/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/Mono3_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:55:05,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:55:05,860 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:55:05,900 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:55:05,900 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:55:05,902 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:55:05,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:55:05,906 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:55:05,908 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:55:05,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:55:05,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:55:05,912 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:55:05,912 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:55:05,914 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:55:05,915 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:55:05,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:55:05,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:55:05,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:55:05,942 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:55:05,948 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:55:05,953 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:55:05,960 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:55:05,962 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:55:05,965 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:55:05,971 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:55:05,977 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:55:05,981 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:55:05,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:55:05,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:55:05,986 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:55:05,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:55:05,987 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:55:05,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:55:05,992 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:55:05,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:55:05,997 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:55:06,000 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 16:55:06,050 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:55:06,051 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:55:06,055 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:55:06,055 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:55:06,055 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:55:06,055 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:55:06,056 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:55:06,056 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:55:06,057 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:55:06,058 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:55:06,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:55:06,059 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:55:06,059 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:55:06,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:55:06,060 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:55:06,060 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:55:06,060 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:55:06,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:55:06,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:55:06,061 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:55:06,061 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:55:06,061 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:55:06,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:55:06,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:55:06,062 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:55:06,062 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:55:06,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:55:06,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:55:06,531 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:55:06,533 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:55:06,534 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:55:06,535 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2021-01-06 16:55:06,627 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ed144950f/dbfa3fc45543423085f645500b7b22bc/FLAG2df52cc23 [2021-01-06 16:55:07,282 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:55:07,282 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/Mono3_1.c [2021-01-06 16:55:07,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ed144950f/dbfa3fc45543423085f645500b7b22bc/FLAG2df52cc23 [2021-01-06 16:55:07,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ed144950f/dbfa3fc45543423085f645500b7b22bc [2021-01-06 16:55:07,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:55:07,652 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:55:07,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:55:07,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:55:07,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:55:07,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:55:07" (1/1) ... [2021-01-06 16:55:07,663 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7cb491e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:07, skipping insertion in model container [2021-01-06 16:55:07,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:55:07" (1/1) ... [2021-01-06 16:55:07,672 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:55:07,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:55:07,882 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/Mono3_1.c[311,324] [2021-01-06 16:55:07,895 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:55:07,907 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:55:07,921 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/Mono3_1.c[311,324] [2021-01-06 16:55:07,924 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:55:07,941 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:55:07,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:07 WrapperNode [2021-01-06 16:55:07,942 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:55:07,944 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:55:07,944 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:55:07,944 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:55:07,953 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:07" (1/1) ... [2021-01-06 16:55:07,961 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:07" (1/1) ... [2021-01-06 16:55:07,980 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:55:07,981 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:55:07,981 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:55:07,982 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:55:07,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:07" (1/1) ... [2021-01-06 16:55:07,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:07" (1/1) ... [2021-01-06 16:55:07,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:07" (1/1) ... [2021-01-06 16:55:07,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:07" (1/1) ... [2021-01-06 16:55:07,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:07" (1/1) ... [2021-01-06 16:55:07,998 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:07" (1/1) ... [2021-01-06 16:55:08,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:07" (1/1) ... [2021-01-06 16:55:08,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:55:08,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:55:08,003 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:55:08,003 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:55:08,004 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:07" (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 16:55:08,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:55:08,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:55:08,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:55:08,100 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:55:08,312 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:55:08,313 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:55:08,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:55:08 BoogieIcfgContainer [2021-01-06 16:55:08,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:55:08,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:55:08,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:55:08,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:55:08,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:55:07" (1/3) ... [2021-01-06 16:55:08,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c565341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:55:08, skipping insertion in model container [2021-01-06 16:55:08,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:55:07" (2/3) ... [2021-01-06 16:55:08,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c565341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:55:08, skipping insertion in model container [2021-01-06 16:55:08,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:55:08" (3/3) ... [2021-01-06 16:55:08,324 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono3_1.c [2021-01-06 16:55:08,332 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:55:08,337 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:55:08,358 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:55:08,446 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:55:08,446 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:55:08,446 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:55:08,446 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:55:08,446 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:55:08,447 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:55:08,447 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:55:08,447 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:55:08,472 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states. [2021-01-06 16:55:08,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:55:08,479 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:08,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:55:08,480 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:08,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:08,488 INFO L82 PathProgramCache]: Analyzing trace with hash 889968487, now seen corresponding path program 1 times [2021-01-06 16:55:08,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:08,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408054225] [2021-01-06 16:55:08,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:08,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:08,723 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 16:55:08,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408054225] [2021-01-06 16:55:08,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:55:08,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 16:55:08,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215734224] [2021-01-06 16:55:08,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-01-06 16:55:08,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:08,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-01-06 16:55:08,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-01-06 16:55:08,761 INFO L87 Difference]: Start difference. First operand 12 states. Second operand 2 states. [2021-01-06 16:55:08,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:08,781 INFO L93 Difference]: Finished difference Result 19 states and 22 transitions. [2021-01-06 16:55:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-01-06 16:55:08,783 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2021-01-06 16:55:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:08,799 INFO L225 Difference]: With dead ends: 19 [2021-01-06 16:55:08,800 INFO L226 Difference]: Without dead ends: 9 [2021-01-06 16:55:08,804 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 16:55:08,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-01-06 16:55:08,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-01-06 16:55:08,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-01-06 16:55:08,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 10 transitions. [2021-01-06 16:55:08,854 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 10 transitions. Word has length 6 [2021-01-06 16:55:08,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:08,855 INFO L481 AbstractCegarLoop]: Abstraction has 9 states and 10 transitions. [2021-01-06 16:55:08,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2021-01-06 16:55:08,855 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 10 transitions. [2021-01-06 16:55:08,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:55:08,856 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:08,856 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:55:08,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:55:08,857 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:08,861 INFO L82 PathProgramCache]: Analyzing trace with hash 889640786, now seen corresponding path program 1 times [2021-01-06 16:55:08,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:08,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266955990] [2021-01-06 16:55:08,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:08,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:08,947 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 16:55:08,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266955990] [2021-01-06 16:55:08,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:55:08,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 16:55:08,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840124555] [2021-01-06 16:55:08,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-01-06 16:55:08,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:08,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-01-06 16:55:08,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:55:08,951 INFO L87 Difference]: Start difference. First operand 9 states and 10 transitions. Second operand 3 states. [2021-01-06 16:55:08,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:08,976 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2021-01-06 16:55:08,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-01-06 16:55:08,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2021-01-06 16:55:08,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:08,978 INFO L225 Difference]: With dead ends: 19 [2021-01-06 16:55:08,978 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:55:08,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-01-06 16:55:08,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:55:08,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-01-06 16:55:08,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-01-06 16:55:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2021-01-06 16:55:08,984 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 6 [2021-01-06 16:55:08,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:08,984 INFO L481 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2021-01-06 16:55:08,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-01-06 16:55:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2021-01-06 16:55:08,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:55:08,985 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:08,985 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:08,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 16:55:08,986 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:08,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash 584467323, now seen corresponding path program 1 times [2021-01-06 16:55:08,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:08,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677567933] [2021-01-06 16:55:08,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:09,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:09,129 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 16:55:09,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677567933] [2021-01-06 16:55:09,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167612394] [2021-01-06 16:55:09,130 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 16:55:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:09,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 16:55:09,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:09,342 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 16:55:09,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:09,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-01-06 16:55:09,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020204666] [2021-01-06 16:55:09,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:55:09,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:09,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:55:09,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:55:09,345 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand 7 states. [2021-01-06 16:55:09,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:09,415 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-01-06 16:55:09,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:55:09,416 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 9 [2021-01-06 16:55:09,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:09,416 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:55:09,417 INFO L226 Difference]: Without dead ends: 15 [2021-01-06 16:55:09,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:55:09,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-01-06 16:55:09,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 14. [2021-01-06 16:55:09,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:55:09,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-01-06 16:55:09,422 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2021-01-06 16:55:09,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:09,422 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-01-06 16:55:09,422 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:55:09,422 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-01-06 16:55:09,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 16:55:09,423 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:09,423 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:09,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-01-06 16:55:09,638 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:09,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:09,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1607596722, now seen corresponding path program 2 times [2021-01-06 16:55:09,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:09,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591920329] [2021-01-06 16:55:09,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:09,727 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 16:55:09,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591920329] [2021-01-06 16:55:09,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181157578] [2021-01-06 16:55:09,728 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 16:55:09,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:09,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:09,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:55:09,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:09,871 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 16:55:09,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:09,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 10 [2021-01-06 16:55:09,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152666304] [2021-01-06 16:55:09,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 16:55:09,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:09,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 16:55:09,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:55:09,875 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 10 states. [2021-01-06 16:55:09,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:09,946 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2021-01-06 16:55:09,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:55:09,947 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2021-01-06 16:55:09,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:09,948 INFO L225 Difference]: With dead ends: 25 [2021-01-06 16:55:09,949 INFO L226 Difference]: Without dead ends: 18 [2021-01-06 16:55:09,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-01-06 16:55:09,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-01-06 16:55:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-01-06 16:55:09,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:55:09,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-01-06 16:55:09,956 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 12 [2021-01-06 16:55:09,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:09,957 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-01-06 16:55:09,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 16:55:09,957 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-01-06 16:55:09,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:55:09,958 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:09,959 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:10,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:10,173 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:10,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:10,175 INFO L82 PathProgramCache]: Analyzing trace with hash 272622619, now seen corresponding path program 3 times [2021-01-06 16:55:10,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:10,176 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94638902] [2021-01-06 16:55:10,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:10,284 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 16:55:10,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94638902] [2021-01-06 16:55:10,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941776380] [2021-01-06 16:55:10,286 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 16:55:10,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 16:55:10,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:10,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-01-06 16:55:10,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:10,470 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 16:55:10,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:55:10,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-01-06 16:55:10,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257903536] [2021-01-06 16:55:10,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 16:55:10,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:10,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 16:55:10,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 16:55:10,473 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 4 states. [2021-01-06 16:55:10,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:10,536 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-01-06 16:55:10,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-01-06 16:55:10,536 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2021-01-06 16:55:10,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:10,540 INFO L225 Difference]: With dead ends: 26 [2021-01-06 16:55:10,540 INFO L226 Difference]: Without dead ends: 22 [2021-01-06 16:55:10,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:55:10,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-01-06 16:55:10,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 19. [2021-01-06 16:55:10,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2021-01-06 16:55:10,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-01-06 16:55:10,554 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2021-01-06 16:55:10,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:10,555 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-01-06 16:55:10,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 16:55:10,556 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-01-06 16:55:10,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 16:55:10,557 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:10,557 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:10,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:10,773 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:10,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:10,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1513539408, now seen corresponding path program 1 times [2021-01-06 16:55:10,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:10,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286092107] [2021-01-06 16:55:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:10,891 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 16:55:10,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286092107] [2021-01-06 16:55:10,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923800100] [2021-01-06 16:55:10,892 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 16:55:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:10,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:55:10,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:11,031 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 16:55:11,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:11,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 16:55:11,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501731975] [2021-01-06 16:55:11,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-01-06 16:55:11,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:11,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-01-06 16:55:11,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:55:11,036 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 7 states. [2021-01-06 16:55:11,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:11,115 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2021-01-06 16:55:11,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:55:11,122 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2021-01-06 16:55:11,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:11,124 INFO L225 Difference]: With dead ends: 32 [2021-01-06 16:55:11,124 INFO L226 Difference]: Without dead ends: 23 [2021-01-06 16:55:11,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:55:11,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-01-06 16:55:11,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2021-01-06 16:55:11,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2021-01-06 16:55:11,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-01-06 16:55:11,136 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2021-01-06 16:55:11,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:11,136 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-01-06 16:55:11,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2021-01-06 16:55:11,136 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-01-06 16:55:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 16:55:11,138 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:11,138 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:11,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:11,354 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:11,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:11,355 INFO L82 PathProgramCache]: Analyzing trace with hash -2092941831, now seen corresponding path program 2 times [2021-01-06 16:55:11,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:11,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628970148] [2021-01-06 16:55:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:11,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:11,466 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 16:55:11,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628970148] [2021-01-06 16:55:11,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175578020] [2021-01-06 16:55:11,468 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 16:55:11,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:11,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:11,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 16:55:11,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:11,583 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:11,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:11,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-01-06 16:55:11,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634546343] [2021-01-06 16:55:11,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:55:11,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:11,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:55:11,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:55:11,585 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 9 states. [2021-01-06 16:55:11,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:11,697 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2021-01-06 16:55:11,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 16:55:11,698 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2021-01-06 16:55:11,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:11,699 INFO L225 Difference]: With dead ends: 38 [2021-01-06 16:55:11,699 INFO L226 Difference]: Without dead ends: 29 [2021-01-06 16:55:11,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:55:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-01-06 16:55:11,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-01-06 16:55:11,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2021-01-06 16:55:11,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-01-06 16:55:11,705 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2021-01-06 16:55:11,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:11,705 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-01-06 16:55:11,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:55:11,706 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-01-06 16:55:11,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 16:55:11,706 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:11,707 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:11,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 16:55:11,921 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:11,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:11,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1860309351, now seen corresponding path program 3 times [2021-01-06 16:55:11,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:11,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863591800] [2021-01-06 16:55:11,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:12,100 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:12,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863591800] [2021-01-06 16:55:12,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056898847] [2021-01-06 16:55:12,101 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 16:55:12,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:55:12,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:12,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2021-01-06 16:55:12,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:12,234 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 2 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:55:12,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:12,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2021-01-06 16:55:12,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169411662] [2021-01-06 16:55:12,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 16:55:12,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:12,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 16:55:12,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:55:12,237 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 12 states. [2021-01-06 16:55:12,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:12,529 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-01-06 16:55:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:55:12,530 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2021-01-06 16:55:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:12,531 INFO L225 Difference]: With dead ends: 52 [2021-01-06 16:55:12,531 INFO L226 Difference]: Without dead ends: 43 [2021-01-06 16:55:12,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-01-06 16:55:12,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-01-06 16:55:12,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2021-01-06 16:55:12,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-01-06 16:55:12,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2021-01-06 16:55:12,543 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 27 [2021-01-06 16:55:12,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:12,543 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2021-01-06 16:55:12,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 16:55:12,545 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2021-01-06 16:55:12,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-01-06 16:55:12,546 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:12,546 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:12,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:12,764 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:12,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:12,765 INFO L82 PathProgramCache]: Analyzing trace with hash 801949554, now seen corresponding path program 4 times [2021-01-06 16:55:12,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:12,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143291179] [2021-01-06 16:55:12,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:12,938 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 16:55:12,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143291179] [2021-01-06 16:55:12,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415408332] [2021-01-06 16:55:12,939 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 16:55:12,988 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:55:12,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:12,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 16:55:12,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:13,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:13,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 14 [2021-01-06 16:55:13,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981765592] [2021-01-06 16:55:13,131 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:55:13,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:13,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:55:13,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:55:13,132 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 14 states. [2021-01-06 16:55:13,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:13,394 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2021-01-06 16:55:13,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:55:13,395 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2021-01-06 16:55:13,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:13,397 INFO L225 Difference]: With dead ends: 59 [2021-01-06 16:55:13,397 INFO L226 Difference]: Without dead ends: 47 [2021-01-06 16:55:13,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-01-06 16:55:13,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-01-06 16:55:13,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2021-01-06 16:55:13,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 16:55:13,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-01-06 16:55:13,405 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 36 [2021-01-06 16:55:13,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:13,405 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-01-06 16:55:13,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:55:13,406 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-01-06 16:55:13,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-01-06 16:55:13,408 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:13,408 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:13,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:13,624 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:13,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:13,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1251078533, now seen corresponding path program 5 times [2021-01-06 16:55:13,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:13,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767338060] [2021-01-06 16:55:13,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:13,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:13,903 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 58 proven. 187 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:55:13,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767338060] [2021-01-06 16:55:13,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340495400] [2021-01-06 16:55:13,904 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 16:55:14,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-01-06 16:55:14,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:14,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 16:55:14,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:14,492 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 58 proven. 187 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:55:14,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:14,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 16:55:14,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255634767] [2021-01-06 16:55:14,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 16:55:14,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:14,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 16:55:14,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:55:14,495 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 15 states. [2021-01-06 16:55:14,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:14,787 INFO L93 Difference]: Finished difference Result 62 states and 67 transitions. [2021-01-06 16:55:14,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:55:14,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 45 [2021-01-06 16:55:14,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:14,789 INFO L225 Difference]: With dead ends: 62 [2021-01-06 16:55:14,789 INFO L226 Difference]: Without dead ends: 50 [2021-01-06 16:55:14,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 9 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-01-06 16:55:14,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-01-06 16:55:14,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-01-06 16:55:14,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2021-01-06 16:55:14,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2021-01-06 16:55:14,796 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 45 [2021-01-06 16:55:14,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:14,796 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2021-01-06 16:55:14,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 16:55:14,797 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2021-01-06 16:55:14,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-01-06 16:55:14,798 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:14,798 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 2, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:15,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-01-06 16:55:15,008 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:15,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:15,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2111261134, now seen corresponding path program 6 times [2021-01-06 16:55:15,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:15,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373313382] [2021-01-06 16:55:15,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:15,291 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 63 proven. 222 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-01-06 16:55:15,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373313382] [2021-01-06 16:55:15,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471337155] [2021-01-06 16:55:15,292 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 16:55:15,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 16:55:15,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:15,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:55:15,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:15,815 INFO L134 CoverageAnalysis]: Checked inductivity of 287 backedges. 93 proven. 7 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-01-06 16:55:15,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:15,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7] total 20 [2021-01-06 16:55:15,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106162630] [2021-01-06 16:55:15,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:55:15,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:15,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:55:15,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:55:15,818 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 20 states. [2021-01-06 16:55:16,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:16,349 INFO L93 Difference]: Finished difference Result 73 states and 82 transitions. [2021-01-06 16:55:16,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:55:16,350 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2021-01-06 16:55:16,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:16,351 INFO L225 Difference]: With dead ends: 73 [2021-01-06 16:55:16,351 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 16:55:16,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:55:16,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 16:55:16,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-01-06 16:55:16,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 16:55:16,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2021-01-06 16:55:16,359 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 48 [2021-01-06 16:55:16,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:16,359 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2021-01-06 16:55:16,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:55:16,360 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2021-01-06 16:55:16,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-01-06 16:55:16,361 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:16,361 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 14, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:16,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:16,567 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:16,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:16,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1729495673, now seen corresponding path program 7 times [2021-01-06 16:55:16,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:16,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280319504] [2021-01-06 16:55:16,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:16,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:16,947 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 117 proven. 301 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 16:55:16,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280319504] [2021-01-06 16:55:16,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830269015] [2021-01-06 16:55:16,948 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 16:55:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:17,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 32 conjunts are in the unsatisfiable core [2021-01-06 16:55:17,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 117 proven. 301 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 16:55:17,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:17,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 16:55:17,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505793414] [2021-01-06 16:55:17,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 16:55:17,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:17,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 16:55:17,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:55:17,117 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 18 states. [2021-01-06 16:55:17,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:17,593 INFO L93 Difference]: Finished difference Result 79 states and 84 transitions. [2021-01-06 16:55:17,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 16:55:17,594 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 57 [2021-01-06 16:55:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:17,596 INFO L225 Difference]: With dead ends: 79 [2021-01-06 16:55:17,596 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 16:55:17,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-01-06 16:55:17,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 16:55:17,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-01-06 16:55:17,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 16:55:17,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-01-06 16:55:17,606 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 57 [2021-01-06 16:55:17,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:17,607 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-01-06 16:55:17,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 16:55:17,607 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-01-06 16:55:17,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-01-06 16:55:17,608 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:17,608 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 15, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:17,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:17,822 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:17,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:17,823 INFO L82 PathProgramCache]: Analyzing trace with hash -440938576, now seen corresponding path program 8 times [2021-01-06 16:55:17,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:17,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478940930] [2021-01-06 16:55:17,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 125 proven. 345 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 16:55:18,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478940930] [2021-01-06 16:55:18,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164071808] [2021-01-06 16:55:18,201 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 16:55:18,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:18,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:18,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 39 conjunts are in the unsatisfiable core [2021-01-06 16:55:18,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:18,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:18,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 22 [2021-01-06 16:55:18,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060100334] [2021-01-06 16:55:18,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 16:55:18,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:18,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 16:55:18,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:55:18,452 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand 22 states. [2021-01-06 16:55:19,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:19,076 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2021-01-06 16:55:19,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 16:55:19,077 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2021-01-06 16:55:19,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:19,079 INFO L225 Difference]: With dead ends: 91 [2021-01-06 16:55:19,079 INFO L226 Difference]: Without dead ends: 75 [2021-01-06 16:55:19,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-01-06 16:55:19,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-01-06 16:55:19,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 74. [2021-01-06 16:55:19,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2021-01-06 16:55:19,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2021-01-06 16:55:19,088 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 60 [2021-01-06 16:55:19,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:19,089 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2021-01-06 16:55:19,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 16:55:19,089 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2021-01-06 16:55:19,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-01-06 16:55:19,090 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:19,090 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 19, 3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:19,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-01-06 16:55:19,304 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:19,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:19,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1562149264, now seen corresponding path program 9 times [2021-01-06 16:55:19,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:19,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189699306] [2021-01-06 16:55:19,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 157 proven. 551 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-01-06 16:55:19,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189699306] [2021-01-06 16:55:19,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493890971] [2021-01-06 16:55:19,749 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 16:55:19,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 16:55:19,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:19,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 16:55:19,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:20,134 INFO L134 CoverageAnalysis]: Checked inductivity of 715 backedges. 205 proven. 15 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2021-01-06 16:55:20,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:20,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7] total 27 [2021-01-06 16:55:20,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774616814] [2021-01-06 16:55:20,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-01-06 16:55:20,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:20,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-01-06 16:55:20,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=546, Unknown=0, NotChecked=0, Total=702 [2021-01-06 16:55:20,140 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand 27 states. [2021-01-06 16:55:21,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:21,806 INFO L93 Difference]: Finished difference Result 110 states and 121 transitions. [2021-01-06 16:55:21,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:55:21,807 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 72 [2021-01-06 16:55:21,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:21,809 INFO L225 Difference]: With dead ends: 110 [2021-01-06 16:55:21,810 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 16:55:21,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=398, Invalid=934, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 16:55:21,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 16:55:21,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2021-01-06 16:55:21,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 16:55:21,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2021-01-06 16:55:21,822 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 72 [2021-01-06 16:55:21,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:21,822 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2021-01-06 16:55:21,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2021-01-06 16:55:21,823 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2021-01-06 16:55:21,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-01-06 16:55:21,824 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:21,824 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 21, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:22,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 16:55:22,028 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:22,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:22,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1672836741, now seen corresponding path program 10 times [2021-01-06 16:55:22,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:22,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806193974] [2021-01-06 16:55:22,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 238 proven. 672 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:55:22,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806193974] [2021-01-06 16:55:22,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814022938] [2021-01-06 16:55:22,603 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 16:55:22,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:55:22,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:22,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 46 conjunts are in the unsatisfiable core [2021-01-06 16:55:22,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:22,871 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 238 proven. 672 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:55:22,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:22,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-01-06 16:55:22,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490095302] [2021-01-06 16:55:22,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 16:55:22,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:22,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 16:55:22,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:55:22,874 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand 25 states. [2021-01-06 16:55:23,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:23,793 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2021-01-06 16:55:23,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 16:55:23,793 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 81 [2021-01-06 16:55:23,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:23,794 INFO L225 Difference]: With dead ends: 104 [2021-01-06 16:55:23,794 INFO L226 Difference]: Without dead ends: 86 [2021-01-06 16:55:23,795 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-01-06 16:55:23,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-01-06 16:55:23,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-01-06 16:55:23,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 16:55:23,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2021-01-06 16:55:23,804 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 81 [2021-01-06 16:55:23,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:23,805 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2021-01-06 16:55:23,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 16:55:23,805 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2021-01-06 16:55:23,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-01-06 16:55:23,806 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:23,806 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 22, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:24,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 16:55:24,022 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:24,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:24,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1678384718, now seen corresponding path program 11 times [2021-01-06 16:55:24,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:24,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139073856] [2021-01-06 16:55:24,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 249 proven. 737 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:55:24,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139073856] [2021-01-06 16:55:24,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618898234] [2021-01-06 16:55:24,569 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 16:55:27,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2021-01-06 16:55:27,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:27,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 58 conjunts are in the unsatisfiable core [2021-01-06 16:55:27,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1001 backedges. 249 proven. 737 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:55:28,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:28,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-01-06 16:55:28,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443508626] [2021-01-06 16:55:28,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 16:55:28,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:28,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 16:55:28,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:55:28,130 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand 26 states. [2021-01-06 16:55:29,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:29,086 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2021-01-06 16:55:29,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 16:55:29,086 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 84 [2021-01-06 16:55:29,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:29,087 INFO L225 Difference]: With dead ends: 107 [2021-01-06 16:55:29,087 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 16:55:29,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 73 SyntacticMatches, 13 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2021-01-06 16:55:29,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 16:55:29,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2021-01-06 16:55:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2021-01-06 16:55:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2021-01-06 16:55:29,101 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 84 [2021-01-06 16:55:29,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:29,102 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2021-01-06 16:55:29,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 16:55:29,102 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2021-01-06 16:55:29,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-01-06 16:55:29,103 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:29,103 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 23, 4, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:29,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:29,311 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:29,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:29,313 INFO L82 PathProgramCache]: Analyzing trace with hash 545557019, now seen corresponding path program 12 times [2021-01-06 16:55:29,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:29,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915048906] [2021-01-06 16:55:29,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:29,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 260 proven. 805 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-01-06 16:55:29,922 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915048906] [2021-01-06 16:55:29,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740180833] [2021-01-06 16:55:29,923 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 16:55:30,215 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-01-06 16:55:30,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:30,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 36 conjunts are in the unsatisfiable core [2021-01-06 16:55:30,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1080 backedges. 392 proven. 243 refuted. 0 times theorem prover too weak. 445 trivial. 0 not checked. [2021-01-06 16:55:32,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:32,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 17] total 41 [2021-01-06 16:55:32,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84725817] [2021-01-06 16:55:32,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-01-06 16:55:32,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:32,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-01-06 16:55:32,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=1297, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 16:55:32,025 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand 41 states. [2021-01-06 16:55:33,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:33,826 INFO L93 Difference]: Finished difference Result 130 states and 143 transitions. [2021-01-06 16:55:33,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:55:33,827 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 87 [2021-01-06 16:55:33,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:33,828 INFO L225 Difference]: With dead ends: 130 [2021-01-06 16:55:33,828 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 16:55:33,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 67 SyntacticMatches, 8 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=405, Invalid=1401, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:55:33,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 16:55:33,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 98. [2021-01-06 16:55:33,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2021-01-06 16:55:33,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2021-01-06 16:55:33,838 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 87 [2021-01-06 16:55:33,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:33,839 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2021-01-06 16:55:33,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2021-01-06 16:55:33,839 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2021-01-06 16:55:33,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-01-06 16:55:33,840 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:33,841 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 25, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:34,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 16:55:34,050 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:34,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:34,051 INFO L82 PathProgramCache]: Analyzing trace with hash -908782416, now seen corresponding path program 13 times [2021-01-06 16:55:34,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:34,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732636584] [2021-01-06 16:55:34,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:34,725 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 16:55:34,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732636584] [2021-01-06 16:55:34,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31806811] [2021-01-06 16:55:34,726 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 16:55:34,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:34,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 54 conjunts are in the unsatisfiable core [2021-01-06 16:55:34,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:34,984 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 16:55:34,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:34,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-01-06 16:55:34,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555302329] [2021-01-06 16:55:34,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-01-06 16:55:34,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:34,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-01-06 16:55:34,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:55:34,987 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand 29 states. [2021-01-06 16:55:36,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:36,235 INFO L93 Difference]: Finished difference Result 124 states and 129 transitions. [2021-01-06 16:55:36,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 16:55:36,236 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 96 [2021-01-06 16:55:36,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:36,237 INFO L225 Difference]: With dead ends: 124 [2021-01-06 16:55:36,237 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 16:55:36,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 95 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2021-01-06 16:55:36,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 16:55:36,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-01-06 16:55:36,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2021-01-06 16:55:36,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2021-01-06 16:55:36,244 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 96 [2021-01-06 16:55:36,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:36,244 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2021-01-06 16:55:36,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2021-01-06 16:55:36,244 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2021-01-06 16:55:36,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-01-06 16:55:36,246 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:36,246 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 26, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:36,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 16:55:36,460 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:36,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:36,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1184536679, now seen corresponding path program 14 times [2021-01-06 16:55:36,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:36,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235345160] [2021-01-06 16:55:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:36,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 373 proven. 1027 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 16:55:37,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235345160] [2021-01-06 16:55:37,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820552769] [2021-01-06 16:55:37,138 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 16:55:37,198 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:55:37,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:37,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 65 conjunts are in the unsatisfiable core [2021-01-06 16:55:37,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:37,571 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 0 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:55:37,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:37,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 34] total 35 [2021-01-06 16:55:37,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223985264] [2021-01-06 16:55:37,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-01-06 16:55:37,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:37,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-01-06 16:55:37,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:55:37,574 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand 35 states. [2021-01-06 16:55:39,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:39,195 INFO L93 Difference]: Finished difference Result 142 states and 152 transitions. [2021-01-06 16:55:39,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 16:55:39,195 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 99 [2021-01-06 16:55:39,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:39,196 INFO L225 Difference]: With dead ends: 142 [2021-01-06 16:55:39,197 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 16:55:39,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 16:55:39,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 16:55:39,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-01-06 16:55:39,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2021-01-06 16:55:39,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2021-01-06 16:55:39,205 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 99 [2021-01-06 16:55:39,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:39,206 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2021-01-06 16:55:39,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2021-01-06 16:55:39,206 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2021-01-06 16:55:39,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-01-06 16:55:39,208 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:39,208 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 32, 5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:39,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:39,423 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:39,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:39,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1983760761, now seen corresponding path program 15 times [2021-01-06 16:55:39,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:39,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792459291] [2021-01-06 16:55:39,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:39,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 457 proven. 1552 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 16:55:40,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792459291] [2021-01-06 16:55:40,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938556844] [2021-01-06 16:55:40,351 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 16:55:40,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-01-06 16:55:40,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:40,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 16:55:40,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:41,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2035 backedges. 538 proven. 40 refuted. 0 times theorem prover too weak. 1457 trivial. 0 not checked. [2021-01-06 16:55:41,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:41,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 10] total 43 [2021-01-06 16:55:41,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060719332] [2021-01-06 16:55:41,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:55:41,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:41,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:55:41,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1596, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:55:41,538 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 43 states. [2021-01-06 16:55:45,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:45,370 INFO L93 Difference]: Finished difference Result 155 states and 164 transitions. [2021-01-06 16:55:45,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-01-06 16:55:45,370 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 117 [2021-01-06 16:55:45,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:45,371 INFO L225 Difference]: With dead ends: 155 [2021-01-06 16:55:45,371 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 16:55:45,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 112 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=378, Invalid=2274, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 16:55:45,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 16:55:45,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 128. [2021-01-06 16:55:45,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2021-01-06 16:55:45,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 130 transitions. [2021-01-06 16:55:45,380 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 130 transitions. Word has length 117 [2021-01-06 16:55:45,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:45,380 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 130 transitions. [2021-01-06 16:55:45,381 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:55:45,381 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 130 transitions. [2021-01-06 16:55:45,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-01-06 16:55:45,382 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:45,382 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 34, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:45,597 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:45,598 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:45,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:45,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1083836562, now seen corresponding path program 16 times [2021-01-06 16:55:45,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:45,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863959369] [2021-01-06 16:55:45,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:46,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 589 proven. 1751 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:55:46,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863959369] [2021-01-06 16:55:46,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924010053] [2021-01-06 16:55:46,657 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 16:55:46,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:55:46,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:55:46,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 72 conjunts are in the unsatisfiable core [2021-01-06 16:55:46,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:55:47,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 589 proven. 1751 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:55:47,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:55:47,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-01-06 16:55:47,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339176067] [2021-01-06 16:55:47,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-01-06 16:55:47,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:55:47,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-01-06 16:55:47,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:55:47,014 INFO L87 Difference]: Start difference. First operand 128 states and 130 transitions. Second operand 38 states. [2021-01-06 16:55:49,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:55:49,290 INFO L93 Difference]: Finished difference Result 157 states and 162 transitions. [2021-01-06 16:55:49,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-01-06 16:55:49,296 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 126 [2021-01-06 16:55:49,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:55:49,298 INFO L225 Difference]: With dead ends: 157 [2021-01-06 16:55:49,298 INFO L226 Difference]: Without dead ends: 132 [2021-01-06 16:55:49,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 16:55:49,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-01-06 16:55:49,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-01-06 16:55:49,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2021-01-06 16:55:49,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2021-01-06 16:55:49,308 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 126 [2021-01-06 16:55:49,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:55:49,308 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2021-01-06 16:55:49,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2021-01-06 16:55:49,308 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2021-01-06 16:55:49,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-01-06 16:55:49,309 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:55:49,310 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 35, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:55:49,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:55:49,523 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:55:49,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:55:49,524 INFO L82 PathProgramCache]: Analyzing trace with hash 741154235, now seen corresponding path program 17 times [2021-01-06 16:55:49,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:55:49,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931174168] [2021-01-06 16:55:49,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:55:49,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:55:50,645 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 606 proven. 1855 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:55:50,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931174168] [2021-01-06 16:55:50,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977762325] [2021-01-06 16:55:50,646 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 16:56:21,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-01-06 16:56:21,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:21,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 78 conjunts are in the unsatisfiable core [2021-01-06 16:56:21,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:22,019 INFO L134 CoverageAnalysis]: Checked inductivity of 2501 backedges. 513 proven. 1962 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-01-06 16:56:22,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:22,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 40 [2021-01-06 16:56:22,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813142832] [2021-01-06 16:56:22,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-01-06 16:56:22,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:22,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-01-06 16:56:22,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:56:22,023 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 40 states. [2021-01-06 16:56:24,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:24,533 INFO L93 Difference]: Finished difference Result 163 states and 169 transitions. [2021-01-06 16:56:24,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 16:56:24,535 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 129 [2021-01-06 16:56:24,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:24,536 INFO L225 Difference]: With dead ends: 163 [2021-01-06 16:56:24,536 INFO L226 Difference]: Without dead ends: 138 [2021-01-06 16:56:24,537 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 125 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 16:56:24,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-01-06 16:56:24,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-01-06 16:56:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2021-01-06 16:56:24,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 139 transitions. [2021-01-06 16:56:24,544 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 139 transitions. Word has length 129 [2021-01-06 16:56:24,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:24,544 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 139 transitions. [2021-01-06 16:56:24,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2021-01-06 16:56:24,544 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 139 transitions. [2021-01-06 16:56:24,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-01-06 16:56:24,545 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:24,545 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 37, 6, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:24,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-01-06 16:56:24,746 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:24,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:24,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1248288347, now seen corresponding path program 18 times [2021-01-06 16:56:24,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:24,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729483305] [2021-01-06 16:56:24,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:24,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 640 proven. 2072 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-01-06 16:56:25,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729483305] [2021-01-06 16:56:25,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150133012] [2021-01-06 16:56:25,907 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 16:56:26,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-01-06 16:56:26,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:26,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 45 conjunts are in the unsatisfiable core [2021-01-06 16:56:26,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2752 backedges. 811 proven. 386 refuted. 0 times theorem prover too weak. 1555 trivial. 0 not checked. [2021-01-06 16:56:29,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:29,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 17] total 55 [2021-01-06 16:56:29,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668917968] [2021-01-06 16:56:29,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-01-06 16:56:29,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:29,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-01-06 16:56:29,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=2523, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 16:56:29,955 INFO L87 Difference]: Start difference. First operand 137 states and 139 transitions. Second operand 55 states. [2021-01-06 16:56:35,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:35,041 INFO L93 Difference]: Finished difference Result 182 states and 193 transitions. [2021-01-06 16:56:35,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-01-06 16:56:35,042 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 135 [2021-01-06 16:56:35,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:35,043 INFO L225 Difference]: With dead ends: 182 [2021-01-06 16:56:35,043 INFO L226 Difference]: Without dead ends: 157 [2021-01-06 16:56:35,045 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 111 SyntacticMatches, 12 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=535, Invalid=2657, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 16:56:35,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-01-06 16:56:35,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 146. [2021-01-06 16:56:35,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2021-01-06 16:56:35,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 148 transitions. [2021-01-06 16:56:35,053 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 148 transitions. Word has length 135 [2021-01-06 16:56:35,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:35,053 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 148 transitions. [2021-01-06 16:56:35,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2021-01-06 16:56:35,054 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 148 transitions. [2021-01-06 16:56:35,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-01-06 16:56:35,054 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:35,055 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 39, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:35,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 16:56:35,259 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:35,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:35,260 INFO L82 PathProgramCache]: Analyzing trace with hash 527865968, now seen corresponding path program 19 times [2021-01-06 16:56:35,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:35,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940189552] [2021-01-06 16:56:35,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 793 proven. 2301 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 16:56:36,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940189552] [2021-01-06 16:56:36,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810362676] [2021-01-06 16:56:36,648 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 16:56:36,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:36,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 82 conjunts are in the unsatisfiable core [2021-01-06 16:56:36,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3151 backedges. 793 proven. 2301 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 16:56:37,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:37,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-01-06 16:56:37,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540837603] [2021-01-06 16:56:37,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-01-06 16:56:37,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:37,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-01-06 16:56:37,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:56:37,050 INFO L87 Difference]: Start difference. First operand 146 states and 148 transitions. Second operand 43 states. [2021-01-06 16:56:40,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:40,228 INFO L93 Difference]: Finished difference Result 178 states and 183 transitions. [2021-01-06 16:56:40,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-01-06 16:56:40,229 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 144 [2021-01-06 16:56:40,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:40,230 INFO L225 Difference]: With dead ends: 178 [2021-01-06 16:56:40,230 INFO L226 Difference]: Without dead ends: 150 [2021-01-06 16:56:40,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 143 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 16:56:40,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-01-06 16:56:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-01-06 16:56:40,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2021-01-06 16:56:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 151 transitions. [2021-01-06 16:56:40,239 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 151 transitions. Word has length 144 [2021-01-06 16:56:40,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:40,240 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 151 transitions. [2021-01-06 16:56:40,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2021-01-06 16:56:40,240 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 151 transitions. [2021-01-06 16:56:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-01-06 16:56:40,241 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:40,241 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 40, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:40,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:56:40,457 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:40,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:40,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1452807513, now seen corresponding path program 20 times [2021-01-06 16:56:40,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:40,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777295977] [2021-01-06 16:56:40,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:40,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 813 proven. 2420 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 16:56:41,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777295977] [2021-01-06 16:56:41,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613947368] [2021-01-06 16:56:41,910 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 16:56:42,002 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:56:42,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:42,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 97 conjunts are in the unsatisfiable core [2021-01-06 16:56:42,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 3290 backedges. 0 proven. 3290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:56:42,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:42,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 50] total 51 [2021-01-06 16:56:42,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465980350] [2021-01-06 16:56:42,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-01-06 16:56:42,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:42,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-01-06 16:56:42,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2410, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:56:42,652 INFO L87 Difference]: Start difference. First operand 149 states and 151 transitions. Second operand 51 states. [2021-01-06 16:56:47,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:56:47,310 INFO L93 Difference]: Finished difference Result 202 states and 214 transitions. [2021-01-06 16:56:47,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-01-06 16:56:47,311 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 147 [2021-01-06 16:56:47,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:56:47,314 INFO L225 Difference]: With dead ends: 202 [2021-01-06 16:56:47,314 INFO L226 Difference]: Without dead ends: 174 [2021-01-06 16:56:47,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 140 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=140, Invalid=2410, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 16:56:47,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-01-06 16:56:47,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-01-06 16:56:47,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2021-01-06 16:56:47,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 175 transitions. [2021-01-06 16:56:47,331 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 175 transitions. Word has length 147 [2021-01-06 16:56:47,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:56:47,331 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 175 transitions. [2021-01-06 16:56:47,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2021-01-06 16:56:47,331 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 175 transitions. [2021-01-06 16:56:47,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-01-06 16:56:47,332 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:56:47,332 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 48, 7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:56:47,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 16:56:47,547 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:56:47,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:56:47,547 INFO L82 PathProgramCache]: Analyzing trace with hash 103786457, now seen corresponding path program 21 times [2021-01-06 16:56:47,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:56:47,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976059776] [2021-01-06 16:56:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:56:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:56:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 973 proven. 3480 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-01-06 16:56:49,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976059776] [2021-01-06 16:56:49,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864111639] [2021-01-06 16:56:49,463 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 16:56:49,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-01-06 16:56:49,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:56:49,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 16:56:49,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:56:51,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4510 backedges. 1096 proven. 77 refuted. 0 times theorem prover too weak. 3337 trivial. 0 not checked. [2021-01-06 16:56:51,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:56:51,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 12] total 61 [2021-01-06 16:56:51,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526816340] [2021-01-06 16:56:51,622 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-01-06 16:56:51,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:56:51,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-01-06 16:56:51,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=3261, Unknown=0, NotChecked=0, Total=3660 [2021-01-06 16:56:51,624 INFO L87 Difference]: Start difference. First operand 173 states and 175 transitions. Second operand 61 states. [2021-01-06 16:57:04,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:04,454 INFO L93 Difference]: Finished difference Result 221 states and 232 transitions. [2021-01-06 16:57:04,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-01-06 16:57:04,454 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 171 [2021-01-06 16:57:04,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:04,455 INFO L225 Difference]: With dead ends: 221 [2021-01-06 16:57:04,455 INFO L226 Difference]: Without dead ends: 193 [2021-01-06 16:57:04,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 166 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 10.3s TimeCoverageRelationStatistics Valid=876, Invalid=4824, Unknown=0, NotChecked=0, Total=5700 [2021-01-06 16:57:04,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-01-06 16:57:04,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 182. [2021-01-06 16:57:04,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2021-01-06 16:57:04,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 184 transitions. [2021-01-06 16:57:04,467 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 184 transitions. Word has length 171 [2021-01-06 16:57:04,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:04,468 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 184 transitions. [2021-01-06 16:57:04,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2021-01-06 16:57:04,468 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 184 transitions. [2021-01-06 16:57:04,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-01-06 16:57:04,469 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:04,469 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 50, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:04,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:57:04,673 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:04,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:04,673 INFO L82 PathProgramCache]: Analyzing trace with hash -922171854, now seen corresponding path program 22 times [2021-01-06 16:57:04,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:04,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387869755] [2021-01-06 16:57:04,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:06,974 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 1165 proven. 3775 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 16:57:06,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387869755] [2021-01-06 16:57:06,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413174140] [2021-01-06 16:57:06,975 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 16:57:07,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:57:07,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:57:07,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 104 conjunts are in the unsatisfiable core [2021-01-06 16:57:07,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:57:07,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5017 backedges. 1165 proven. 3775 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 16:57:07,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:57:07,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-01-06 16:57:07,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316810495] [2021-01-06 16:57:07,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-01-06 16:57:07,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:57:07,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-01-06 16:57:07,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:57:07,507 INFO L87 Difference]: Start difference. First operand 182 states and 184 transitions. Second operand 54 states. [2021-01-06 16:57:13,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:57:13,141 INFO L93 Difference]: Finished difference Result 217 states and 222 transitions. [2021-01-06 16:57:13,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-01-06 16:57:13,142 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 180 [2021-01-06 16:57:13,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:57:13,144 INFO L225 Difference]: With dead ends: 217 [2021-01-06 16:57:13,144 INFO L226 Difference]: Without dead ends: 186 [2021-01-06 16:57:13,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 179 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 16:57:13,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-01-06 16:57:13,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-01-06 16:57:13,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2021-01-06 16:57:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 187 transitions. [2021-01-06 16:57:13,154 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 187 transitions. Word has length 180 [2021-01-06 16:57:13,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:57:13,155 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 187 transitions. [2021-01-06 16:57:13,155 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2021-01-06 16:57:13,155 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 187 transitions. [2021-01-06 16:57:13,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-01-06 16:57:13,156 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:57:13,156 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 51, 8, 1, 1, 1, 1, 1, 1] [2021-01-06 16:57:13,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 16:57:13,358 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:57:13,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:57:13,359 INFO L82 PathProgramCache]: Analyzing trace with hash -237256037, now seen corresponding path program 23 times [2021-01-06 16:57:13,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:57:13,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539255496] [2021-01-06 16:57:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:57:13,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:57:15,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5192 backedges. 1188 proven. 3927 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-01-06 16:57:15,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539255496] [2021-01-06 16:57:15,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311039079] [2021-01-06 16:57:15,759 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