/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/mono-crafted_8.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 17:03:34,126 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 17:03:34,131 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 17:03:34,197 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 17:03:34,198 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 17:03:34,202 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 17:03:34,207 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 17:03:34,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 17:03:34,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 17:03:34,226 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 17:03:34,231 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 17:03:34,233 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 17:03:34,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 17:03:34,239 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 17:03:34,241 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 17:03:34,244 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 17:03:34,246 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 17:03:34,250 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 17:03:34,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 17:03:34,267 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 17:03:34,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 17:03:34,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 17:03:34,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 17:03:34,278 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 17:03:34,289 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 17:03:34,296 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 17:03:34,297 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 17:03:34,300 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 17:03:34,321 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 17:03:34,322 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 17:03:34,323 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 17:03:34,323 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 17:03:34,331 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 17:03:34,332 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 17:03:34,333 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 17:03:34,334 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 17:03:34,335 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 17:03:34,378 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 17:03:34,379 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 17:03:34,381 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 17:03:34,381 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 17:03:34,381 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 17:03:34,382 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 17:03:34,382 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 17:03:34,382 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 17:03:34,383 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 17:03:34,383 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 17:03:34,383 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 17:03:34,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 17:03:34,384 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 17:03:34,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 17:03:34,384 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 17:03:34,385 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 17:03:34,385 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 17:03:34,385 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 17:03:34,385 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 17:03:34,386 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 17:03:34,386 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 17:03:34,386 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 17:03:34,386 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 17:03:34,387 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 17:03:34,387 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 17:03:34,387 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 17:03:34,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 17:03:34,863 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 17:03:34,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 17:03:34,869 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 17:03:34,870 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 17:03:34,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c [2021-01-06 17:03:34,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ffde6d293/98dc09e63de544f5bac1be3cadf688f5/FLAG2cb77d5ba [2021-01-06 17:03:35,698 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 17:03:35,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c [2021-01-06 17:03:35,706 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ffde6d293/98dc09e63de544f5bac1be3cadf688f5/FLAG2cb77d5ba [2021-01-06 17:03:36,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ffde6d293/98dc09e63de544f5bac1be3cadf688f5 [2021-01-06 17:03:36,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 17:03:36,073 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 17:03:36,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 17:03:36,075 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 17:03:36,081 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 17:03:36,082 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:03:36" (1/1) ... [2021-01-06 17:03:36,084 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6334093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:36, skipping insertion in model container [2021-01-06 17:03:36,085 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 05:03:36" (1/1) ... [2021-01-06 17:03:36,095 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 17:03:36,112 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 17:03:36,274 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c[318,331] [2021-01-06 17:03:36,292 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:03:36,305 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 17:03:36,322 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/mono-crafted_8.c[318,331] [2021-01-06 17:03:36,326 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 17:03:36,345 INFO L208 MainTranslator]: Completed translation [2021-01-06 17:03:36,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:36 WrapperNode [2021-01-06 17:03:36,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 17:03:36,348 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 17:03:36,348 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 17:03:36,348 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 17:03:36,361 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:36" (1/1) ... [2021-01-06 17:03:36,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:36" (1/1) ... [2021-01-06 17:03:36,395 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 17:03:36,396 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 17:03:36,396 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 17:03:36,396 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 17:03:36,407 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:36" (1/1) ... [2021-01-06 17:03:36,408 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:36" (1/1) ... [2021-01-06 17:03:36,409 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:36" (1/1) ... [2021-01-06 17:03:36,410 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:36" (1/1) ... [2021-01-06 17:03:36,414 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:36" (1/1) ... [2021-01-06 17:03:36,419 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:36" (1/1) ... [2021-01-06 17:03:36,420 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:36" (1/1) ... [2021-01-06 17:03:36,422 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 17:03:36,423 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 17:03:36,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 17:03:36,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 17:03:36,425 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:36" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:36,547 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 17:03:36,548 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 17:03:36,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 17:03:36,548 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 17:03:36,830 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 17:03:36,830 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 17:03:36,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:03:36 BoogieIcfgContainer [2021-01-06 17:03:36,833 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 17:03:36,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 17:03:36,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 17:03:36,840 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 17:03:36,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 05:03:36" (1/3) ... [2021-01-06 17:03:36,841 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31540691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:03:36, skipping insertion in model container [2021-01-06 17:03:36,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 05:03:36" (2/3) ... [2021-01-06 17:03:36,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31540691 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 05:03:36, skipping insertion in model container [2021-01-06 17:03:36,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 05:03:36" (3/3) ... [2021-01-06 17:03:36,845 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_8.c [2021-01-06 17:03:36,855 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 17:03:36,909 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 17:03:36,981 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 17:03:37,029 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 17:03:37,029 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 17:03:37,030 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 17:03:37,030 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 17:03:37,030 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 17:03:37,030 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 17:03:37,030 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 17:03:37,031 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 17:03:37,049 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states. [2021-01-06 17:03:37,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 17:03:37,057 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:37,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 17:03:37,059 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:37,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:37,068 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-01-06 17:03:37,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:37,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376354301] [2021-01-06 17:03:37,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:37,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376354301] [2021-01-06 17:03:37,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:03:37,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 17:03:37,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86183565] [2021-01-06 17:03:37,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 17:03:37,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:37,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 17:03:37,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:03:37,295 INFO L87 Difference]: Start difference. First operand 13 states. Second operand 2 states. [2021-01-06 17:03:37,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:37,315 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-01-06 17:03:37,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 17:03:37,317 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 17:03:37,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:37,329 INFO L225 Difference]: With dead ends: 21 [2021-01-06 17:03:37,330 INFO L226 Difference]: Without dead ends: 9 [2021-01-06 17:03:37,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 17:03:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-01-06 17:03:37,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-01-06 17:03:37,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-01-06 17:03:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-01-06 17:03:37,376 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-01-06 17:03:37,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:37,377 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-01-06 17:03:37,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 17:03:37,377 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-01-06 17:03:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 17:03:37,378 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:37,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 17:03:37,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 17:03:37,379 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:37,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:37,380 INFO L82 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-01-06 17:03:37,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:37,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909840837] [2021-01-06 17:03:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:37,590 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 10 [2021-01-06 17:03:37,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:37,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909840837] [2021-01-06 17:03:37,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 17:03:37,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 17:03:37,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757994060] [2021-01-06 17:03:37,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 17:03:37,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:37,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 17:03:37,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:03:37,604 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2021-01-06 17:03:37,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:37,675 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2021-01-06 17:03:37,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 17:03:37,677 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 17:03:37,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:37,678 INFO L225 Difference]: With dead ends: 19 [2021-01-06 17:03:37,678 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 17:03:37,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 17:03:37,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 17:03:37,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-01-06 17:03:37,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 17:03:37,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-01-06 17:03:37,686 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-01-06 17:03:37,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:37,686 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-01-06 17:03:37,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 17:03:37,687 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-01-06 17:03:37,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 17:03:37,687 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:37,688 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:37,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 17:03:37,688 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:37,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:37,689 INFO L82 PathProgramCache]: Analyzing trace with hash 641725625, now seen corresponding path program 1 times [2021-01-06 17:03:37,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:37,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619080283] [2021-01-06 17:03:37,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:37,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:37,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619080283] [2021-01-06 17:03:37,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868037462] [2021-01-06 17:03:37,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:38,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:38,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 17:03:38,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:38,178 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:38,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:38,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-01-06 17:03:38,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967066860] [2021-01-06 17:03:38,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 17:03:38,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:38,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 17:03:38,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:03:38,183 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 6 states. [2021-01-06 17:03:38,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:38,280 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-01-06 17:03:38,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 17:03:38,282 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2021-01-06 17:03:38,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:38,283 INFO L225 Difference]: With dead ends: 22 [2021-01-06 17:03:38,283 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 17:03:38,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 17:03:38,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 17:03:38,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-01-06 17:03:38,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 17:03:38,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-01-06 17:03:38,289 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2021-01-06 17:03:38,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:38,290 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-01-06 17:03:38,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 17:03:38,290 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-01-06 17:03:38,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 17:03:38,291 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:38,291 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:38,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 17:03:38,505 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:38,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:38,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1950053902, now seen corresponding path program 2 times [2021-01-06 17:03:38,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:38,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321893774] [2021-01-06 17:03:38,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:38,800 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:38,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321893774] [2021-01-06 17:03:38,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494423599] [2021-01-06 17:03:38,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:38,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:38,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:38,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:03:38,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:38,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:38,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2021-01-06 17:03:38,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480656671] [2021-01-06 17:03:38,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:03:38,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:38,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:03:38,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:03:38,935 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 8 states. [2021-01-06 17:03:39,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:39,002 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-01-06 17:03:39,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 17:03:39,003 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2021-01-06 17:03:39,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:39,004 INFO L225 Difference]: With dead ends: 25 [2021-01-06 17:03:39,004 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 17:03:39,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:03:39,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 17:03:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-01-06 17:03:39,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 17:03:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 17:03:39,010 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2021-01-06 17:03:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:39,011 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 17:03:39,011 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:03:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 17:03:39,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 17:03:39,012 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:39,012 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:39,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:39,226 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:39,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:39,228 INFO L82 PathProgramCache]: Analyzing trace with hash 1268104729, now seen corresponding path program 3 times [2021-01-06 17:03:39,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:39,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460685480] [2021-01-06 17:03:39,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:39,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:39,430 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:39,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460685480] [2021-01-06 17:03:39,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937752936] [2021-01-06 17:03:39,431 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:39,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 17:03:39,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:39,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 17:03:39,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 17:03:39,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 17:03:39,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-01-06 17:03:39,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520625053] [2021-01-06 17:03:39,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 17:03:39,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:39,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 17:03:39,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-01-06 17:03:39,569 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2021-01-06 17:03:39,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:39,623 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-01-06 17:03:39,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:03:39,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2021-01-06 17:03:39,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:39,625 INFO L225 Difference]: With dead ends: 26 [2021-01-06 17:03:39,625 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 17:03:39,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:03:39,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 17:03:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-01-06 17:03:39,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 17:03:39,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-01-06 17:03:39,631 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-01-06 17:03:39,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:39,631 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-01-06 17:03:39,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 17:03:39,632 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-01-06 17:03:39,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 17:03:39,632 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:39,633 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:39,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:39,850 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:39,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:39,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1114641236, now seen corresponding path program 1 times [2021-01-06 17:03:39,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:39,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75528635] [2021-01-06 17:03:39,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:39,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:40,046 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:40,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75528635] [2021-01-06 17:03:40,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515762195] [2021-01-06 17:03:40,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:40,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:40,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 17:03:40,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:40,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:40,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 17:03:40,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765427069] [2021-01-06 17:03:40,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 17:03:40,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:40,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 17:03:40,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:03:40,223 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 7 states. [2021-01-06 17:03:40,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:40,279 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-01-06 17:03:40,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 17:03:40,280 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2021-01-06 17:03:40,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:40,281 INFO L225 Difference]: With dead ends: 32 [2021-01-06 17:03:40,281 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 17:03:40,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 17:03:40,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 17:03:40,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-01-06 17:03:40,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 17:03:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-01-06 17:03:40,287 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-01-06 17:03:40,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:40,287 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-01-06 17:03:40,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 17:03:40,287 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-01-06 17:03:40,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 17:03:40,288 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:40,288 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:40,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:40,503 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:40,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:40,505 INFO L82 PathProgramCache]: Analyzing trace with hash -191017413, now seen corresponding path program 2 times [2021-01-06 17:03:40,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:40,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164423322] [2021-01-06 17:03:40,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:40,659 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:40,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164423322] [2021-01-06 17:03:40,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62779160] [2021-01-06 17:03:40,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:40,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:40,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:40,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 17:03:40,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:40,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:40,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 17:03:40,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390262749] [2021-01-06 17:03:40,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 17:03:40,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:40,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 17:03:40,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:03:40,815 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 8 states. [2021-01-06 17:03:40,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:40,916 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2021-01-06 17:03:40,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 17:03:40,917 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2021-01-06 17:03:40,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:40,918 INFO L225 Difference]: With dead ends: 35 [2021-01-06 17:03:40,919 INFO L226 Difference]: Without dead ends: 26 [2021-01-06 17:03:40,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 17:03:40,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-01-06 17:03:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-01-06 17:03:40,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2021-01-06 17:03:40,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-01-06 17:03:40,926 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2021-01-06 17:03:40,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:40,926 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-01-06 17:03:40,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 17:03:40,927 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-01-06 17:03:40,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 17:03:40,927 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:40,928 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:41,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 17:03:41,137 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:41,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:41,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1843997196, now seen corresponding path program 3 times [2021-01-06 17:03:41,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:41,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222399298] [2021-01-06 17:03:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:41,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 17:03:41,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222399298] [2021-01-06 17:03:41,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950957843] [2021-01-06 17:03:41,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:41,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 17:03:41,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:41,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 17:03:41,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:41,654 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 2 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 17:03:41,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:41,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-01-06 17:03:41,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157548779] [2021-01-06 17:03:41,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 17:03:41,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:41,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 17:03:41,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 17:03:41,657 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 13 states. [2021-01-06 17:03:42,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:42,054 INFO L93 Difference]: Finished difference Result 46 states and 53 transitions. [2021-01-06 17:03:42,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:03:42,055 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 24 [2021-01-06 17:03:42,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:42,056 INFO L225 Difference]: With dead ends: 46 [2021-01-06 17:03:42,056 INFO L226 Difference]: Without dead ends: 37 [2021-01-06 17:03:42,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:03:42,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-01-06 17:03:42,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-01-06 17:03:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2021-01-06 17:03:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2021-01-06 17:03:42,065 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 24 [2021-01-06 17:03:42,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:42,065 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2021-01-06 17:03:42,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 17:03:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2021-01-06 17:03:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-01-06 17:03:42,067 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:42,067 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:42,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:42,281 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:42,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:42,283 INFO L82 PathProgramCache]: Analyzing trace with hash 736189177, now seen corresponding path program 4 times [2021-01-06 17:03:42,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:42,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65742830] [2021-01-06 17:03:42,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:42,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:42,522 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 38 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:03:42,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65742830] [2021-01-06 17:03:42,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985155966] [2021-01-06 17:03:42,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:42,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:42,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:42,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 17:03:42,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:42,662 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 38 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:03:42,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:42,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 17:03:42,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322530456] [2021-01-06 17:03:42,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 17:03:42,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:42,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 17:03:42,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:03:42,665 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 11 states. [2021-01-06 17:03:42,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:42,840 INFO L93 Difference]: Finished difference Result 52 states and 57 transitions. [2021-01-06 17:03:42,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 17:03:42,841 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2021-01-06 17:03:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:42,842 INFO L225 Difference]: With dead ends: 52 [2021-01-06 17:03:42,842 INFO L226 Difference]: Without dead ends: 39 [2021-01-06 17:03:42,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 17:03:42,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-01-06 17:03:42,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2021-01-06 17:03:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 17:03:42,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-01-06 17:03:42,849 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 33 [2021-01-06 17:03:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:42,850 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-01-06 17:03:42,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 17:03:42,850 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-01-06 17:03:42,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 17:03:42,851 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:42,851 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:43,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:43,065 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:43,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:43,067 INFO L82 PathProgramCache]: Analyzing trace with hash -789048014, now seen corresponding path program 5 times [2021-01-06 17:03:43,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:43,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537812465] [2021-01-06 17:03:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:43,259 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 43 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:03:43,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537812465] [2021-01-06 17:03:43,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583601116] [2021-01-06 17:03:43,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:43,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-01-06 17:03:43,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:43,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:03:43,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 43 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:03:43,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:43,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 17:03:43,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039396002] [2021-01-06 17:03:43,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 17:03:43,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:43,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 17:03:43,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:03:43,694 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand 12 states. [2021-01-06 17:03:43,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:43,917 INFO L93 Difference]: Finished difference Result 55 states and 60 transitions. [2021-01-06 17:03:43,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 17:03:43,918 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2021-01-06 17:03:43,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:43,921 INFO L225 Difference]: With dead ends: 55 [2021-01-06 17:03:43,921 INFO L226 Difference]: Without dead ends: 42 [2021-01-06 17:03:43,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 8 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 17:03:43,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-01-06 17:03:43,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-01-06 17:03:43,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2021-01-06 17:03:43,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2021-01-06 17:03:43,928 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 36 [2021-01-06 17:03:43,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:43,929 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2021-01-06 17:03:43,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 17:03:43,929 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2021-01-06 17:03:43,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-01-06 17:03:43,930 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:43,930 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:44,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 17:03:44,137 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:44,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:44,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1623786585, now seen corresponding path program 6 times [2021-01-06 17:03:44,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:44,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975482233] [2021-01-06 17:03:44,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 48 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 17:03:44,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975482233] [2021-01-06 17:03:44,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862724663] [2021-01-06 17:03:44,346 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:44,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 17:03:44,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:44,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 17:03:44,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 69 proven. 7 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 17:03:44,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:44,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2021-01-06 17:03:44,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125027628] [2021-01-06 17:03:44,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 17:03:44,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:44,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 17:03:44,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 17:03:44,859 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 18 states. [2021-01-06 17:03:45,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:45,701 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-01-06 17:03:45,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 17:03:45,703 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2021-01-06 17:03:45,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:45,703 INFO L225 Difference]: With dead ends: 65 [2021-01-06 17:03:45,704 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 17:03:45,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:03:45,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 17:03:45,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2021-01-06 17:03:45,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 17:03:45,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-01-06 17:03:45,712 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 39 [2021-01-06 17:03:45,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:45,712 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-01-06 17:03:45,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 17:03:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-01-06 17:03:45,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 17:03:45,714 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:45,714 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 11, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:45,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:45,918 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:45,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:45,920 INFO L82 PathProgramCache]: Analyzing trace with hash -763557964, now seen corresponding path program 7 times [2021-01-06 17:03:45,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:45,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929286715] [2021-01-06 17:03:45,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 93 proven. 187 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 17:03:46,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929286715] [2021-01-06 17:03:46,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775817222] [2021-01-06 17:03:46,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:46,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:46,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 17:03:46,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:46,434 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 93 proven. 187 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 17:03:46,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:46,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 17:03:46,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913517523] [2021-01-06 17:03:46,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 17:03:46,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:46,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 17:03:46,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:03:46,437 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand 15 states. [2021-01-06 17:03:46,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:46,786 INFO L93 Difference]: Finished difference Result 70 states and 75 transitions. [2021-01-06 17:03:46,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 17:03:46,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 48 [2021-01-06 17:03:46,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:46,788 INFO L225 Difference]: With dead ends: 70 [2021-01-06 17:03:46,788 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 17:03:46,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 17:03:46,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 17:03:46,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-01-06 17:03:46,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 17:03:46,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2021-01-06 17:03:46,795 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 48 [2021-01-06 17:03:46,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:46,796 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2021-01-06 17:03:46,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 17:03:46,796 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2021-01-06 17:03:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-01-06 17:03:46,797 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:46,797 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 12, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:47,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:47,005 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:47,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:47,006 INFO L82 PathProgramCache]: Analyzing trace with hash -749374373, now seen corresponding path program 8 times [2021-01-06 17:03:47,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:47,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236476619] [2021-01-06 17:03:47,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:47,311 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 101 proven. 222 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 17:03:47,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236476619] [2021-01-06 17:03:47,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271500407] [2021-01-06 17:03:47,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:47,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:03:47,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:47,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 17:03:47,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 101 proven. 222 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 17:03:47,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:47,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-01-06 17:03:47,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528949273] [2021-01-06 17:03:47,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 17:03:47,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:47,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 17:03:47,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:03:47,471 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand 16 states. [2021-01-06 17:03:47,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:47,857 INFO L93 Difference]: Finished difference Result 73 states and 78 transitions. [2021-01-06 17:03:47,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 17:03:47,857 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2021-01-06 17:03:47,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:47,858 INFO L225 Difference]: With dead ends: 73 [2021-01-06 17:03:47,858 INFO L226 Difference]: Without dead ends: 57 [2021-01-06 17:03:47,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-01-06 17:03:47,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-01-06 17:03:47,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2021-01-06 17:03:47,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2021-01-06 17:03:47,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-01-06 17:03:47,866 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 51 [2021-01-06 17:03:47,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:47,867 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-01-06 17:03:47,867 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 17:03:47,867 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-01-06 17:03:47,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-01-06 17:03:47,868 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:47,868 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 13, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:48,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 17:03:48,082 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:48,083 INFO L82 PathProgramCache]: Analyzing trace with hash 887190100, now seen corresponding path program 9 times [2021-01-06 17:03:48,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:48,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120911067] [2021-01-06 17:03:48,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:48,469 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 109 proven. 260 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 17:03:48,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120911067] [2021-01-06 17:03:48,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948665862] [2021-01-06 17:03:48,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:48,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 17:03:48,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:48,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 17:03:48,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:49,121 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 139 proven. 15 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-01-06 17:03:49,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:49,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2021-01-06 17:03:49,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416721830] [2021-01-06 17:03:49,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 17:03:49,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:49,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 17:03:49,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:03:49,125 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 23 states. [2021-01-06 17:03:50,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:50,660 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2021-01-06 17:03:50,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 17:03:50,661 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2021-01-06 17:03:50,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:50,662 INFO L225 Difference]: With dead ends: 83 [2021-01-06 17:03:50,662 INFO L226 Difference]: Without dead ends: 67 [2021-01-06 17:03:50,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=189, Invalid=1217, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 17:03:50,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-01-06 17:03:50,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2021-01-06 17:03:50,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 17:03:50,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2021-01-06 17:03:50,671 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 54 [2021-01-06 17:03:50,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:50,671 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2021-01-06 17:03:50,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 17:03:50,671 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2021-01-06 17:03:50,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-01-06 17:03:50,676 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:50,677 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:50,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 17:03:50,878 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:50,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:50,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1208760985, now seen corresponding path program 10 times [2021-01-06 17:03:50,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:50,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430258873] [2021-01-06 17:03:50,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:50,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:51,284 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 172 proven. 345 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 17:03:51,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430258873] [2021-01-06 17:03:51,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372021415] [2021-01-06 17:03:51,285 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:51,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:03:51,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:51,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 33 conjunts are in the unsatisfiable core [2021-01-06 17:03:51,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:51,504 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 172 proven. 345 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 17:03:51,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:51,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 17:03:51,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219556813] [2021-01-06 17:03:51,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 17:03:51,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:51,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 17:03:51,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:03:51,507 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand 19 states. [2021-01-06 17:03:52,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:52,047 INFO L93 Difference]: Finished difference Result 88 states and 93 transitions. [2021-01-06 17:03:52,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 17:03:52,048 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2021-01-06 17:03:52,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:52,048 INFO L225 Difference]: With dead ends: 88 [2021-01-06 17:03:52,048 INFO L226 Difference]: Without dead ends: 69 [2021-01-06 17:03:52,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-01-06 17:03:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-01-06 17:03:52,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2021-01-06 17:03:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 17:03:52,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2021-01-06 17:03:52,056 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 63 [2021-01-06 17:03:52,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:52,057 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2021-01-06 17:03:52,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 17:03:52,057 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2021-01-06 17:03:52,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-01-06 17:03:52,058 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:52,059 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 16, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:52,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 17:03:52,272 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:52,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:52,273 INFO L82 PathProgramCache]: Analyzing trace with hash 737544978, now seen corresponding path program 11 times [2021-01-06 17:03:52,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:52,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311092088] [2021-01-06 17:03:52,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:52,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:52,776 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 183 proven. 392 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 17:03:52,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311092088] [2021-01-06 17:03:52,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367177575] [2021-01-06 17:03:52,778 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:56,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-01-06 17:03:56,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:56,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 17:03:56,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:56,818 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 183 proven. 392 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 17:03:56,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:56,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 17:03:56,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054964453] [2021-01-06 17:03:56,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 17:03:56,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:56,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 17:03:56,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:03:56,823 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand 20 states. [2021-01-06 17:03:57,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:03:57,397 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2021-01-06 17:03:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 17:03:57,398 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 66 [2021-01-06 17:03:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:03:57,399 INFO L225 Difference]: With dead ends: 91 [2021-01-06 17:03:57,399 INFO L226 Difference]: Without dead ends: 72 [2021-01-06 17:03:57,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-01-06 17:03:57,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-01-06 17:03:57,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-01-06 17:03:57,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 17:03:57,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2021-01-06 17:03:57,408 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 66 [2021-01-06 17:03:57,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:03:57,408 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2021-01-06 17:03:57,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 17:03:57,408 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2021-01-06 17:03:57,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-01-06 17:03:57,410 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:03:57,410 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 17, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 17:03:57,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:03:57,614 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:03:57,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:03:57,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1305396231, now seen corresponding path program 12 times [2021-01-06 17:03:57,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:03:57,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711331816] [2021-01-06 17:03:57,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:03:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:03:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 194 proven. 442 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 17:03:58,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711331816] [2021-01-06 17:03:58,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857808976] [2021-01-06 17:03:58,035 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:03:58,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 17:03:58,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:03:58,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 34 conjunts are in the unsatisfiable core [2021-01-06 17:03:58,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:03:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 296 proven. 197 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-01-06 17:03:59,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:03:59,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-01-06 17:03:59,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895748737] [2021-01-06 17:03:59,735 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 17:03:59,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:03:59,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 17:03:59,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1159, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:03:59,737 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 37 states. [2021-01-06 17:04:01,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:01,860 INFO L93 Difference]: Finished difference Result 116 states and 129 transitions. [2021-01-06 17:04:01,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 17:04:01,861 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 69 [2021-01-06 17:04:01,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:01,864 INFO L225 Difference]: With dead ends: 116 [2021-01-06 17:04:01,864 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 17:04:01,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=614, Invalid=2808, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 17:04:01,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 17:04:01,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 79. [2021-01-06 17:04:01,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 17:04:01,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2021-01-06 17:04:01,874 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 69 [2021-01-06 17:04:01,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:01,874 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2021-01-06 17:04:01,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 17:04:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2021-01-06 17:04:01,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-01-06 17:04:01,876 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:01,876 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 19, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:02,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 17:04:02,083 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:02,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:02,084 INFO L82 PathProgramCache]: Analyzing trace with hash -542911468, now seen corresponding path program 13 times [2021-01-06 17:04:02,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:02,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931217199] [2021-01-06 17:04:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:02,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 275 proven. 551 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 17:04:02,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931217199] [2021-01-06 17:04:02,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603666959] [2021-01-06 17:04:02,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:04:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:02,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 41 conjunts are in the unsatisfiable core [2021-01-06 17:04:02,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:02,773 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 275 proven. 551 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 17:04:02,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:02,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-01-06 17:04:02,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025608330] [2021-01-06 17:04:02,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 17:04:02,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:02,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 17:04:02,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:04:02,775 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 23 states. [2021-01-06 17:04:03,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:03,638 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-01-06 17:04:03,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 17:04:03,639 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 78 [2021-01-06 17:04:03,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:03,640 INFO L225 Difference]: With dead ends: 104 [2021-01-06 17:04:03,640 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 17:04:03,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-01-06 17:04:03,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 17:04:03,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2021-01-06 17:04:03,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 17:04:03,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2021-01-06 17:04:03,647 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 78 [2021-01-06 17:04:03,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:03,648 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2021-01-06 17:04:03,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 17:04:03,648 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2021-01-06 17:04:03,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 17:04:03,649 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:03,649 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 20, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:03,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 17:04:03,864 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:03,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:03,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1361976709, now seen corresponding path program 14 times [2021-01-06 17:04:03,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:03,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394931109] [2021-01-06 17:04:03,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:03,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:04,386 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 289 proven. 610 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 17:04:04,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394931109] [2021-01-06 17:04:04,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136225201] [2021-01-06 17:04:04,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:04:04,446 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:04:04,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:04,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 17:04:04,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:04,591 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 289 proven. 610 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 17:04:04,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:04,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-01-06 17:04:04,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859341419] [2021-01-06 17:04:04,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 17:04:04,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:04,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 17:04:04,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:04:04,593 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 24 states. [2021-01-06 17:04:05,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:05,626 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2021-01-06 17:04:05,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 17:04:05,627 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 81 [2021-01-06 17:04:05,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:05,628 INFO L225 Difference]: With dead ends: 107 [2021-01-06 17:04:05,628 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 17:04:05,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-01-06 17:04:05,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 17:04:05,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-01-06 17:04:05,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 17:04:05,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2021-01-06 17:04:05,635 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2021-01-06 17:04:05,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:05,636 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2021-01-06 17:04:05,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 17:04:05,636 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2021-01-06 17:04:05,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 17:04:05,637 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:05,637 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 21, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:05,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:05,853 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:05,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:05,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1869604532, now seen corresponding path program 15 times [2021-01-06 17:04:05,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:05,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682180199] [2021-01-06 17:04:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:05,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 303 proven. 672 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 17:04:06,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682180199] [2021-01-06 17:04:06,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060942833] [2021-01-06 17:04:06,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:04:06,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 17:04:06,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:06,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 17:04:06,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 351 proven. 40 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2021-01-06 17:04:07,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:07,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 11] total 33 [2021-01-06 17:04:07,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37853215] [2021-01-06 17:04:07,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 17:04:07,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:07,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 17:04:07,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:04:07,985 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 33 states. [2021-01-06 17:04:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:11,328 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2021-01-06 17:04:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 17:04:11,329 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 84 [2021-01-06 17:04:11,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:11,330 INFO L225 Difference]: With dead ends: 118 [2021-01-06 17:04:11,330 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 17:04:11,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 71 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=291, Invalid=2789, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 17:04:11,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 17:04:11,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-01-06 17:04:11,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2021-01-06 17:04:11,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2021-01-06 17:04:11,337 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 84 [2021-01-06 17:04:11,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:11,338 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2021-01-06 17:04:11,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 17:04:11,338 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2021-01-06 17:04:11,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-01-06 17:04:11,339 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:11,339 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 23, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:11,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:11,545 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:11,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:11,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1202044359, now seen corresponding path program 16 times [2021-01-06 17:04:11,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:11,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115434371] [2021-01-06 17:04:11,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:11,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 402 proven. 805 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 17:04:12,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115434371] [2021-01-06 17:04:12,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252066023] [2021-01-06 17:04:12,240 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:04:12,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:04:12,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:12,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 49 conjunts are in the unsatisfiable core [2021-01-06 17:04:12,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 402 proven. 805 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 17:04:12,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:12,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-01-06 17:04:12,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65974645] [2021-01-06 17:04:12,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 17:04:12,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:12,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 17:04:12,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:04:12,481 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 27 states. [2021-01-06 17:04:13,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:13,819 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2021-01-06 17:04:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 17:04:13,821 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 93 [2021-01-06 17:04:13,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:13,822 INFO L225 Difference]: With dead ends: 124 [2021-01-06 17:04:13,822 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 17:04:13,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2021-01-06 17:04:13,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 17:04:13,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 98. [2021-01-06 17:04:13,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 17:04:13,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2021-01-06 17:04:13,827 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 93 [2021-01-06 17:04:13,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:13,827 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2021-01-06 17:04:13,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 17:04:13,828 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2021-01-06 17:04:13,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 17:04:13,828 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:13,829 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 24, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:14,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:04:14,043 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:14,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:14,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1556170510, now seen corresponding path program 17 times [2021-01-06 17:04:14,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:14,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374523874] [2021-01-06 17:04:14,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:14,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:14,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 419 proven. 876 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 17:04:14,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374523874] [2021-01-06 17:04:14,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389383306] [2021-01-06 17:04:14,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:04:48,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-01-06 17:04:48,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:48,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 57 conjunts are in the unsatisfiable core [2021-01-06 17:04:48,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:49,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 359 proven. 950 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 17:04:49,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:49,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28] total 29 [2021-01-06 17:04:49,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960470672] [2021-01-06 17:04:49,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 17:04:49,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:49,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 17:04:49,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:04:49,054 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 29 states. [2021-01-06 17:04:50,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:04:50,545 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2021-01-06 17:04:50,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 17:04:50,549 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2021-01-06 17:04:50,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:04:50,550 INFO L225 Difference]: With dead ends: 130 [2021-01-06 17:04:50,550 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 17:04:50,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 91 SyntacticMatches, 6 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2021-01-06 17:04:50,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 17:04:50,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-01-06 17:04:50,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2021-01-06 17:04:50,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2021-01-06 17:04:50,556 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 96 [2021-01-06 17:04:50,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:04:50,556 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2021-01-06 17:04:50,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 17:04:50,556 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2021-01-06 17:04:50,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-01-06 17:04:50,557 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:04:50,557 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 26, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 17:04:50,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 17:04:50,761 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:04:50,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:04:50,762 INFO L82 PathProgramCache]: Analyzing trace with hash -580426862, now seen corresponding path program 18 times [2021-01-06 17:04:50,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:04:50,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760940077] [2021-01-06 17:04:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:04:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:04:51,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 453 proven. 1027 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 17:04:51,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760940077] [2021-01-06 17:04:51,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357296165] [2021-01-06 17:04:51,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:04:52,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-01-06 17:04:52,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:04:52,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 43 conjunts are in the unsatisfiable core [2021-01-06 17:04:52,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:04:55,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 597 proven. 425 refuted. 0 times theorem prover too weak. 498 trivial. 0 not checked. [2021-01-06 17:04:55,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:04:55,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 51 [2021-01-06 17:04:55,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120683483] [2021-01-06 17:04:55,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 17:04:55,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:04:55,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 17:04:55,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=2329, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 17:04:55,436 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand 51 states. [2021-01-06 17:05:02,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:02,014 INFO L93 Difference]: Finished difference Result 158 states and 172 transitions. [2021-01-06 17:05:02,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-01-06 17:05:02,015 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 102 [2021-01-06 17:05:02,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:02,016 INFO L225 Difference]: With dead ends: 158 [2021-01-06 17:05:02,016 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 17:05:02,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=804, Invalid=6336, Unknown=0, NotChecked=0, Total=7140 [2021-01-06 17:05:02,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 17:05:02,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 113. [2021-01-06 17:05:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2021-01-06 17:05:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 115 transitions. [2021-01-06 17:05:02,025 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 115 transitions. Word has length 102 [2021-01-06 17:05:02,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:02,025 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 115 transitions. [2021-01-06 17:05:02,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 17:05:02,026 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 115 transitions. [2021-01-06 17:05:02,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-01-06 17:05:02,026 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:02,026 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 28, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:02,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 17:05:02,233 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:02,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:02,234 INFO L82 PathProgramCache]: Analyzing trace with hash -2079024997, now seen corresponding path program 19 times [2021-01-06 17:05:02,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:02,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211795310] [2021-01-06 17:05:02,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:03,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 573 proven. 1190 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 17:05:03,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211795310] [2021-01-06 17:05:03,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662698739] [2021-01-06 17:05:03,153 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:05:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:03,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 17:05:03,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:03,427 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 573 proven. 1190 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 17:05:03,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:03,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-01-06 17:05:03,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751459892] [2021-01-06 17:05:03,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-01-06 17:05:03,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:03,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-01-06 17:05:03,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:05:03,430 INFO L87 Difference]: Start difference. First operand 113 states and 115 transitions. Second operand 32 states. [2021-01-06 17:05:05,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:05,450 INFO L93 Difference]: Finished difference Result 145 states and 150 transitions. [2021-01-06 17:05:05,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-01-06 17:05:05,451 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 111 [2021-01-06 17:05:05,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:05,452 INFO L225 Difference]: With dead ends: 145 [2021-01-06 17:05:05,453 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 17:05:05,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2021-01-06 17:05:05,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 17:05:05,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2021-01-06 17:05:05,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2021-01-06 17:05:05,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 118 transitions. [2021-01-06 17:05:05,460 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 118 transitions. Word has length 111 [2021-01-06 17:05:05,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:05,460 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 118 transitions. [2021-01-06 17:05:05,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2021-01-06 17:05:05,460 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 118 transitions. [2021-01-06 17:05:05,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-01-06 17:05:05,461 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:05,461 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 29, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:05,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:05,671 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:05,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:05,671 INFO L82 PathProgramCache]: Analyzing trace with hash 656945940, now seen corresponding path program 20 times [2021-01-06 17:05:05,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:05,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897819961] [2021-01-06 17:05:05,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:05,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:06,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 593 proven. 1276 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 17:05:06,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897819961] [2021-01-06 17:05:06,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909055198] [2021-01-06 17:05:06,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:05:06,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:05:06,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:06,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 61 conjunts are in the unsatisfiable core [2021-01-06 17:05:06,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 593 proven. 1276 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 17:05:07,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:07,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-01-06 17:05:07,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823196343] [2021-01-06 17:05:07,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-01-06 17:05:07,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:07,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-01-06 17:05:07,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:05:07,020 INFO L87 Difference]: Start difference. First operand 116 states and 118 transitions. Second operand 33 states. [2021-01-06 17:05:09,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:09,144 INFO L93 Difference]: Finished difference Result 148 states and 153 transitions. [2021-01-06 17:05:09,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 17:05:09,145 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 114 [2021-01-06 17:05:09,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:09,146 INFO L225 Difference]: With dead ends: 148 [2021-01-06 17:05:09,146 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 17:05:09,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 114 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 17:05:09,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 17:05:09,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-01-06 17:05:09,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 17:05:09,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-01-06 17:05:09,154 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 114 [2021-01-06 17:05:09,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:09,155 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-01-06 17:05:09,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2021-01-06 17:05:09,155 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-01-06 17:05:09,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 17:05:09,156 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:09,156 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 30, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:09,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 17:05:09,361 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:09,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:09,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1922213381, now seen corresponding path program 21 times [2021-01-06 17:05:09,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:09,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935994517] [2021-01-06 17:05:09,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:09,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 613 proven. 1365 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 17:05:10,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935994517] [2021-01-06 17:05:10,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553986630] [2021-01-06 17:05:10,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:05:10,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-01-06 17:05:10,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:10,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 17:05:10,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:12,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 682 proven. 77 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-01-06 17:05:12,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:12,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 13] total 44 [2021-01-06 17:05:12,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894173844] [2021-01-06 17:05:12,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-01-06 17:05:12,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:12,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-01-06 17:05:12,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1766, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 17:05:12,090 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 44 states. [2021-01-06 17:05:18,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:18,833 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2021-01-06 17:05:18,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-01-06 17:05:18,834 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 117 [2021-01-06 17:05:18,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:18,834 INFO L225 Difference]: With dead ends: 158 [2021-01-06 17:05:18,835 INFO L226 Difference]: Without dead ends: 130 [2021-01-06 17:05:18,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=405, Invalid=5295, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 17:05:18,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-01-06 17:05:18,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 128. [2021-01-06 17:05:18,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2021-01-06 17:05:18,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2021-01-06 17:05:18,849 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 117 [2021-01-06 17:05:18,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:18,849 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2021-01-06 17:05:18,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2021-01-06 17:05:18,849 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2021-01-06 17:05:18,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 17:05:18,850 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:18,850 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 32, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:19,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:05:19,055 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:19,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:19,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1469062866, now seen corresponding path program 22 times [2021-01-06 17:05:19,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:19,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622394761] [2021-01-06 17:05:19,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:20,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 751 proven. 1552 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 17:05:20,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622394761] [2021-01-06 17:05:20,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131381543] [2021-01-06 17:05:20,229 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:05:20,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 17:05:20,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:05:20,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 67 conjunts are in the unsatisfiable core [2021-01-06 17:05:20,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:05:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 751 proven. 1552 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 17:05:20,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:05:20,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-01-06 17:05:20,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233461128] [2021-01-06 17:05:20,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-01-06 17:05:20,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:05:20,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-01-06 17:05:20,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:05:20,566 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 36 states. [2021-01-06 17:05:23,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:05:23,184 INFO L93 Difference]: Finished difference Result 163 states and 168 transitions. [2021-01-06 17:05:23,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-01-06 17:05:23,185 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 126 [2021-01-06 17:05:23,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:05:23,186 INFO L225 Difference]: With dead ends: 163 [2021-01-06 17:05:23,186 INFO L226 Difference]: Without dead ends: 132 [2021-01-06 17:05:23,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 126 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 17:05:23,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-01-06 17:05:23,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-01-06 17:05:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 17:05:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2021-01-06 17:05:23,195 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 126 [2021-01-06 17:05:23,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:05:23,195 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2021-01-06 17:05:23,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2021-01-06 17:05:23,195 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2021-01-06 17:05:23,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-01-06 17:05:23,196 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:05:23,196 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 33, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 17:05:23,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 17:05:23,407 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:05:23,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:05:23,407 INFO L82 PathProgramCache]: Analyzing trace with hash 696722233, now seen corresponding path program 23 times [2021-01-06 17:05:23,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:05:23,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103774762] [2021-01-06 17:05:23,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:05:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:05:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 774 proven. 1650 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 17:05:24,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103774762] [2021-01-06 17:05:24,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541656771] [2021-01-06 17:05:24,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:07:06,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-01-06 17:07:06,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:06,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 93 conjunts are in the unsatisfiable core [2021-01-06 17:07:06,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 774 proven. 1650 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 17:07:07,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:07,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-01-06 17:07:07,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598971559] [2021-01-06 17:07:07,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-01-06 17:07:07,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:07,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-01-06 17:07:07,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:07:07,727 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 37 states. [2021-01-06 17:07:10,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:10,598 INFO L93 Difference]: Finished difference Result 166 states and 171 transitions. [2021-01-06 17:07:10,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 17:07:10,600 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 129 [2021-01-06 17:07:10,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:10,601 INFO L225 Difference]: With dead ends: 166 [2021-01-06 17:07:10,601 INFO L226 Difference]: Without dead ends: 135 [2021-01-06 17:07:10,602 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 111 SyntacticMatches, 20 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 17:07:10,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-01-06 17:07:10,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-01-06 17:07:10,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2021-01-06 17:07:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 136 transitions. [2021-01-06 17:07:10,609 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 136 transitions. Word has length 129 [2021-01-06 17:07:10,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:10,610 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 136 transitions. [2021-01-06 17:07:10,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2021-01-06 17:07:10,610 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 136 transitions. [2021-01-06 17:07:10,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-01-06 17:07:10,611 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:10,611 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 34, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:10,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-01-06 17:07:10,818 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:10,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:10,819 INFO L82 PathProgramCache]: Analyzing trace with hash 36729202, now seen corresponding path program 24 times [2021-01-06 17:07:10,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:10,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304921343] [2021-01-06 17:07:10,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:10,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 797 proven. 1751 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 17:07:12,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304921343] [2021-01-06 17:07:12,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753667277] [2021-01-06 17:07:12,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 17:07:13,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-01-06 17:07:13,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:13,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 52 conjunts are in the unsatisfiable core [2021-01-06 17:07:13,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 2625 backedges. 950 proven. 482 refuted. 0 times theorem prover too weak. 1193 trivial. 0 not checked. [2021-01-06 17:07:17,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:17,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 22] total 57 [2021-01-06 17:07:17,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607579090] [2021-01-06 17:07:17,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-01-06 17:07:17,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:17,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-01-06 17:07:17,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=2990, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 17:07:17,940 INFO L87 Difference]: Start difference. First operand 134 states and 136 transitions. Second operand 57 states. [2021-01-06 17:07:29,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:29,724 INFO L93 Difference]: Finished difference Result 188 states and 200 transitions. [2021-01-06 17:07:29,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-01-06 17:07:29,725 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 132 [2021-01-06 17:07:29,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:29,727 INFO L225 Difference]: With dead ends: 188 [2021-01-06 17:07:29,727 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 17:07:29,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 107 SyntacticMatches, 8 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=853, Invalid=9247, Unknown=0, NotChecked=0, Total=10100 [2021-01-06 17:07:29,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 17:07:29,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 143. [2021-01-06 17:07:29,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2021-01-06 17:07:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2021-01-06 17:07:29,739 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 132 [2021-01-06 17:07:29,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:29,739 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2021-01-06 17:07:29,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2021-01-06 17:07:29,740 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2021-01-06 17:07:29,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-01-06 17:07:29,740 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:29,741 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 36, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:29,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 17:07:29,946 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:29,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:29,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1667262789, now seen corresponding path program 25 times [2021-01-06 17:07:29,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:29,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813476842] [2021-01-06 17:07:29,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:29,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 953 proven. 1962 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 17:07:31,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813476842] [2021-01-06 17:07:31,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682245746] [2021-01-06 17:07:31,445 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:31,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:31,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 75 conjunts are in the unsatisfiable core [2021-01-06 17:07:31,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 3015 backedges. 953 proven. 1962 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 17:07:31,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:31,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-01-06 17:07:31,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168619931] [2021-01-06 17:07:31,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 17:07:31,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:31,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 17:07:31,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:07:31,835 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 40 states. [2021-01-06 17:07:35,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:35,460 INFO L93 Difference]: Finished difference Result 181 states and 186 transitions. [2021-01-06 17:07:35,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 17:07:35,461 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 141 [2021-01-06 17:07:35,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:35,463 INFO L225 Difference]: With dead ends: 181 [2021-01-06 17:07:35,463 INFO L226 Difference]: Without dead ends: 147 [2021-01-06 17:07:35,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 17:07:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-01-06 17:07:35,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2021-01-06 17:07:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2021-01-06 17:07:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2021-01-06 17:07:35,471 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 141 [2021-01-06 17:07:35,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:35,472 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2021-01-06 17:07:35,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 17:07:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2021-01-06 17:07:35,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-01-06 17:07:35,473 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:35,473 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 37, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:35,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:35,680 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:35,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:35,681 INFO L82 PathProgramCache]: Analyzing trace with hash -957327500, now seen corresponding path program 26 times [2021-01-06 17:07:35,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:35,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052300982] [2021-01-06 17:07:35,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:35,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:37,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 979 proven. 2072 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 17:07:37,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052300982] [2021-01-06 17:07:37,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114288405] [2021-01-06 17:07:37,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:37,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 17:07:37,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:37,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 77 conjunts are in the unsatisfiable core [2021-01-06 17:07:37,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:37,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 979 proven. 2072 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 17:07:37,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:37,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-01-06 17:07:37,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726553178] [2021-01-06 17:07:37,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 17:07:37,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:37,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 17:07:37,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 17:07:37,712 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 41 states. [2021-01-06 17:07:41,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 17:07:41,577 INFO L93 Difference]: Finished difference Result 184 states and 189 transitions. [2021-01-06 17:07:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 17:07:41,579 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 144 [2021-01-06 17:07:41,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 17:07:41,580 INFO L225 Difference]: With dead ends: 184 [2021-01-06 17:07:41,580 INFO L226 Difference]: Without dead ends: 150 [2021-01-06 17:07:41,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 144 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 17:07:41,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-01-06 17:07:41,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-01-06 17:07:41,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2021-01-06 17:07:41,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2021-01-06 17:07:41,589 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 144 [2021-01-06 17:07:41,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 17:07:41,589 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2021-01-06 17:07:41,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 17:07:41,589 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2021-01-06 17:07:41,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-01-06 17:07:41,590 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 17:07:41,590 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 38, 9, 1, 1, 1, 1, 1, 1] [2021-01-06 17:07:41,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 17:07:41,803 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 17:07:41,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 17:07:41,803 INFO L82 PathProgramCache]: Analyzing trace with hash 305901595, now seen corresponding path program 27 times [2021-01-06 17:07:41,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 17:07:41,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530280165] [2021-01-06 17:07:41,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 17:07:41,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 17:07:43,524 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 1005 proven. 2185 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-01-06 17:07:43,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530280165] [2021-01-06 17:07:43,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027135177] [2021-01-06 17:07:43,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 17:07:44,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-01-06 17:07:44,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 17:07:44,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 29 conjunts are in the unsatisfiable core [2021-01-06 17:07:44,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 17:07:46,424 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 1092 proven. 126 refuted. 0 times theorem prover too weak. 2072 trivial. 0 not checked. [2021-01-06 17:07:46,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 17:07:46,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 15] total 54 [2021-01-06 17:07:46,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347287242] [2021-01-06 17:07:46,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 17:07:46,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 17:07:46,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 17:07:46,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 17:07:46,427 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 54 states.