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-23 20:24:15,304 INFO L138 SettingsManager]: * Use SBE=true [2019-11-23 20:24:15,304 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-23 20:24:15,304 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-23 20:24:15,305 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-23 20:24:15,305 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-23 20:24:15,305 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-23 20:24:15,306 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-23 20:24:15,306 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-23 20:24:15,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-23 20:24:15,307 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2019-11-23 20:24:15,307 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-23 20:24:15,307 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-23 20:24:15,308 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-23 20:24:15,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-23 20:24:15,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-23 20:24:15,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-23 20:24:15,308 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-23 20:24:15,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-23 20:24:15,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-23 20:24:15,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-23 20:24:15,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-23 20:24:15,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-23 20:24:15,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-23 20:24:15,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-23 20:24:15,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-23 20:24:15,310 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-23 20:24:15,637 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-23 20:24:15,663 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-23 20:24:15,667 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-23 20:24:15,669 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-23 20:24:15,669 INFO L275 PluginConnector]: CDTParser initialized [2019-11-23 20:24:15,670 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2019-11-23 20:24:15,745 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ae6bbe4/f6d4d71b41294a6d92e0ae22a552a030/FLAG8a7035f5c [2019-11-23 20:24:16,238 INFO L306 CDTParser]: Found 1 translation units. [2019-11-23 20:24:16,238 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_copy8_ground-1.i [2019-11-23 20:24:16,245 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ae6bbe4/f6d4d71b41294a6d92e0ae22a552a030/FLAG8a7035f5c [2019-11-23 20:24:16,654 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e4ae6bbe4/f6d4d71b41294a6d92e0ae22a552a030 [2019-11-23 20:24:16,662 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-23 20:24:16,664 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-23 20:24:16,665 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-23 20:24:16,665 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-23 20:24:16,668 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-23 20:24:16,669 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:24:16" (1/1) ... [2019-11-23 20:24:16,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6cf039e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:16, skipping insertion in model container [2019-11-23 20:24:16,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:24:16" (1/1) ... [2019-11-23 20:24:16,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-23 20:24:16,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-23 20:24:16,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:24:16,878 INFO L203 MainTranslator]: Completed pre-run [2019-11-23 20:24:16,925 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-23 20:24:17,034 INFO L208 MainTranslator]: Completed translation [2019-11-23 20:24:17,035 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:17 WrapperNode [2019-11-23 20:24:17,035 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-23 20:24:17,036 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-23 20:24:17,036 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-23 20:24:17,036 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-23 20:24:17,043 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:17" (1/1) ... [2019-11-23 20:24:17,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:17" (1/1) ... [2019-11-23 20:24:17,086 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-23 20:24:17,086 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-23 20:24:17,086 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-23 20:24:17,086 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-23 20:24:17,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:17" (1/1) ... [2019-11-23 20:24:17,099 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:17" (1/1) ... [2019-11-23 20:24:17,103 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:17" (1/1) ... [2019-11-23 20:24:17,104 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:17" (1/1) ... [2019-11-23 20:24:17,113 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:17" (1/1) ... [2019-11-23 20:24:17,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:17" (1/1) ... [2019-11-23 20:24:17,122 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:17" (1/1) ... [2019-11-23 20:24:17,125 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-23 20:24:17,126 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-23 20:24:17,126 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-23 20:24:17,126 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-23 20:24:17,127 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:17" (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 20:24:17,187 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-23 20:24:17,187 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-23 20:24:17,188 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-23 20:24:17,188 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-23 20:24:17,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-23 20:24:17,188 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-23 20:24:17,597 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-23 20:24:17,597 INFO L284 CfgBuilder]: Removed 16 assume(true) statements. [2019-11-23 20:24:17,599 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:24:17 BoogieIcfgContainer [2019-11-23 20:24:17,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-23 20:24:17,602 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-23 20:24:17,602 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-23 20:24:17,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-23 20:24:17,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:24:16" (1/3) ... [2019-11-23 20:24:17,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bac5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:24:17, skipping insertion in model container [2019-11-23 20:24:17,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:24:17" (2/3) ... [2019-11-23 20:24:17,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bac5d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:24:17, skipping insertion in model container [2019-11-23 20:24:17,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:24:17" (3/3) ... [2019-11-23 20:24:17,612 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy8_ground-1.i [2019-11-23 20:24:17,625 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-23 20:24:17,635 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-23 20:24:17,648 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-23 20:24:17,674 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-23 20:24:17,674 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-23 20:24:17,674 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-23 20:24:17,674 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-23 20:24:17,676 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-23 20:24:17,676 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-23 20:24:17,676 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-23 20:24:17,676 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-23 20:24:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2019-11-23 20:24:17,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-23 20:24:17,702 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:17,703 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] [2019-11-23 20:24:17,703 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:17,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:17,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1852783825, now seen corresponding path program 1 times [2019-11-23 20:24:17,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:17,717 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564801629] [2019-11-23 20:24:17,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:17,902 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 20:24:17,903 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564801629] [2019-11-23 20:24:17,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:24:17,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:24:17,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325918056] [2019-11-23 20:24:17,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:24:17,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:17,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:24:17,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:24:17,926 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2019-11-23 20:24:17,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:17,963 INFO L93 Difference]: Finished difference Result 76 states and 116 transitions. [2019-11-23 20:24:17,964 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:24:17,965 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2019-11-23 20:24:17,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:17,976 INFO L225 Difference]: With dead ends: 76 [2019-11-23 20:24:17,976 INFO L226 Difference]: Without dead ends: 37 [2019-11-23 20:24:17,979 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 20:24:17,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-23 20:24:18,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2019-11-23 20:24:18,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2019-11-23 20:24:18,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2019-11-23 20:24:18,019 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 23 [2019-11-23 20:24:18,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:18,019 INFO L462 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2019-11-23 20:24:18,019 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:24:18,020 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2019-11-23 20:24:18,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-23 20:24:18,021 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:18,021 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 20:24:18,022 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:18,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:18,022 INFO L82 PathProgramCache]: Analyzing trace with hash 1595357053, now seen corresponding path program 1 times [2019-11-23 20:24:18,022 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:18,023 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930135564] [2019-11-23 20:24:18,023 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:18,085 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 20:24:18,086 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930135564] [2019-11-23 20:24:18,086 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-23 20:24:18,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-23 20:24:18,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649446279] [2019-11-23 20:24:18,089 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-23 20:24:18,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:18,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-23 20:24:18,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-23 20:24:18,090 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand 3 states. [2019-11-23 20:24:18,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:18,230 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2019-11-23 20:24:18,231 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-23 20:24:18,231 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2019-11-23 20:24:18,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:18,232 INFO L225 Difference]: With dead ends: 80 [2019-11-23 20:24:18,232 INFO L226 Difference]: Without dead ends: 52 [2019-11-23 20:24:18,233 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 20:24:18,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-23 20:24:18,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 44. [2019-11-23 20:24:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-11-23 20:24:18,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-11-23 20:24:18,242 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 25 [2019-11-23 20:24:18,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:18,242 INFO L462 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-11-23 20:24:18,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-23 20:24:18,243 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-11-23 20:24:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-23 20:24:18,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:18,244 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:24:18,244 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:18,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:18,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1558845843, now seen corresponding path program 1 times [2019-11-23 20:24:18,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:18,245 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107219053] [2019-11-23 20:24:18,246 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:18,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:24:18,392 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107219053] [2019-11-23 20:24:18,393 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006226204] [2019-11-23 20:24:18,394 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 20:24:18,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:18,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:24:18,512 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:24:18,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:18,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-11-23 20:24:18,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384165336] [2019-11-23 20:24:18,576 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-23 20:24:18,578 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:18,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-23 20:24:18,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:24:18,579 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 5 states. [2019-11-23 20:24:18,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:18,630 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2019-11-23 20:24:18,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-23 20:24:18,632 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2019-11-23 20:24:18,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:18,633 INFO L225 Difference]: With dead ends: 86 [2019-11-23 20:24:18,634 INFO L226 Difference]: Without dead ends: 47 [2019-11-23 20:24:18,635 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-11-23 20:24:18,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-23 20:24:18,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-11-23 20:24:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-23 20:24:18,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2019-11-23 20:24:18,646 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 41 [2019-11-23 20:24:18,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:18,646 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2019-11-23 20:24:18,646 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-23 20:24:18,646 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2019-11-23 20:24:18,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-23 20:24:18,648 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:18,648 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:24:18,853 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:18,854 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:18,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:18,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1389665195, now seen corresponding path program 2 times [2019-11-23 20:24:18,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:18,855 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227427931] [2019-11-23 20:24:18,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:18,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-23 20:24:18,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227427931] [2019-11-23 20:24:18,989 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877931590] [2019-11-23 20:24:18,989 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 20:24:19,066 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:24:19,067 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:19,068 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-23 20:24:19,070 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:19,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-11-23 20:24:19,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:19,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-23 20:24:19,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116390076] [2019-11-23 20:24:19,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:24:19,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:19,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:24:19,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:24:19,094 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand 7 states. [2019-11-23 20:24:19,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:19,320 INFO L93 Difference]: Finished difference Result 112 states and 138 transitions. [2019-11-23 20:24:19,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-23 20:24:19,320 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2019-11-23 20:24:19,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:19,322 INFO L225 Difference]: With dead ends: 112 [2019-11-23 20:24:19,322 INFO L226 Difference]: Without dead ends: 73 [2019-11-23 20:24:19,323 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:24:19,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-23 20:24:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2019-11-23 20:24:19,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2019-11-23 20:24:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2019-11-23 20:24:19,332 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 43 [2019-11-23 20:24:19,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:19,332 INFO L462 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2019-11-23 20:24:19,333 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:24:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2019-11-23 20:24:19,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-23 20:24:19,335 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:19,335 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:24:19,547 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:19,548 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:19,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:19,549 INFO L82 PathProgramCache]: Analyzing trace with hash -132181927, now seen corresponding path program 3 times [2019-11-23 20:24:19,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:19,549 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429292034] [2019-11-23 20:24:19,549 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:19,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:19,664 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 20:24:19,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429292034] [2019-11-23 20:24:19,664 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684787944] [2019-11-23 20:24:19,665 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 20:24:19,745 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-23 20:24:19,745 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:19,747 INFO L255 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-23 20:24:19,750 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:19,771 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2019-11-23 20:24:19,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:19,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-11-23 20:24:19,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903676283] [2019-11-23 20:24:19,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-23 20:24:19,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:19,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-23 20:24:19,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:24:19,774 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 6 states. [2019-11-23 20:24:19,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:19,952 INFO L93 Difference]: Finished difference Result 137 states and 161 transitions. [2019-11-23 20:24:19,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-23 20:24:19,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2019-11-23 20:24:19,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:19,954 INFO L225 Difference]: With dead ends: 137 [2019-11-23 20:24:19,954 INFO L226 Difference]: Without dead ends: 88 [2019-11-23 20:24:19,955 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-11-23 20:24:19,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-11-23 20:24:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2019-11-23 20:24:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-11-23 20:24:19,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2019-11-23 20:24:19,965 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 61 [2019-11-23 20:24:19,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:19,965 INFO L462 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2019-11-23 20:24:19,966 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-23 20:24:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2019-11-23 20:24:19,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-23 20:24:19,967 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:19,967 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:24:20,179 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:20,179 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:20,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:20,179 INFO L82 PathProgramCache]: Analyzing trace with hash -511310007, now seen corresponding path program 4 times [2019-11-23 20:24:20,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:20,180 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260195631] [2019-11-23 20:24:20,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:24:20,374 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260195631] [2019-11-23 20:24:20,375 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485617235] [2019-11-23 20:24:20,379 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 20:24:20,468 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:24:20,469 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:24:20,471 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:24:20,482 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:24:20,507 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:24:20,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:24:20,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-11-23 20:24:20,508 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704460819] [2019-11-23 20:24:20,508 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-23 20:24:20,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:24:20,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-23 20:24:20,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:24:20,510 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand 7 states. [2019-11-23 20:24:20,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:24:20,550 INFO L93 Difference]: Finished difference Result 154 states and 172 transitions. [2019-11-23 20:24:20,552 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-23 20:24:20,552 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 77 [2019-11-23 20:24:20,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:24:20,553 INFO L225 Difference]: With dead ends: 154 [2019-11-23 20:24:20,553 INFO L226 Difference]: Without dead ends: 83 [2019-11-23 20:24:20,554 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-11-23 20:24:20,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-23 20:24:20,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2019-11-23 20:24:20,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2019-11-23 20:24:20,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2019-11-23 20:24:20,567 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 77 [2019-11-23 20:24:20,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:24:20,567 INFO L462 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2019-11-23 20:24:20,567 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-23 20:24:20,567 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2019-11-23 20:24:20,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-23 20:24:20,570 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:24:20,572 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:24:20,776 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:24:20,784 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:24:20,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:24:20,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1970500999, now seen corresponding path program 5 times [2019-11-23 20:24:20,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:24:20,785 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573536553] [2019-11-23 20:24:20,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:24:20,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:24:20,906 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2019-11-23 20:24:20,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573536553] [2019-11-23 20:24:20,906 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375741924] [2019-11-23 20:24:20,907 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 20:25:54,848 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2019-11-23 20:25:54,848 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:54,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-23 20:25:54,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:54,936 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-11-23 20:25:54,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:54,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-11-23 20:25:54,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807385960] [2019-11-23 20:25:54,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:25:54,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:54,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:25:54,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:25:54,938 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand 11 states. [2019-11-23 20:25:55,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:55,188 INFO L93 Difference]: Finished difference Result 180 states and 206 transitions. [2019-11-23 20:25:55,189 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-23 20:25:55,189 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 79 [2019-11-23 20:25:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:55,190 INFO L225 Difference]: With dead ends: 180 [2019-11-23 20:25:55,190 INFO L226 Difference]: Without dead ends: 109 [2019-11-23 20:25:55,191 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:25:55,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-11-23 20:25:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 100. [2019-11-23 20:25:55,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2019-11-23 20:25:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2019-11-23 20:25:55,204 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 79 [2019-11-23 20:25:55,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:55,204 INFO L462 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2019-11-23 20:25:55,204 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:25:55,204 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2019-11-23 20:25:55,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-23 20:25:55,208 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:55,208 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:55,410 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:55,410 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:55,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:55,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1406577461, now seen corresponding path program 6 times [2019-11-23 20:25:55,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:55,411 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670357662] [2019-11-23 20:25:55,411 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:55,532 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2019-11-23 20:25:55,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670357662] [2019-11-23 20:25:55,533 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120272995] [2019-11-23 20:25:55,533 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 20:25:56,933 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2019-11-23 20:25:56,934 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:56,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-23 20:25:56,940 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:57,003 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2019-11-23 20:25:57,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:57,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-11-23 20:25:57,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468735657] [2019-11-23 20:25:57,004 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-23 20:25:57,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:57,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-23 20:25:57,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:25:57,005 INFO L87 Difference]: Start difference. First operand 100 states and 109 transitions. Second operand 13 states. [2019-11-23 20:25:57,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:57,283 INFO L93 Difference]: Finished difference Result 214 states and 240 transitions. [2019-11-23 20:25:57,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-23 20:25:57,292 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2019-11-23 20:25:57,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:57,293 INFO L225 Difference]: With dead ends: 214 [2019-11-23 20:25:57,293 INFO L226 Difference]: Without dead ends: 127 [2019-11-23 20:25:57,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-11-23 20:25:57,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-23 20:25:57,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 118. [2019-11-23 20:25:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2019-11-23 20:25:57,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 127 transitions. [2019-11-23 20:25:57,303 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 127 transitions. Word has length 97 [2019-11-23 20:25:57,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:57,306 INFO L462 AbstractCegarLoop]: Abstraction has 118 states and 127 transitions. [2019-11-23 20:25:57,306 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-23 20:25:57,306 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 127 transitions. [2019-11-23 20:25:57,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-11-23 20:25:57,311 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:57,312 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:57,517 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:57,517 INFO L410 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:57,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:57,518 INFO L82 PathProgramCache]: Analyzing trace with hash -321547933, now seen corresponding path program 7 times [2019-11-23 20:25:57,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:57,519 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490055575] [2019-11-23 20:25:57,519 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-11-23 20:25:57,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490055575] [2019-11-23 20:25:57,646 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103552246] [2019-11-23 20:25:57,646 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 20:25:57,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:57,729 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-23 20:25:57,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:57,751 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-11-23 20:25:57,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:57,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2019-11-23 20:25:57,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629361384] [2019-11-23 20:25:57,753 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-23 20:25:57,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:57,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-23 20:25:57,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:25:57,754 INFO L87 Difference]: Start difference. First operand 118 states and 127 transitions. Second operand 10 states. [2019-11-23 20:25:57,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:57,783 INFO L93 Difference]: Finished difference Result 224 states and 242 transitions. [2019-11-23 20:25:57,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-23 20:25:57,783 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 115 [2019-11-23 20:25:57,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:57,784 INFO L225 Difference]: With dead ends: 224 [2019-11-23 20:25:57,784 INFO L226 Difference]: Without dead ends: 121 [2019-11-23 20:25:57,785 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2019-11-23 20:25:57,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2019-11-23 20:25:57,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2019-11-23 20:25:57,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2019-11-23 20:25:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 129 transitions. [2019-11-23 20:25:57,793 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 129 transitions. Word has length 115 [2019-11-23 20:25:57,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:57,793 INFO L462 AbstractCegarLoop]: Abstraction has 120 states and 129 transitions. [2019-11-23 20:25:57,793 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-23 20:25:57,794 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 129 transitions. [2019-11-23 20:25:57,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2019-11-23 20:25:57,795 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:57,795 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:57,998 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:57,999 INFO L410 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:58,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:58,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1065115937, now seen corresponding path program 8 times [2019-11-23 20:25:58,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:58,001 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101710350] [2019-11-23 20:25:58,001 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:58,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:58,138 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-11-23 20:25:58,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101710350] [2019-11-23 20:25:58,139 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731708574] [2019-11-23 20:25:58,139 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 20:25:58,237 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-23 20:25:58,237 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:25:58,239 INFO L255 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:25:58,241 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:25:58,264 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-11-23 20:25:58,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:25:58,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:25:58,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374133202] [2019-11-23 20:25:58,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:25:58,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:25:58,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:25:58,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:25:58,267 INFO L87 Difference]: Start difference. First operand 120 states and 129 transitions. Second operand 11 states. [2019-11-23 20:25:58,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:25:58,301 INFO L93 Difference]: Finished difference Result 226 states and 244 transitions. [2019-11-23 20:25:58,301 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:25:58,301 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 117 [2019-11-23 20:25:58,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:25:58,302 INFO L225 Difference]: With dead ends: 226 [2019-11-23 20:25:58,302 INFO L226 Difference]: Without dead ends: 123 [2019-11-23 20:25:58,304 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:25:58,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-23 20:25:58,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 122. [2019-11-23 20:25:58,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2019-11-23 20:25:58,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 131 transitions. [2019-11-23 20:25:58,323 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 131 transitions. Word has length 117 [2019-11-23 20:25:58,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:25:58,324 INFO L462 AbstractCegarLoop]: Abstraction has 122 states and 131 transitions. [2019-11-23 20:25:58,324 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:25:58,324 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 131 transitions. [2019-11-23 20:25:58,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2019-11-23 20:25:58,325 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:25:58,325 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-23 20:25:58,526 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:25:58,526 INFO L410 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:25:58,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:25:58,527 INFO L82 PathProgramCache]: Analyzing trace with hash -2085734049, now seen corresponding path program 9 times [2019-11-23 20:25:58,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:25:58,528 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637492731] [2019-11-23 20:25:58,528 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:25:58,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:25:58,666 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2019-11-23 20:25:58,666 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637492731] [2019-11-23 20:25:58,668 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638499622] [2019-11-23 20:25:58,668 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 20:26:00,865 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-23 20:26:00,866 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:00,869 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-23 20:26:00,872 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:00,980 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 230 trivial. 0 not checked. [2019-11-23 20:26:00,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:00,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-11-23 20:26:00,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915019997] [2019-11-23 20:26:00,982 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-23 20:26:00,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:00,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-23 20:26:00,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:26:00,983 INFO L87 Difference]: Start difference. First operand 122 states and 131 transitions. Second operand 19 states. [2019-11-23 20:26:01,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:01,359 INFO L93 Difference]: Finished difference Result 260 states and 294 transitions. [2019-11-23 20:26:01,359 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-23 20:26:01,360 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 119 [2019-11-23 20:26:01,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:01,361 INFO L225 Difference]: With dead ends: 260 [2019-11-23 20:26:01,361 INFO L226 Difference]: Without dead ends: 157 [2019-11-23 20:26:01,362 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-11-23 20:26:01,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2019-11-23 20:26:01,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2019-11-23 20:26:01,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2019-11-23 20:26:01,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 165 transitions. [2019-11-23 20:26:01,368 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 165 transitions. Word has length 119 [2019-11-23 20:26:01,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:01,368 INFO L462 AbstractCegarLoop]: Abstraction has 156 states and 165 transitions. [2019-11-23 20:26:01,369 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-23 20:26:01,369 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 165 transitions. [2019-11-23 20:26:01,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2019-11-23 20:26:01,370 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:01,370 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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 20:26:01,572 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:01,573 INFO L410 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:01,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:01,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1648609283, now seen corresponding path program 10 times [2019-11-23 20:26:01,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:01,574 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406812955] [2019-11-23 20:26:01,574 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:01,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:01,711 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2019-11-23 20:26:01,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406812955] [2019-11-23 20:26:01,712 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827619092] [2019-11-23 20:26:01,712 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 20:26:01,811 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-23 20:26:01,811 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-23 20:26:01,813 INFO L255 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-23 20:26:01,816 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-23 20:26:01,843 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2019-11-23 20:26:01,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-23 20:26:01,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-11-23 20:26:01,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101405015] [2019-11-23 20:26:01,845 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-23 20:26:01,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-23 20:26:01,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-23 20:26:01,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:26:01,845 INFO L87 Difference]: Start difference. First operand 156 states and 165 transitions. Second operand 11 states. [2019-11-23 20:26:02,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-23 20:26:02,167 INFO L93 Difference]: Finished difference Result 299 states and 323 transitions. [2019-11-23 20:26:02,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-23 20:26:02,167 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 153 [2019-11-23 20:26:02,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-23 20:26:02,169 INFO L225 Difference]: With dead ends: 299 [2019-11-23 20:26:02,169 INFO L226 Difference]: Without dead ends: 180 [2019-11-23 20:26:02,169 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2019-11-23 20:26:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2019-11-23 20:26:02,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2019-11-23 20:26:02,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-23 20:26:02,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 181 transitions. [2019-11-23 20:26:02,176 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 181 transitions. Word has length 153 [2019-11-23 20:26:02,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-23 20:26:02,177 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 181 transitions. [2019-11-23 20:26:02,177 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-23 20:26:02,177 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 181 transitions. [2019-11-23 20:26:02,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2019-11-23 20:26:02,178 INFO L402 BasicCegarLoop]: Found error trace [2019-11-23 20:26:02,179 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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 20:26:02,382 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-23 20:26:02,383 INFO L410 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-23 20:26:02,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-23 20:26:02,383 INFO L82 PathProgramCache]: Analyzing trace with hash -722393363, now seen corresponding path program 11 times [2019-11-23 20:26:02,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-23 20:26:02,384 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216179650] [2019-11-23 20:26:02,384 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-23 20:26:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-23 20:26:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 529 trivial. 0 not checked. [2019-11-23 20:26:02,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216179650] [2019-11-23 20:26:02,553 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591021071] [2019-11-23 20:26:02,553 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