/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops-crafted-1/nested3-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 04:44:27,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 04:44:27,117 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 04:44:27,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 04:44:27,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 04:44:27,160 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 04:44:27,162 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 04:44:27,165 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 04:44:27,167 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 04:44:27,168 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 04:44:27,170 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 04:44:27,171 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 04:44:27,172 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 04:44:27,173 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 04:44:27,175 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 04:44:27,176 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 04:44:27,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 04:44:27,179 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 04:44:27,181 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 04:44:27,184 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 04:44:27,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 04:44:27,188 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 04:44:27,190 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 04:44:27,191 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 04:44:27,195 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 04:44:27,208 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 04:44:27,209 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 04:44:27,210 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 04:44:27,211 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 04:44:27,213 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 04:44:27,213 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 04:44:27,214 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 04:44:27,214 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 04:44:27,215 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 04:44:27,216 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 04:44:27,217 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 04:44:27,218 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 04:44:27,248 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 04:44:27,248 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 04:44:27,250 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 04:44:27,250 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 04:44:27,250 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 04:44:27,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 04:44:27,251 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 04:44:27,251 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 04:44:27,252 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 04:44:27,252 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 04:44:27,252 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 04:44:27,252 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 04:44:27,253 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 04:44:27,253 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 04:44:27,253 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 04:44:27,253 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 04:44:27,254 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 04:44:27,254 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:44:27,254 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 04:44:27,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 04:44:27,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 04:44:27,255 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 04:44:27,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 04:44:27,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 04:44:27,256 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 04:44:27,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 04:44:27,740 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 04:44:27,778 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 04:44:27,782 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 04:44:27,784 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 04:44:27,785 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 04:44:27,786 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/nested3-1.c [2020-12-22 04:44:27,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df2b96a36/b636098994ad4b899f3ab3be547e8c85/FLAGee21baba6 [2020-12-22 04:44:28,608 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 04:44:28,609 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-1.c [2020-12-22 04:44:28,616 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df2b96a36/b636098994ad4b899f3ab3be547e8c85/FLAGee21baba6 [2020-12-22 04:44:28,976 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/df2b96a36/b636098994ad4b899f3ab3be547e8c85 [2020-12-22 04:44:28,980 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 04:44:28,983 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 04:44:28,988 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 04:44:28,988 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 04:44:28,992 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 04:44:28,994 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:44:28" (1/1) ... [2020-12-22 04:44:28,996 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@163ce1c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:28, skipping insertion in model container [2020-12-22 04:44:28,996 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 04:44:28" (1/1) ... [2020-12-22 04:44:29,005 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 04:44:29,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 04:44:29,183 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2020-12-22 04:44:29,200 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:44:29,211 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 04:44:29,226 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/nested3-1.c[321,334] [2020-12-22 04:44:29,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 04:44:29,250 INFO L208 MainTranslator]: Completed translation [2020-12-22 04:44:29,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:29 WrapperNode [2020-12-22 04:44:29,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 04:44:29,252 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 04:44:29,253 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 04:44:29,253 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 04:44:29,263 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:29" (1/1) ... [2020-12-22 04:44:29,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:29" (1/1) ... [2020-12-22 04:44:29,299 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 04:44:29,300 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 04:44:29,300 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 04:44:29,300 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 04:44:29,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:29" (1/1) ... [2020-12-22 04:44:29,312 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:29" (1/1) ... [2020-12-22 04:44:29,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:29" (1/1) ... [2020-12-22 04:44:29,315 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:29" (1/1) ... [2020-12-22 04:44:29,320 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:29" (1/1) ... [2020-12-22 04:44:29,326 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:29" (1/1) ... [2020-12-22 04:44:29,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:29" (1/1) ... [2020-12-22 04:44:29,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 04:44:29,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 04:44:29,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 04:44:29,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 04:44:29,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 04:44:29,448 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 04:44:29,449 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 04:44:29,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 04:44:29,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 04:44:29,846 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 04:44:29,846 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 04:44:29,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:44:29 BoogieIcfgContainer [2020-12-22 04:44:29,853 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 04:44:29,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 04:44:29,859 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 04:44:29,869 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 04:44:29,870 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 04:44:28" (1/3) ... [2020-12-22 04:44:29,871 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63251bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:44:29, skipping insertion in model container [2020-12-22 04:44:29,871 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 04:44:29" (2/3) ... [2020-12-22 04:44:29,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63251bae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 04:44:29, skipping insertion in model container [2020-12-22 04:44:29,875 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 04:44:29" (3/3) ... [2020-12-22 04:44:29,879 INFO L111 eAbstractionObserver]: Analyzing ICFG nested3-1.c [2020-12-22 04:44:29,895 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 04:44:29,908 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 04:44:29,938 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 04:44:29,969 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 04:44:29,969 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 04:44:29,969 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 04:44:29,969 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 04:44:29,970 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 04:44:29,970 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 04:44:29,997 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 04:44:29,998 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 04:44:30,044 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-22 04:44:30,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 04:44:30,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:30,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 04:44:30,062 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:30,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:30,072 INFO L82 PathProgramCache]: Analyzing trace with hash 889681499, now seen corresponding path program 1 times [2020-12-22 04:44:30,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:30,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182157831] [2020-12-22 04:44:30,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:30,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:30,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182157831] [2020-12-22 04:44:30,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:44:30,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:44:30,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692861459] [2020-12-22 04:44:30,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:44:30,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:30,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:44:30,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:44:30,351 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 3 states. [2020-12-22 04:44:30,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:30,399 INFO L93 Difference]: Finished difference Result 57 states and 81 transitions. [2020-12-22 04:44:30,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:44:30,402 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-22 04:44:30,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:30,414 INFO L225 Difference]: With dead ends: 57 [2020-12-22 04:44:30,415 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 04:44:30,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:44:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 04:44:30,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 20. [2020-12-22 04:44:30,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 04:44:30,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-22 04:44:30,461 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 6 [2020-12-22 04:44:30,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:30,462 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-22 04:44:30,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:44:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-22 04:44:30,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-22 04:44:30,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:30,463 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:30,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 04:44:30,464 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:30,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:30,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1810811368, now seen corresponding path program 1 times [2020-12-22 04:44:30,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:30,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561425865] [2020-12-22 04:44:30,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:30,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:30,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561425865] [2020-12-22 04:44:30,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:44:30,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:44:30,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506502712] [2020-12-22 04:44:30,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:44:30,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:30,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:44:30,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:44:30,536 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 3 states. [2020-12-22 04:44:30,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:30,600 INFO L93 Difference]: Finished difference Result 44 states and 50 transitions. [2020-12-22 04:44:30,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:44:30,601 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2020-12-22 04:44:30,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:30,603 INFO L225 Difference]: With dead ends: 44 [2020-12-22 04:44:30,604 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 04:44:30,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:44:30,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 04:44:30,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2020-12-22 04:44:30,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-12-22 04:44:30,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-12-22 04:44:30,618 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 7 [2020-12-22 04:44:30,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:30,619 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-12-22 04:44:30,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:44:30,620 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-12-22 04:44:30,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 04:44:30,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:30,621 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:30,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 04:44:30,622 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:30,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:30,626 INFO L82 PathProgramCache]: Analyzing trace with hash 301781204, now seen corresponding path program 1 times [2020-12-22 04:44:30,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:30,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41898955] [2020-12-22 04:44:30,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:30,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:30,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41898955] [2020-12-22 04:44:30,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 04:44:30,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 04:44:30,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661689405] [2020-12-22 04:44:30,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 04:44:30,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:30,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 04:44:30,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:44:30,701 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 3 states. [2020-12-22 04:44:30,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:30,722 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-12-22 04:44:30,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 04:44:30,727 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 8 [2020-12-22 04:44:30,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:30,728 INFO L225 Difference]: With dead ends: 41 [2020-12-22 04:44:30,728 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 04:44:30,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 04:44:30,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 04:44:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-22 04:44:30,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:44:30,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-22 04:44:30,739 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 8 [2020-12-22 04:44:30,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:30,743 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-22 04:44:30,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 04:44:30,743 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-22 04:44:30,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 04:44:30,744 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:30,744 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:30,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 04:44:30,744 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:30,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:30,747 INFO L82 PathProgramCache]: Analyzing trace with hash 766948121, now seen corresponding path program 1 times [2020-12-22 04:44:30,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:30,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149880911] [2020-12-22 04:44:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:30,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:30,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149880911] [2020-12-22 04:44:30,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772948897] [2020-12-22 04:44:30,915 INFO L95 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 [2020-12-22 04:44:30,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:30,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 04:44:30,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:31,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:31,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 04:44:31,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235334362] [2020-12-22 04:44:31,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:44:31,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:31,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:44:31,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:44:31,049 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 5 states. [2020-12-22 04:44:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:31,081 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-12-22 04:44:31,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 04:44:31,082 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 04:44:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:31,083 INFO L225 Difference]: With dead ends: 43 [2020-12-22 04:44:31,083 INFO L226 Difference]: Without dead ends: 24 [2020-12-22 04:44:31,084 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 04:44:31,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-12-22 04:44:31,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-12-22 04:44:31,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-22 04:44:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-12-22 04:44:31,089 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 9 [2020-12-22 04:44:31,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:31,089 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-12-22 04:44:31,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:44:31,089 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-12-22 04:44:31,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 04:44:31,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:31,090 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:31,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:31,305 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:31,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:31,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1992746636, now seen corresponding path program 2 times [2020-12-22 04:44:31,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:31,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944669013] [2020-12-22 04:44:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:31,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944669013] [2020-12-22 04:44:31,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796182863] [2020-12-22 04:44:31,458 INFO L93 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 [2020-12-22 04:44:31,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:44:31,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:31,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 04:44:31,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:31,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:31,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:31,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 04:44:31,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098571696] [2020-12-22 04:44:31,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 04:44:31,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:31,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 04:44:31,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:44:31,630 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 6 states. [2020-12-22 04:44:31,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:31,684 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-12-22 04:44:31,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 04:44:31,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 04:44:31,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:31,685 INFO L225 Difference]: With dead ends: 45 [2020-12-22 04:44:31,685 INFO L226 Difference]: Without dead ends: 25 [2020-12-22 04:44:31,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 04:44:31,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-12-22 04:44:31,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-12-22 04:44:31,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-22 04:44:31,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-12-22 04:44:31,701 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2020-12-22 04:44:31,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:31,702 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-12-22 04:44:31,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 04:44:31,702 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-12-22 04:44:31,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 04:44:31,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:31,703 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:31,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:31,922 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:31,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:31,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1643938183, now seen corresponding path program 3 times [2020-12-22 04:44:31,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:31,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168766516] [2020-12-22 04:44:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:31,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:32,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:32,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168766516] [2020-12-22 04:44:32,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649206166] [2020-12-22 04:44:32,150 INFO L93 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 [2020-12-22 04:44:32,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 04:44:32,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:32,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:44:32,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:32,528 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 04:44:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 04:44:32,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 04:44:32,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-12-22 04:44:32,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809575020] [2020-12-22 04:44:32,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 04:44:32,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:32,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 04:44:32,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:44:32,872 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-12-22 04:44:33,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:33,240 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-12-22 04:44:33,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 04:44:33,241 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-22 04:44:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:33,242 INFO L225 Difference]: With dead ends: 30 [2020-12-22 04:44:33,242 INFO L226 Difference]: Without dead ends: 28 [2020-12-22 04:44:33,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:44:33,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-12-22 04:44:33,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-12-22 04:44:33,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 04:44:33,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-22 04:44:33,249 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 11 [2020-12-22 04:44:33,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:33,249 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-22 04:44:33,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 04:44:33,250 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-22 04:44:33,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 04:44:33,250 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:33,250 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:33,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:33,465 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:33,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:33,467 INFO L82 PathProgramCache]: Analyzing trace with hash -475837606, now seen corresponding path program 1 times [2020-12-22 04:44:33,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:33,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90149087] [2020-12-22 04:44:33,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:33,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 04:44:33,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90149087] [2020-12-22 04:44:33,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480601224] [2020-12-22 04:44:33,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2020-12-22 04:44:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:33,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 04:44:33,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:33,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 04:44:33,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:33,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 04:44:33,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767421281] [2020-12-22 04:44:33,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:44:33,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:33,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:44:33,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:44:33,750 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 10 states. [2020-12-22 04:44:34,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:34,059 INFO L93 Difference]: Finished difference Result 60 states and 70 transitions. [2020-12-22 04:44:34,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:44:34,060 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-12-22 04:44:34,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:34,061 INFO L225 Difference]: With dead ends: 60 [2020-12-22 04:44:34,061 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 04:44:34,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-22 04:44:34,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 04:44:34,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2020-12-22 04:44:34,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 04:44:34,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-12-22 04:44:34,072 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 15 [2020-12-22 04:44:34,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:34,072 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-12-22 04:44:34,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:44:34,072 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-12-22 04:44:34,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 04:44:34,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:34,073 INFO L422 BasicCegarLoop]: trace histogram [8, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:34,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:34,289 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:34,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:34,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1709705080, now seen corresponding path program 2 times [2020-12-22 04:44:34,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:34,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589022427] [2020-12-22 04:44:34,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 10 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 04:44:34,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589022427] [2020-12-22 04:44:34,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757572849] [2020-12-22 04:44:34,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2020-12-22 04:44:34,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:44:34,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:34,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 04:44:34,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-12-22 04:44:34,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:34,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2020-12-22 04:44:34,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780426332] [2020-12-22 04:44:34,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:44:34,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:34,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:44:34,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:44:34,737 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 13 states. [2020-12-22 04:44:35,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:35,169 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-12-22 04:44:35,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 04:44:35,170 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 25 [2020-12-22 04:44:35,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:35,177 INFO L225 Difference]: With dead ends: 83 [2020-12-22 04:44:35,177 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 04:44:35,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:44:35,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 04:44:35,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2020-12-22 04:44:35,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 04:44:35,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2020-12-22 04:44:35,205 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 25 [2020-12-22 04:44:35,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:35,205 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2020-12-22 04:44:35,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:44:35,206 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2020-12-22 04:44:35,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-12-22 04:44:35,210 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:35,210 INFO L422 BasicCegarLoop]: trace histogram [15, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:35,426 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:35,427 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:35,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:35,428 INFO L82 PathProgramCache]: Analyzing trace with hash 91069662, now seen corresponding path program 3 times [2020-12-22 04:44:35,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:35,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339178774] [2020-12-22 04:44:35,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 75 proven. 15 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2020-12-22 04:44:35,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339178774] [2020-12-22 04:44:35,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092348884] [2020-12-22 04:44:35,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-12-22 04:44:35,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 04:44:35,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:35,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:44:35,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:35,798 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 81 proven. 15 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-12-22 04:44:35,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:35,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 04:44:35,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978592732] [2020-12-22 04:44:35,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 04:44:35,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:35,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 04:44:35,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:44:35,801 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand 9 states. [2020-12-22 04:44:35,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:35,860 INFO L93 Difference]: Finished difference Result 89 states and 100 transitions. [2020-12-22 04:44:35,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 04:44:35,863 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-12-22 04:44:35,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:35,863 INFO L225 Difference]: With dead ends: 89 [2020-12-22 04:44:35,863 INFO L226 Difference]: Without dead ends: 48 [2020-12-22 04:44:35,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 04:44:35,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-12-22 04:44:35,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-12-22 04:44:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 04:44:35,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2020-12-22 04:44:35,877 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 37 [2020-12-22 04:44:35,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:35,878 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2020-12-22 04:44:35,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 04:44:35,878 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2020-12-22 04:44:35,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 04:44:35,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:35,879 INFO L422 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:36,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:36,084 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:36,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:36,085 INFO L82 PathProgramCache]: Analyzing trace with hash 150465589, now seen corresponding path program 4 times [2020-12-22 04:44:36,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:36,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280057354] [2020-12-22 04:44:36,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:36,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:36,245 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-12-22 04:44:36,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280057354] [2020-12-22 04:44:36,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589470641] [2020-12-22 04:44:36,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:36,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:44:36,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:36,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:44:36,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:36,385 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 101 proven. 21 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2020-12-22 04:44:36,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:36,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 04:44:36,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463189218] [2020-12-22 04:44:36,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 04:44:36,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:36,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 04:44:36,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:44:36,388 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 10 states. [2020-12-22 04:44:36,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:36,457 INFO L93 Difference]: Finished difference Result 95 states and 106 transitions. [2020-12-22 04:44:36,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 04:44:36,458 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-12-22 04:44:36,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:36,459 INFO L225 Difference]: With dead ends: 95 [2020-12-22 04:44:36,459 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 04:44:36,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 04:44:36,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 04:44:36,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2020-12-22 04:44:36,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 04:44:36,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-22 04:44:36,473 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 40 [2020-12-22 04:44:36,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:36,473 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-22 04:44:36,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 04:44:36,473 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-22 04:44:36,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 04:44:36,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:36,475 INFO L422 BasicCegarLoop]: trace histogram [21, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:36,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 04:44:36,690 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:36,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:36,692 INFO L82 PathProgramCache]: Analyzing trace with hash 105458046, now seen corresponding path program 5 times [2020-12-22 04:44:36,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:36,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879739822] [2020-12-22 04:44:36,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:36,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:36,873 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 131 proven. 28 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2020-12-22 04:44:36,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879739822] [2020-12-22 04:44:36,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381787203] [2020-12-22 04:44:36,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:36,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 04:44:36,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:36,973 WARN L261 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 04:44:36,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 291 backedges. 202 proven. 28 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2020-12-22 04:44:37,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:37,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 04:44:37,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743961794] [2020-12-22 04:44:37,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 04:44:37,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:37,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 04:44:37,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:44:37,084 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 11 states. [2020-12-22 04:44:37,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:37,169 INFO L93 Difference]: Finished difference Result 101 states and 112 transitions. [2020-12-22 04:44:37,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 04:44:37,170 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-12-22 04:44:37,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:37,171 INFO L225 Difference]: With dead ends: 101 [2020-12-22 04:44:37,171 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 04:44:37,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 04:44:37,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 04:44:37,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-12-22 04:44:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 04:44:37,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2020-12-22 04:44:37,185 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 43 [2020-12-22 04:44:37,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:37,186 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2020-12-22 04:44:37,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 04:44:37,186 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2020-12-22 04:44:37,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 04:44:37,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:37,187 INFO L422 BasicCegarLoop]: trace histogram [24, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:37,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 04:44:37,396 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:37,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:37,397 INFO L82 PathProgramCache]: Analyzing trace with hash 863291797, now seen corresponding path program 6 times [2020-12-22 04:44:37,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:37,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973077630] [2020-12-22 04:44:37,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:37,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:37,562 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 165 proven. 36 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-12-22 04:44:37,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973077630] [2020-12-22 04:44:37,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039532784] [2020-12-22 04:44:37,563 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:38,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-22 04:44:38,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:38,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:44:38,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:38,226 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 253 proven. 36 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-22 04:44:38,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:38,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 04:44:38,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086022885] [2020-12-22 04:44:38,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 04:44:38,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:38,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 04:44:38,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:44:38,228 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 12 states. [2020-12-22 04:44:38,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:38,324 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2020-12-22 04:44:38,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 04:44:38,325 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-12-22 04:44:38,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:38,326 INFO L225 Difference]: With dead ends: 107 [2020-12-22 04:44:38,326 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 04:44:38,327 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 04:44:38,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 04:44:38,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-12-22 04:44:38,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 04:44:38,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-12-22 04:44:38,341 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 46 [2020-12-22 04:44:38,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:38,341 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-12-22 04:44:38,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 04:44:38,341 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-12-22 04:44:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-12-22 04:44:38,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:38,343 INFO L422 BasicCegarLoop]: trace histogram [27, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:38,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:38,551 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:38,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:38,552 INFO L82 PathProgramCache]: Analyzing trace with hash 536100382, now seen corresponding path program 7 times [2020-12-22 04:44:38,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:38,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756754192] [2020-12-22 04:44:38,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:38,736 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 203 proven. 45 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2020-12-22 04:44:38,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756754192] [2020-12-22 04:44:38,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665473762] [2020-12-22 04:44:38,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:38,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 04:44:38,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 450 backedges. 203 proven. 45 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2020-12-22 04:44:38,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:38,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 04:44:38,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476784915] [2020-12-22 04:44:38,888 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 04:44:38,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:38,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 04:44:38,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:44:38,889 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 13 states. [2020-12-22 04:44:38,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:38,989 INFO L93 Difference]: Finished difference Result 113 states and 124 transitions. [2020-12-22 04:44:38,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 04:44:38,990 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-12-22 04:44:38,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:38,991 INFO L225 Difference]: With dead ends: 113 [2020-12-22 04:44:38,991 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 04:44:38,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 04:44:38,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 04:44:39,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-12-22 04:44:39,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 04:44:39,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2020-12-22 04:44:39,005 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 49 [2020-12-22 04:44:39,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:39,006 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2020-12-22 04:44:39,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 04:44:39,006 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2020-12-22 04:44:39,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 04:44:39,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:39,007 INFO L422 BasicCegarLoop]: trace histogram [30, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:39,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:39,220 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:39,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2070536459, now seen corresponding path program 8 times [2020-12-22 04:44:39,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:39,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447870724] [2020-12-22 04:44:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:39,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:39,490 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 245 proven. 55 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-12-22 04:44:39,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447870724] [2020-12-22 04:44:39,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139124311] [2020-12-22 04:44:39,491 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:39,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:44:39,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:39,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 04:44:39,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2020-12-22 04:44:39,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:39,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 6] total 17 [2020-12-22 04:44:39,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425429969] [2020-12-22 04:44:39,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:44:39,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:39,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:44:39,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:44:39,682 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 17 states. [2020-12-22 04:44:40,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:40,940 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2020-12-22 04:44:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-22 04:44:40,940 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 52 [2020-12-22 04:44:40,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:40,941 INFO L225 Difference]: With dead ends: 150 [2020-12-22 04:44:40,941 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 04:44:40,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 950 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=297, Invalid=3363, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 04:44:40,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 04:44:40,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 78. [2020-12-22 04:44:40,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 04:44:40,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-12-22 04:44:40,962 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 52 [2020-12-22 04:44:40,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:40,962 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-12-22 04:44:40,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:44:40,962 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-12-22 04:44:40,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 04:44:40,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:40,964 INFO L422 BasicCegarLoop]: trace histogram [44, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:41,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 04:44:41,180 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:41,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:41,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1290530224, now seen corresponding path program 9 times [2020-12-22 04:44:41,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:41,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852722187] [2020-12-22 04:44:41,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:41,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:41,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 436 proven. 66 refuted. 0 times theorem prover too weak. 654 trivial. 0 not checked. [2020-12-22 04:44:41,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852722187] [2020-12-22 04:44:41,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689386434] [2020-12-22 04:44:41,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:41,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-12-22 04:44:41,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:41,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 04:44:41,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:41,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 445 proven. 66 refuted. 0 times theorem prover too weak. 645 trivial. 0 not checked. [2020-12-22 04:44:41,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:41,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 04:44:41,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212696473] [2020-12-22 04:44:41,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 04:44:41,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:41,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 04:44:41,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:44:41,914 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 15 states. [2020-12-22 04:44:42,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:42,054 INFO L93 Difference]: Finished difference Result 158 states and 172 transitions. [2020-12-22 04:44:42,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 04:44:42,054 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2020-12-22 04:44:42,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:42,055 INFO L225 Difference]: With dead ends: 158 [2020-12-22 04:44:42,055 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 04:44:42,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-12-22 04:44:42,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 04:44:42,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-12-22 04:44:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 04:44:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 87 transitions. [2020-12-22 04:44:42,074 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 87 transitions. Word has length 71 [2020-12-22 04:44:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:42,074 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 87 transitions. [2020-12-22 04:44:42,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 04:44:42,074 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 87 transitions. [2020-12-22 04:44:42,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 04:44:42,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:42,076 INFO L422 BasicCegarLoop]: trace histogram [48, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:42,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 04:44:42,279 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:42,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:42,280 INFO L82 PathProgramCache]: Analyzing trace with hash 1455118632, now seen corresponding path program 10 times [2020-12-22 04:44:42,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:42,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571736466] [2020-12-22 04:44:42,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:42,567 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 511 proven. 78 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2020-12-22 04:44:42,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571736466] [2020-12-22 04:44:42,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597138853] [2020-12-22 04:44:42,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:42,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:44:42,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:42,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 04:44:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:42,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1354 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2020-12-22 04:44:42,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:42,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 25 [2020-12-22 04:44:42,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111039200] [2020-12-22 04:44:42,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:44:42,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:42,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:44:42,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:44:42,974 INFO L87 Difference]: Start difference. First operand 82 states and 87 transitions. Second operand 25 states. [2020-12-22 04:44:45,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:45,102 INFO L93 Difference]: Finished difference Result 201 states and 220 transitions. [2020-12-22 04:44:45,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-12-22 04:44:45,103 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 75 [2020-12-22 04:44:45,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:45,104 INFO L225 Difference]: With dead ends: 201 [2020-12-22 04:44:45,104 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 04:44:45,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2115 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=429, Invalid=6711, Unknown=0, NotChecked=0, Total=7140 [2020-12-22 04:44:45,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 04:44:45,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 104. [2020-12-22 04:44:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 04:44:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 110 transitions. [2020-12-22 04:44:45,149 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 110 transitions. Word has length 75 [2020-12-22 04:44:45,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:45,149 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 110 transitions. [2020-12-22 04:44:45,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:44:45,150 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 110 transitions. [2020-12-22 04:44:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 04:44:45,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:45,151 INFO L422 BasicCegarLoop]: trace histogram [65, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:45,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 04:44:45,365 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:45,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:45,366 INFO L82 PathProgramCache]: Analyzing trace with hash 183931010, now seen corresponding path program 11 times [2020-12-22 04:44:45,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:45,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918061977] [2020-12-22 04:44:45,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:45,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:45,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 789 proven. 91 refuted. 0 times theorem prover too weak. 1580 trivial. 0 not checked. [2020-12-22 04:44:45,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918061977] [2020-12-22 04:44:45,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78478345] [2020-12-22 04:44:45,656 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:47,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 04:44:47,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:47,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 04:44:47,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:48,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2460 backedges. 1392 proven. 91 refuted. 0 times theorem prover too weak. 977 trivial. 0 not checked. [2020-12-22 04:44:48,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:48,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 04:44:48,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470611328] [2020-12-22 04:44:48,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 04:44:48,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:48,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 04:44:48,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:44:48,097 INFO L87 Difference]: Start difference. First operand 104 states and 110 transitions. Second operand 17 states. [2020-12-22 04:44:48,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:48,314 INFO L93 Difference]: Finished difference Result 211 states and 228 transitions. [2020-12-22 04:44:48,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 04:44:48,315 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 97 [2020-12-22 04:44:48,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:48,317 INFO L225 Difference]: With dead ends: 211 [2020-12-22 04:44:48,317 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 04:44:48,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 89 SyntacticMatches, 9 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-12-22 04:44:48,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 04:44:48,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-12-22 04:44:48,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-12-22 04:44:48,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2020-12-22 04:44:48,346 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 97 [2020-12-22 04:44:48,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:48,347 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2020-12-22 04:44:48,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 04:44:48,347 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2020-12-22 04:44:48,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-12-22 04:44:48,348 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:48,349 INFO L422 BasicCegarLoop]: trace histogram [70, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:48,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:48,553 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:48,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:48,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1472491819, now seen corresponding path program 12 times [2020-12-22 04:44:48,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:48,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678427495] [2020-12-22 04:44:48,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:48,930 INFO L134 CoverageAnalysis]: Checked inductivity of 2820 backedges. 905 proven. 105 refuted. 0 times theorem prover too weak. 1810 trivial. 0 not checked. [2020-12-22 04:44:48,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678427495] [2020-12-22 04:44:48,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487961315] [2020-12-22 04:44:48,934 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:57,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2020-12-22 04:44:57,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:57,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-22 04:44:57,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:57,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2820 backedges. 1595 proven. 105 refuted. 0 times theorem prover too weak. 1120 trivial. 0 not checked. [2020-12-22 04:44:57,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:57,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 04:44:57,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384147133] [2020-12-22 04:44:57,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 04:44:57,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:57,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 04:44:57,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:44:57,694 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand 18 states. [2020-12-22 04:44:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:57,873 INFO L93 Difference]: Finished difference Result 221 states and 238 transitions. [2020-12-22 04:44:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 04:44:57,874 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2020-12-22 04:44:57,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:57,875 INFO L225 Difference]: With dead ends: 221 [2020-12-22 04:44:57,875 INFO L226 Difference]: Without dead ends: 115 [2020-12-22 04:44:57,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-12-22 04:44:57,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-22 04:44:57,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2020-12-22 04:44:57,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-12-22 04:44:57,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2020-12-22 04:44:57,897 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 102 [2020-12-22 04:44:57,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:57,898 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2020-12-22 04:44:57,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 04:44:57,898 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2020-12-22 04:44:57,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-22 04:44:57,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:57,899 INFO L422 BasicCegarLoop]: trace histogram [75, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:58,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 04:44:58,107 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:58,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:58,108 INFO L82 PathProgramCache]: Analyzing trace with hash -2114425758, now seen corresponding path program 13 times [2020-12-22 04:44:58,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:58,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076486548] [2020-12-22 04:44:58,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:58,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:58,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 1029 proven. 120 refuted. 0 times theorem prover too weak. 2056 trivial. 0 not checked. [2020-12-22 04:44:58,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076486548] [2020-12-22 04:44:58,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908050657] [2020-12-22 04:44:58,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:58,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:58,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 04:44:58,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3205 backedges. 1029 proven. 120 refuted. 0 times theorem prover too weak. 2056 trivial. 0 not checked. [2020-12-22 04:44:58,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:58,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 04:44:58,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985600145] [2020-12-22 04:44:58,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 04:44:58,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:58,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 04:44:58,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:44:58,701 INFO L87 Difference]: Start difference. First operand 114 states and 120 transitions. Second operand 19 states. [2020-12-22 04:44:58,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:44:58,940 INFO L93 Difference]: Finished difference Result 231 states and 248 transitions. [2020-12-22 04:44:58,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 04:44:58,941 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 107 [2020-12-22 04:44:58,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:44:58,942 INFO L225 Difference]: With dead ends: 231 [2020-12-22 04:44:58,942 INFO L226 Difference]: Without dead ends: 120 [2020-12-22 04:44:58,943 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-12-22 04:44:58,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-22 04:44:58,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-12-22 04:44:58,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-12-22 04:44:58,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 125 transitions. [2020-12-22 04:44:58,965 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 125 transitions. Word has length 107 [2020-12-22 04:44:58,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:44:58,965 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 125 transitions. [2020-12-22 04:44:58,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 04:44:58,965 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 125 transitions. [2020-12-22 04:44:58,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 04:44:58,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:44:58,966 INFO L422 BasicCegarLoop]: trace histogram [80, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:44:59,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:59,180 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:44:59,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:44:59,181 INFO L82 PathProgramCache]: Analyzing trace with hash -988403467, now seen corresponding path program 14 times [2020-12-22 04:44:59,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:44:59,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474151509] [2020-12-22 04:44:59,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:44:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:44:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3615 backedges. 1161 proven. 136 refuted. 0 times theorem prover too weak. 2318 trivial. 0 not checked. [2020-12-22 04:44:59,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474151509] [2020-12-22 04:44:59,573 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151220207] [2020-12-22 04:44:59,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:44:59,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:44:59,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:44:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 04:44:59,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:44:59,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3615 backedges. 0 proven. 2935 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2020-12-22 04:44:59,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:44:59,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 8] total 25 [2020-12-22 04:44:59,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117226458] [2020-12-22 04:44:59,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:44:59,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:44:59,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:44:59,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:44:59,958 INFO L87 Difference]: Start difference. First operand 119 states and 125 transitions. Second operand 25 states. [2020-12-22 04:45:04,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:04,127 INFO L93 Difference]: Finished difference Result 284 states and 306 transitions. [2020-12-22 04:45:04,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2020-12-22 04:45:04,132 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 112 [2020-12-22 04:45:04,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:04,134 INFO L225 Difference]: With dead ends: 284 [2020-12-22 04:45:04,134 INFO L226 Difference]: Without dead ends: 168 [2020-12-22 04:45:04,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5157 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=663, Invalid=15339, Unknown=0, NotChecked=0, Total=16002 [2020-12-22 04:45:04,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-12-22 04:45:04,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 146. [2020-12-22 04:45:04,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-12-22 04:45:04,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 153 transitions. [2020-12-22 04:45:04,168 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 153 transitions. Word has length 112 [2020-12-22 04:45:04,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:04,168 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 153 transitions. [2020-12-22 04:45:04,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:45:04,168 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 153 transitions. [2020-12-22 04:45:04,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 04:45:04,170 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:04,170 INFO L422 BasicCegarLoop]: trace histogram [102, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:04,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:04,385 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:04,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:04,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1207340588, now seen corresponding path program 15 times [2020-12-22 04:45:04,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:04,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231815930] [2020-12-22 04:45:04,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:04,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5844 backedges. 1626 proven. 153 refuted. 0 times theorem prover too weak. 4065 trivial. 0 not checked. [2020-12-22 04:45:04,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231815930] [2020-12-22 04:45:04,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577689423] [2020-12-22 04:45:04,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:06,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 20 check-sat command(s) [2020-12-22 04:45:06,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:06,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 04:45:06,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 5844 backedges. 1641 proven. 153 refuted. 0 times theorem prover too weak. 4050 trivial. 0 not checked. [2020-12-22 04:45:07,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:07,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 04:45:07,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2585266] [2020-12-22 04:45:07,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 04:45:07,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:07,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 04:45:07,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:45:07,098 INFO L87 Difference]: Start difference. First operand 146 states and 153 transitions. Second operand 21 states. [2020-12-22 04:45:07,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:07,419 INFO L93 Difference]: Finished difference Result 296 states and 316 transitions. [2020-12-22 04:45:07,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 04:45:07,420 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 139 [2020-12-22 04:45:07,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:07,421 INFO L225 Difference]: With dead ends: 296 [2020-12-22 04:45:07,421 INFO L226 Difference]: Without dead ends: 153 [2020-12-22 04:45:07,422 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 11 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-12-22 04:45:07,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-22 04:45:07,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2020-12-22 04:45:07,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-22 04:45:07,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 159 transitions. [2020-12-22 04:45:07,450 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 159 transitions. Word has length 139 [2020-12-22 04:45:07,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:07,450 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 159 transitions. [2020-12-22 04:45:07,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 04:45:07,450 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 159 transitions. [2020-12-22 04:45:07,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-12-22 04:45:07,452 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:07,452 INFO L422 BasicCegarLoop]: trace histogram [108, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:07,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 04:45:07,659 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:07,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:07,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1142702600, now seen corresponding path program 16 times [2020-12-22 04:45:07,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:07,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007316533] [2020-12-22 04:45:07,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:08,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6507 backedges. 1811 proven. 171 refuted. 0 times theorem prover too weak. 4525 trivial. 0 not checked. [2020-12-22 04:45:08,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007316533] [2020-12-22 04:45:08,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071013962] [2020-12-22 04:45:08,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:08,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:45:08,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:08,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 04:45:08,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:08,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6507 backedges. 1811 proven. 171 refuted. 0 times theorem prover too weak. 4525 trivial. 0 not checked. [2020-12-22 04:45:08,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:08,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 04:45:08,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778391759] [2020-12-22 04:45:08,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 04:45:08,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:08,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 04:45:08,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:45:08,522 INFO L87 Difference]: Start difference. First operand 152 states and 159 transitions. Second operand 22 states. [2020-12-22 04:45:08,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:08,793 INFO L93 Difference]: Finished difference Result 308 states and 328 transitions. [2020-12-22 04:45:08,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 04:45:08,795 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 145 [2020-12-22 04:45:08,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:08,796 INFO L225 Difference]: With dead ends: 308 [2020-12-22 04:45:08,796 INFO L226 Difference]: Without dead ends: 159 [2020-12-22 04:45:08,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 145 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-12-22 04:45:08,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-22 04:45:08,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 158. [2020-12-22 04:45:08,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-22 04:45:08,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 165 transitions. [2020-12-22 04:45:08,820 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 165 transitions. Word has length 145 [2020-12-22 04:45:08,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:08,820 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 165 transitions. [2020-12-22 04:45:08,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 04:45:08,820 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 165 transitions. [2020-12-22 04:45:08,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 04:45:08,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:08,822 INFO L422 BasicCegarLoop]: trace histogram [114, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:09,036 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:09,037 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:09,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:09,038 INFO L82 PathProgramCache]: Analyzing trace with hash -329577836, now seen corresponding path program 17 times [2020-12-22 04:45:09,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:09,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989398696] [2020-12-22 04:45:09,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 7206 backedges. 2006 proven. 190 refuted. 0 times theorem prover too weak. 5010 trivial. 0 not checked. [2020-12-22 04:45:09,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989398696] [2020-12-22 04:45:09,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282822814] [2020-12-22 04:45:09,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:45:40,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-12-22 04:45:40,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:45:40,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-22 04:45:40,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:45:40,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7206 backedges. 3625 proven. 190 refuted. 0 times theorem prover too weak. 3391 trivial. 0 not checked. [2020-12-22 04:45:40,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:45:40,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 04:45:40,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974507982] [2020-12-22 04:45:40,681 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 04:45:40,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:45:40,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 04:45:40,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:45:40,682 INFO L87 Difference]: Start difference. First operand 158 states and 165 transitions. Second operand 23 states. [2020-12-22 04:45:41,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:45:41,014 INFO L93 Difference]: Finished difference Result 320 states and 340 transitions. [2020-12-22 04:45:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 04:45:41,015 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 151 [2020-12-22 04:45:41,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:45:41,015 INFO L225 Difference]: With dead ends: 320 [2020-12-22 04:45:41,016 INFO L226 Difference]: Without dead ends: 165 [2020-12-22 04:45:41,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 136 SyntacticMatches, 16 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-12-22 04:45:41,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-22 04:45:41,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2020-12-22 04:45:41,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-22 04:45:41,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 171 transitions. [2020-12-22 04:45:41,042 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 171 transitions. Word has length 151 [2020-12-22 04:45:41,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:45:41,042 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 171 transitions. [2020-12-22 04:45:41,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 04:45:41,042 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 171 transitions. [2020-12-22 04:45:41,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 04:45:41,044 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:45:41,044 INFO L422 BasicCegarLoop]: trace histogram [120, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:45:41,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 04:45:41,245 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:45:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:45:41,246 INFO L82 PathProgramCache]: Analyzing trace with hash 1740729288, now seen corresponding path program 18 times [2020-12-22 04:45:41,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:45:41,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835283888] [2020-12-22 04:45:41,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:45:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:45:41,764 INFO L134 CoverageAnalysis]: Checked inductivity of 7941 backedges. 2211 proven. 210 refuted. 0 times theorem prover too weak. 5520 trivial. 0 not checked. [2020-12-22 04:45:41,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835283888] [2020-12-22 04:45:41,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68027626] [2020-12-22 04:45:41,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:35,662 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2020-12-22 04:46:35,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:35,686 WARN L261 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 190 conjunts are in the unsatisfiable core [2020-12-22 04:46:35,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 7941 backedges. 3994 proven. 210 refuted. 0 times theorem prover too weak. 3737 trivial. 0 not checked. [2020-12-22 04:46:36,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:36,332 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-22 04:46:36,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000545653] [2020-12-22 04:46:36,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 04:46:36,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:36,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 04:46:36,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:46:36,333 INFO L87 Difference]: Start difference. First operand 164 states and 171 transitions. Second operand 24 states. [2020-12-22 04:46:36,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:36,700 INFO L93 Difference]: Finished difference Result 332 states and 352 transitions. [2020-12-22 04:46:36,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 04:46:36,701 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 157 [2020-12-22 04:46:36,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:36,702 INFO L225 Difference]: With dead ends: 332 [2020-12-22 04:46:36,702 INFO L226 Difference]: Without dead ends: 171 [2020-12-22 04:46:36,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 139 SyntacticMatches, 19 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-12-22 04:46:36,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-22 04:46:36,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 170. [2020-12-22 04:46:36,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-22 04:46:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 177 transitions. [2020-12-22 04:46:36,726 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 177 transitions. Word has length 157 [2020-12-22 04:46:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:36,726 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 177 transitions. [2020-12-22 04:46:36,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 04:46:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 177 transitions. [2020-12-22 04:46:36,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-12-22 04:46:36,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:36,728 INFO L422 BasicCegarLoop]: trace histogram [126, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:36,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 04:46:36,937 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:36,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:36,938 INFO L82 PathProgramCache]: Analyzing trace with hash 529015636, now seen corresponding path program 19 times [2020-12-22 04:46:36,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:36,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445470548] [2020-12-22 04:46:36,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:37,479 INFO L134 CoverageAnalysis]: Checked inductivity of 8712 backedges. 2426 proven. 231 refuted. 0 times theorem prover too weak. 6055 trivial. 0 not checked. [2020-12-22 04:46:37,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445470548] [2020-12-22 04:46:37,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266924004] [2020-12-22 04:46:37,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:37,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:37,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 04:46:37,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 8712 backedges. 2426 proven. 231 refuted. 0 times theorem prover too weak. 6055 trivial. 0 not checked. [2020-12-22 04:46:37,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:37,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 04:46:37,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550644597] [2020-12-22 04:46:37,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 04:46:37,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:37,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 04:46:37,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:46:37,809 INFO L87 Difference]: Start difference. First operand 170 states and 177 transitions. Second operand 25 states. [2020-12-22 04:46:38,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:38,205 INFO L93 Difference]: Finished difference Result 344 states and 364 transitions. [2020-12-22 04:46:38,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 04:46:38,206 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 163 [2020-12-22 04:46:38,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:38,207 INFO L225 Difference]: With dead ends: 344 [2020-12-22 04:46:38,207 INFO L226 Difference]: Without dead ends: 177 [2020-12-22 04:46:38,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-12-22 04:46:38,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-22 04:46:38,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2020-12-22 04:46:38,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-22 04:46:38,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 183 transitions. [2020-12-22 04:46:38,237 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 183 transitions. Word has length 163 [2020-12-22 04:46:38,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:38,237 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 183 transitions. [2020-12-22 04:46:38,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 04:46:38,238 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 183 transitions. [2020-12-22 04:46:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 04:46:38,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:38,239 INFO L422 BasicCegarLoop]: trace histogram [132, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:38,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:38,453 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:38,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:38,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1083397512, now seen corresponding path program 20 times [2020-12-22 04:46:38,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:38,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311780176] [2020-12-22 04:46:38,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:39,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9519 backedges. 2651 proven. 253 refuted. 0 times theorem prover too weak. 6615 trivial. 0 not checked. [2020-12-22 04:46:39,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311780176] [2020-12-22 04:46:39,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035642044] [2020-12-22 04:46:39,006 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:39,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 04:46:39,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:39,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 512 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 04:46:39,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:39,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9519 backedges. 0 proven. 8001 refuted. 0 times theorem prover too weak. 1518 trivial. 0 not checked. [2020-12-22 04:46:39,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:39,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2020-12-22 04:46:39,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338933385] [2020-12-22 04:46:39,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 04:46:39,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:39,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 04:46:39,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=909, Unknown=0, NotChecked=0, Total=992 [2020-12-22 04:46:39,543 INFO L87 Difference]: Start difference. First operand 176 states and 183 transitions. Second operand 32 states. [2020-12-22 04:46:47,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:47,841 INFO L93 Difference]: Finished difference Result 411 states and 436 transitions. [2020-12-22 04:46:47,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2020-12-22 04:46:47,842 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 169 [2020-12-22 04:46:47,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:47,844 INFO L225 Difference]: With dead ends: 411 [2020-12-22 04:46:47,844 INFO L226 Difference]: Without dead ends: 238 [2020-12-22 04:46:47,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12887 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=1035, Invalid=36021, Unknown=0, NotChecked=0, Total=37056 [2020-12-22 04:46:47,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-22 04:46:47,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 210. [2020-12-22 04:46:47,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-12-22 04:46:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 218 transitions. [2020-12-22 04:46:47,885 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 218 transitions. Word has length 169 [2020-12-22 04:46:47,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:47,885 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 218 transitions. [2020-12-22 04:46:47,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 04:46:47,886 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 218 transitions. [2020-12-22 04:46:47,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-12-22 04:46:47,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:47,888 INFO L422 BasicCegarLoop]: trace histogram [161, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:48,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 04:46:48,102 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:48,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:48,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1670819142, now seen corresponding path program 21 times [2020-12-22 04:46:48,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:48,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024388376] [2020-12-22 04:46:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:48,733 INFO L134 CoverageAnalysis]: Checked inductivity of 14119 backedges. 3463 proven. 276 refuted. 0 times theorem prover too weak. 10380 trivial. 0 not checked. [2020-12-22 04:46:48,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024388376] [2020-12-22 04:46:48,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76113454] [2020-12-22 04:46:48,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:52,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2020-12-22 04:46:52,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:52,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 04:46:52,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14119 backedges. 3481 proven. 276 refuted. 0 times theorem prover too weak. 10362 trivial. 0 not checked. [2020-12-22 04:46:52,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:52,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-22 04:46:52,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82084081] [2020-12-22 04:46:52,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 04:46:52,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:52,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 04:46:52,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:46:52,693 INFO L87 Difference]: Start difference. First operand 210 states and 218 transitions. Second operand 27 states. [2020-12-22 04:46:53,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:53,236 INFO L93 Difference]: Finished difference Result 425 states and 448 transitions. [2020-12-22 04:46:53,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 04:46:53,237 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 203 [2020-12-22 04:46:53,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:53,238 INFO L225 Difference]: With dead ends: 425 [2020-12-22 04:46:53,238 INFO L226 Difference]: Without dead ends: 218 [2020-12-22 04:46:53,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 192 SyntacticMatches, 12 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-12-22 04:46:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-22 04:46:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2020-12-22 04:46:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-22 04:46:53,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 225 transitions. [2020-12-22 04:46:53,273 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 225 transitions. Word has length 203 [2020-12-22 04:46:53,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:53,273 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 225 transitions. [2020-12-22 04:46:53,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 04:46:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 225 transitions. [2020-12-22 04:46:53,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-22 04:46:53,274 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:53,275 INFO L422 BasicCegarLoop]: trace histogram [168, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:53,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:53,479 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:53,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:53,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1461556821, now seen corresponding path program 22 times [2020-12-22 04:46:53,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:53,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438725803] [2020-12-22 04:46:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:53,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:54,146 INFO L134 CoverageAnalysis]: Checked inductivity of 15316 backedges. 3757 proven. 300 refuted. 0 times theorem prover too weak. 11259 trivial. 0 not checked. [2020-12-22 04:46:54,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438725803] [2020-12-22 04:46:54,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686417004] [2020-12-22 04:46:54,147 INFO L93 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:46:54,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 04:46:54,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:46:54,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 04:46:54,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:46:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 15316 backedges. 3757 proven. 300 refuted. 0 times theorem prover too weak. 11259 trivial. 0 not checked. [2020-12-22 04:46:54,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:46:54,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-22 04:46:54,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751547011] [2020-12-22 04:46:54,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 04:46:54,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:46:54,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 04:46:54,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:46:54,560 INFO L87 Difference]: Start difference. First operand 217 states and 225 transitions. Second operand 28 states. [2020-12-22 04:46:55,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:46:55,132 INFO L93 Difference]: Finished difference Result 439 states and 462 transitions. [2020-12-22 04:46:55,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 04:46:55,133 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 210 [2020-12-22 04:46:55,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:46:55,134 INFO L225 Difference]: With dead ends: 439 [2020-12-22 04:46:55,134 INFO L226 Difference]: Without dead ends: 225 [2020-12-22 04:46:55,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 210 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-12-22 04:46:55,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-22 04:46:55,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2020-12-22 04:46:55,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-12-22 04:46:55,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 232 transitions. [2020-12-22 04:46:55,175 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 232 transitions. Word has length 210 [2020-12-22 04:46:55,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:46:55,175 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 232 transitions. [2020-12-22 04:46:55,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 04:46:55,175 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 232 transitions. [2020-12-22 04:46:55,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-12-22 04:46:55,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:46:55,177 INFO L422 BasicCegarLoop]: trace histogram [175, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:46:55,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 04:46:55,392 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:46:55,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:46:55,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1190981222, now seen corresponding path program 23 times [2020-12-22 04:46:55,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:46:55,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128710114] [2020-12-22 04:46:55,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:46:55,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:46:56,126 INFO L134 CoverageAnalysis]: Checked inductivity of 16562 backedges. 4063 proven. 325 refuted. 0 times theorem prover too weak. 12174 trivial. 0 not checked. [2020-12-22 04:46:56,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128710114] [2020-12-22 04:46:56,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804353306] [2020-12-22 04:46:56,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 04:48:35,551 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2020-12-22 04:48:35,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 04:48:35,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-22 04:48:35,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 04:48:36,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16562 backedges. 7466 proven. 325 refuted. 0 times theorem prover too weak. 8771 trivial. 0 not checked. [2020-12-22 04:48:36,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 04:48:36,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-22 04:48:36,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893757183] [2020-12-22 04:48:36,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 04:48:36,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 04:48:36,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 04:48:36,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:48:36,477 INFO L87 Difference]: Start difference. First operand 224 states and 232 transitions. Second operand 29 states. [2020-12-22 04:48:37,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 04:48:37,086 INFO L93 Difference]: Finished difference Result 453 states and 476 transitions. [2020-12-22 04:48:37,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 04:48:37,087 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 217 [2020-12-22 04:48:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 04:48:37,088 INFO L225 Difference]: With dead ends: 453 [2020-12-22 04:48:37,088 INFO L226 Difference]: Without dead ends: 232 [2020-12-22 04:48:37,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 198 SyntacticMatches, 20 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-12-22 04:48:37,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-12-22 04:48:37,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2020-12-22 04:48:37,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-12-22 04:48:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 239 transitions. [2020-12-22 04:48:37,130 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 239 transitions. Word has length 217 [2020-12-22 04:48:37,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 04:48:37,131 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 239 transitions. [2020-12-22 04:48:37,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 04:48:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 239 transitions. [2020-12-22 04:48:37,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-12-22 04:48:37,132 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 04:48:37,132 INFO L422 BasicCegarLoop]: trace histogram [182, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 04:48:37,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 04:48:37,344 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 04:48:37,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 04:48:37,344 INFO L82 PathProgramCache]: Analyzing trace with hash 354739509, now seen corresponding path program 24 times [2020-12-22 04:48:37,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 04:48:37,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890605945] [2020-12-22 04:48:37,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 04:48:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 04:48:38,199 INFO L134 CoverageAnalysis]: Checked inductivity of 17857 backedges. 4381 proven. 351 refuted. 0 times theorem prover too weak. 13125 trivial. 0 not checked. [2020-12-22 04:48:38,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890605945] [2020-12-22 04:48:38,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84134661] [2020-12-22 04:48:38,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true