/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/float-benchs/zonotope_3.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 06:07:39,774 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 06:07:39,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 06:07:39,837 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 06:07:39,837 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 06:07:39,841 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 06:07:39,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 06:07:39,850 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 06:07:39,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 06:07:39,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 06:07:39,863 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 06:07:39,867 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 06:07:39,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 06:07:39,869 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 06:07:39,871 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 06:07:39,873 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 06:07:39,888 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 06:07:39,889 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 06:07:39,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 06:07:39,900 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 06:07:39,905 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 06:07:39,907 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 06:07:39,909 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 06:07:39,910 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 06:07:39,919 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-23 06:07:39,932 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 06:07:39,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 06:07:39,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 06:07:39,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 06:07:39,937 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 06:07:39,937 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 06:07:39,938 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 06:07:39,938 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 06:07:39,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 06:07:39,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 06:07:39,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 06:07:39,948 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 06:07:40,000 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 06:07:40,001 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 06:07:40,005 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 06:07:40,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 06:07:40,006 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 06:07:40,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 06:07:40,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 06:07:40,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 06:07:40,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 06:07:40,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 06:07:40,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 06:07:40,009 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 06:07:40,009 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 06:07:40,009 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 06:07:40,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 06:07:40,010 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 06:07:40,010 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 06:07:40,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 06:07:40,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 06:07:40,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 06:07:40,011 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 06:07:40,011 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 06:07:40,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 06:07:40,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 06:07:40,012 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 06:07:40,012 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 06:07:40,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 06:07:40,523 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 06:07:40,526 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 06:07:40,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 06:07:40,529 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 06:07:40,531 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/zonotope_3.c [2020-12-23 06:07:40,624 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9ba1efe29/56de5df794dc4fd29545d16cfd76748e/FLAGd19611f72 [2020-12-23 06:07:41,292 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 06:07:41,293 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/float-benchs/zonotope_3.c [2020-12-23 06:07:41,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9ba1efe29/56de5df794dc4fd29545d16cfd76748e/FLAGd19611f72 [2020-12-23 06:07:41,615 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9ba1efe29/56de5df794dc4fd29545d16cfd76748e [2020-12-23 06:07:41,619 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 06:07:41,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 06:07:41,625 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 06:07:41,625 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 06:07:41,630 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 06:07:41,632 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:07:41" (1/1) ... [2020-12-23 06:07:41,634 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f99a90e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:41, skipping insertion in model container [2020-12-23 06:07:41,635 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 06:07:41" (1/1) ... [2020-12-23 06:07:41,646 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 06:07:41,667 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 06:07:41,878 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/float-benchs/zonotope_3.c[604,617] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~u~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~u~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] [2020-12-23 06:07:41,905 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:07:41,916 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 06:07:41,931 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/float-benchs/zonotope_3.c[604,617] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~u~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~i~0,] left hand side expression in assignment: lhs: VariableLHS[~x~0,] left hand side expression in assignment: lhs: VariableLHS[~y~0,] left hand side expression in assignment: lhs: VariableLHS[~z~0,] left hand side expression in assignment: lhs: VariableLHS[~u~0,] left hand side expression in assignment: lhs: VariableLHS[~v~0,] left hand side expression in assignment: lhs: VariableLHS[~t~0,] [2020-12-23 06:07:41,940 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 06:07:41,958 INFO L208 MainTranslator]: Completed translation [2020-12-23 06:07:41,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:41 WrapperNode [2020-12-23 06:07:41,958 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 06:07:41,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 06:07:41,960 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 06:07:41,960 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 06:07:41,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:41" (1/1) ... [2020-12-23 06:07:41,979 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:41" (1/1) ... [2020-12-23 06:07:42,004 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 06:07:42,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 06:07:42,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 06:07:42,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 06:07:42,018 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:41" (1/1) ... [2020-12-23 06:07:42,018 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:41" (1/1) ... [2020-12-23 06:07:42,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:41" (1/1) ... [2020-12-23 06:07:42,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:41" (1/1) ... [2020-12-23 06:07:42,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:41" (1/1) ... [2020-12-23 06:07:42,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:41" (1/1) ... [2020-12-23 06:07:42,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:41" (1/1) ... [2020-12-23 06:07:42,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 06:07:42,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 06:07:42,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 06:07:42,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 06:07:42,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:41" (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 [2020-12-23 06:07:42,143 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 06:07:42,143 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 06:07:42,143 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 06:07:42,143 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 06:07:42,508 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 06:07:42,508 INFO L299 CfgBuilder]: Removed 25 assume(true) statements. [2020-12-23 06:07:42,511 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:07:42 BoogieIcfgContainer [2020-12-23 06:07:42,511 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 06:07:42,513 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 06:07:42,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 06:07:42,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 06:07:42,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 06:07:41" (1/3) ... [2020-12-23 06:07:42,525 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145c8bb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:07:42, skipping insertion in model container [2020-12-23 06:07:42,525 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 06:07:41" (2/3) ... [2020-12-23 06:07:42,526 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@145c8bb6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 06:07:42, skipping insertion in model container [2020-12-23 06:07:42,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 06:07:42" (3/3) ... [2020-12-23 06:07:42,528 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_3.c [2020-12-23 06:07:42,542 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 06:07:42,547 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 06:07:42,570 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-23 06:07:42,624 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 06:07:42,625 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 06:07:42,625 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 06:07:42,625 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 06:07:42,625 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 06:07:42,625 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 06:07:42,625 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 06:07:42,626 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 06:07:42,650 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-12-23 06:07:42,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 06:07:42,658 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:42,659 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:42,660 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:42,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:42,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1466747552, now seen corresponding path program 1 times [2020-12-23 06:07:42,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:42,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245877115] [2020-12-23 06:07:42,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:42,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:42,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:42,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245877115] [2020-12-23 06:07:43,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 06:07:43,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 06:07:43,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916064623] [2020-12-23 06:07:43,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-23 06:07:43,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:43,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-23 06:07:43,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-23 06:07:43,064 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-12-23 06:07:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:43,126 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2020-12-23 06:07:43,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-23 06:07:43,128 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-12-23 06:07:43,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:43,139 INFO L225 Difference]: With dead ends: 46 [2020-12-23 06:07:43,139 INFO L226 Difference]: Without dead ends: 26 [2020-12-23 06:07:43,143 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 [2020-12-23 06:07:43,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-23 06:07:43,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 19. [2020-12-23 06:07:43,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-23 06:07:43,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-23 06:07:43,184 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 10 [2020-12-23 06:07:43,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:43,184 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-23 06:07:43,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-23 06:07:43,185 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-23 06:07:43,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-23 06:07:43,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:43,186 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:43,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 06:07:43,186 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:43,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:43,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1082938571, now seen corresponding path program 1 times [2020-12-23 06:07:43,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:43,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54518715] [2020-12-23 06:07:43,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:43,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54518715] [2020-12-23 06:07:43,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79669171] [2020-12-23 06:07:43,305 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 [2020-12-23 06:07:43,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:43,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-23 06:07:43,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:43,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:43,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-23 06:07:43,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846718634] [2020-12-23 06:07:43,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 06:07:43,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:43,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 06:07:43,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:07:43,516 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 5 states. [2020-12-23 06:07:43,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:43,545 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-12-23 06:07:43,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-23 06:07:43,546 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-12-23 06:07:43,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:43,547 INFO L225 Difference]: With dead ends: 38 [2020-12-23 06:07:43,547 INFO L226 Difference]: Without dead ends: 34 [2020-12-23 06:07:43,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-23 06:07:43,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-12-23 06:07:43,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2020-12-23 06:07:43,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-23 06:07:43,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-12-23 06:07:43,556 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 18 [2020-12-23 06:07:43,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:43,556 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-12-23 06:07:43,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 06:07:43,557 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-12-23 06:07:43,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-23 06:07:43,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:43,558 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:43,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-23 06:07:43,773 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:43,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:43,774 INFO L82 PathProgramCache]: Analyzing trace with hash 294705462, now seen corresponding path program 2 times [2020-12-23 06:07:43,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:43,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936221007] [2020-12-23 06:07:43,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:43,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:43,939 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:43,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936221007] [2020-12-23 06:07:43,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199838722] [2020-12-23 06:07:43,940 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 [2020-12-23 06:07:44,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:44,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:44,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-23 06:07:44,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:44,120 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:44,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:44,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-23 06:07:44,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89899583] [2020-12-23 06:07:44,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 06:07:44,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:44,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 06:07:44,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:07:44,129 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 6 states. [2020-12-23 06:07:44,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:44,188 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-12-23 06:07:44,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 06:07:44,190 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-23 06:07:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:44,191 INFO L225 Difference]: With dead ends: 46 [2020-12-23 06:07:44,191 INFO L226 Difference]: Without dead ends: 42 [2020-12-23 06:07:44,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-23 06:07:44,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-23 06:07:44,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2020-12-23 06:07:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-23 06:07:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-12-23 06:07:44,208 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 26 [2020-12-23 06:07:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:44,208 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-12-23 06:07:44,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 06:07:44,209 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-12-23 06:07:44,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-12-23 06:07:44,212 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:44,213 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:44,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:44,428 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:44,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:44,429 INFO L82 PathProgramCache]: Analyzing trace with hash -529808735, now seen corresponding path program 3 times [2020-12-23 06:07:44,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:44,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401983381] [2020-12-23 06:07:44,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:44,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401983381] [2020-12-23 06:07:44,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486214060] [2020-12-23 06:07:44,512 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 [2020-12-23 06:07:44,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 06:07:44,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:44,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-23 06:07:44,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:44,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:44,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-23 06:07:44,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734211414] [2020-12-23 06:07:44,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-23 06:07:44,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:44,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-23 06:07:44,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:07:44,672 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 7 states. [2020-12-23 06:07:44,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:44,704 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-12-23 06:07:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 06:07:44,705 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 34 [2020-12-23 06:07:44,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:44,706 INFO L225 Difference]: With dead ends: 54 [2020-12-23 06:07:44,706 INFO L226 Difference]: Without dead ends: 50 [2020-12-23 06:07:44,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-23 06:07:44,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-23 06:07:44,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2020-12-23 06:07:44,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-23 06:07:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-12-23 06:07:44,722 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 34 [2020-12-23 06:07:44,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:44,722 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-12-23 06:07:44,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-23 06:07:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-12-23 06:07:44,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-23 06:07:44,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:44,726 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:44,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:44,940 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:44,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:44,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1994920204, now seen corresponding path program 4 times [2020-12-23 06:07:44,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:44,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579170654] [2020-12-23 06:07:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:45,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579170654] [2020-12-23 06:07:45,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057836177] [2020-12-23 06:07:45,026 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:45,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:45,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:45,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-23 06:07:45,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:45,187 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:45,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:45,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-23 06:07:45,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949338251] [2020-12-23 06:07:45,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-23 06:07:45,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:45,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-23 06:07:45,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:07:45,196 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 8 states. [2020-12-23 06:07:45,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:45,237 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-12-23 06:07:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 06:07:45,238 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-12-23 06:07:45,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:45,241 INFO L225 Difference]: With dead ends: 62 [2020-12-23 06:07:45,241 INFO L226 Difference]: Without dead ends: 58 [2020-12-23 06:07:45,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-23 06:07:45,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-23 06:07:45,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 51. [2020-12-23 06:07:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-23 06:07:45,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-12-23 06:07:45,265 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 42 [2020-12-23 06:07:45,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:45,266 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-12-23 06:07:45,266 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-23 06:07:45,266 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-12-23 06:07:45,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-23 06:07:45,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:45,270 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:45,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:45,484 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:45,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:45,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1546599305, now seen corresponding path program 5 times [2020-12-23 06:07:45,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:45,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938804251] [2020-12-23 06:07:45,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:45,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938804251] [2020-12-23 06:07:45,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945172432] [2020-12-23 06:07:45,649 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:45,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-23 06:07:45,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:45,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-23 06:07:45,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:45,859 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:45,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:45,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-23 06:07:45,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717468012] [2020-12-23 06:07:45,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 06:07:45,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:45,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 06:07:45,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:07:45,868 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 9 states. [2020-12-23 06:07:45,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:45,927 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-12-23 06:07:45,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 06:07:45,928 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 50 [2020-12-23 06:07:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:45,935 INFO L225 Difference]: With dead ends: 70 [2020-12-23 06:07:45,935 INFO L226 Difference]: Without dead ends: 66 [2020-12-23 06:07:45,936 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-23 06:07:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-23 06:07:45,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-12-23 06:07:45,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-23 06:07:45,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-12-23 06:07:45,958 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 50 [2020-12-23 06:07:45,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:45,958 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-12-23 06:07:45,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 06:07:45,958 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-12-23 06:07:45,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-23 06:07:45,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:45,961 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:46,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-23 06:07:46,175 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:46,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:46,176 INFO L82 PathProgramCache]: Analyzing trace with hash 988863714, now seen corresponding path program 6 times [2020-12-23 06:07:46,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:46,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555728536] [2020-12-23 06:07:46,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:46,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555728536] [2020-12-23 06:07:46,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869242355] [2020-12-23 06:07:46,280 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:46,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-23 06:07:46,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:46,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 06:07:46,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:46,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:46,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-23 06:07:46,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770095368] [2020-12-23 06:07:46,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 06:07:46,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:46,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 06:07:46,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:07:46,496 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 10 states. [2020-12-23 06:07:46,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:46,539 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-12-23 06:07:46,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 06:07:46,540 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 58 [2020-12-23 06:07:46,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:46,540 INFO L225 Difference]: With dead ends: 78 [2020-12-23 06:07:46,541 INFO L226 Difference]: Without dead ends: 74 [2020-12-23 06:07:46,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-23 06:07:46,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-23 06:07:46,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 67. [2020-12-23 06:07:46,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-23 06:07:46,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-12-23 06:07:46,548 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 58 [2020-12-23 06:07:46,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:46,548 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-12-23 06:07:46,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 06:07:46,549 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-12-23 06:07:46,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-23 06:07:46,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:46,550 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:46,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:46,764 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:46,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:46,765 INFO L82 PathProgramCache]: Analyzing trace with hash 353589837, now seen corresponding path program 7 times [2020-12-23 06:07:46,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:46,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848999073] [2020-12-23 06:07:46,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:46,890 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:46,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848999073] [2020-12-23 06:07:46,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436190625] [2020-12-23 06:07:46,891 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:47,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:47,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 06:07:47,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:47,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:47,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-23 06:07:47,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487802458] [2020-12-23 06:07:47,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 06:07:47,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:47,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 06:07:47,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:07:47,162 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 11 states. [2020-12-23 06:07:47,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:47,249 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2020-12-23 06:07:47,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 06:07:47,250 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-12-23 06:07:47,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:47,251 INFO L225 Difference]: With dead ends: 86 [2020-12-23 06:07:47,251 INFO L226 Difference]: Without dead ends: 82 [2020-12-23 06:07:47,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-23 06:07:47,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-23 06:07:47,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2020-12-23 06:07:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-23 06:07:47,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-12-23 06:07:47,265 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 66 [2020-12-23 06:07:47,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:47,265 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-12-23 06:07:47,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 06:07:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-12-23 06:07:47,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-23 06:07:47,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:47,266 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:47,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:47,468 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:47,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:47,469 INFO L82 PathProgramCache]: Analyzing trace with hash 268647608, now seen corresponding path program 8 times [2020-12-23 06:07:47,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:47,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694835069] [2020-12-23 06:07:47,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:47,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:47,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694835069] [2020-12-23 06:07:47,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898159184] [2020-12-23 06:07:47,641 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:47,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:47,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:47,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 06:07:47,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:47,860 INFO L134 CoverageAnalysis]: Checked inductivity of 232 backedges. 0 proven. 232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:47,860 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:47,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-23 06:07:47,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583384137] [2020-12-23 06:07:47,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 06:07:47,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:47,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 06:07:47,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:07:47,862 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 12 states. [2020-12-23 06:07:47,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:47,923 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-12-23 06:07:47,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 06:07:47,924 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-12-23 06:07:47,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:47,925 INFO L225 Difference]: With dead ends: 94 [2020-12-23 06:07:47,925 INFO L226 Difference]: Without dead ends: 90 [2020-12-23 06:07:47,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-23 06:07:47,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-12-23 06:07:47,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2020-12-23 06:07:47,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-23 06:07:47,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-12-23 06:07:47,934 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 74 [2020-12-23 06:07:47,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:47,934 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-12-23 06:07:47,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 06:07:47,934 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-12-23 06:07:47,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-23 06:07:47,935 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:47,935 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:48,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-23 06:07:48,149 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:48,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:48,150 INFO L82 PathProgramCache]: Analyzing trace with hash 244024355, now seen corresponding path program 9 times [2020-12-23 06:07:48,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:48,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254863374] [2020-12-23 06:07:48,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:48,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:48,306 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:48,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254863374] [2020-12-23 06:07:48,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064012021] [2020-12-23 06:07:48,307 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:48,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-23 06:07:48,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:48,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 06:07:48,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:48,589 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:48,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:48,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-23 06:07:48,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116959127] [2020-12-23 06:07:48,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 06:07:48,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:48,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 06:07:48,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:07:48,592 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 13 states. [2020-12-23 06:07:48,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:48,643 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2020-12-23 06:07:48,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 06:07:48,643 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-12-23 06:07:48,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:48,644 INFO L225 Difference]: With dead ends: 102 [2020-12-23 06:07:48,644 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 06:07:48,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-23 06:07:48,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 06:07:48,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 91. [2020-12-23 06:07:48,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 06:07:48,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2020-12-23 06:07:48,653 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 82 [2020-12-23 06:07:48,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:48,654 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2020-12-23 06:07:48,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 06:07:48,654 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2020-12-23 06:07:48,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-12-23 06:07:48,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:48,655 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:48,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:48,869 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:48,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:48,870 INFO L82 PathProgramCache]: Analyzing trace with hash -126406514, now seen corresponding path program 10 times [2020-12-23 06:07:48,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:48,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303645701] [2020-12-23 06:07:48,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:48,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:49,070 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:49,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303645701] [2020-12-23 06:07:49,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652981771] [2020-12-23 06:07:49,070 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:49,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:49,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:49,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 06:07:49,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 0 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:49,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:49,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-23 06:07:49,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026167105] [2020-12-23 06:07:49,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 06:07:49,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:49,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 06:07:49,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:07:49,319 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand 14 states. [2020-12-23 06:07:49,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:49,379 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2020-12-23 06:07:49,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 06:07:49,380 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 90 [2020-12-23 06:07:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:49,381 INFO L225 Difference]: With dead ends: 110 [2020-12-23 06:07:49,382 INFO L226 Difference]: Without dead ends: 106 [2020-12-23 06:07:49,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-23 06:07:49,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-23 06:07:49,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 99. [2020-12-23 06:07:49,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-23 06:07:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2020-12-23 06:07:49,389 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 90 [2020-12-23 06:07:49,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:49,389 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2020-12-23 06:07:49,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 06:07:49,389 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2020-12-23 06:07:49,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-23 06:07:49,391 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:49,391 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:49,604 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:49,605 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:49,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:49,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1164885511, now seen corresponding path program 11 times [2020-12-23 06:07:49,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:49,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314508093] [2020-12-23 06:07:49,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:49,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:49,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314508093] [2020-12-23 06:07:49,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556880077] [2020-12-23 06:07:49,820 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:49,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-23 06:07:49,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:49,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 06:07:49,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:50,110 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:50,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:50,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-23 06:07:50,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890060229] [2020-12-23 06:07:50,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 06:07:50,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:50,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 06:07:50,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:07:50,113 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand 15 states. [2020-12-23 06:07:50,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:50,175 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2020-12-23 06:07:50,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 06:07:50,176 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 98 [2020-12-23 06:07:50,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:50,177 INFO L225 Difference]: With dead ends: 118 [2020-12-23 06:07:50,177 INFO L226 Difference]: Without dead ends: 114 [2020-12-23 06:07:50,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-23 06:07:50,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-23 06:07:50,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 107. [2020-12-23 06:07:50,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-23 06:07:50,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2020-12-23 06:07:50,183 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 98 [2020-12-23 06:07:50,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:50,184 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2020-12-23 06:07:50,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 06:07:50,184 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2020-12-23 06:07:50,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-23 06:07:50,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:50,185 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:50,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 06:07:50,400 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:50,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:50,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1185200228, now seen corresponding path program 12 times [2020-12-23 06:07:50,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:50,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861746982] [2020-12-23 06:07:50,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:50,647 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:50,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861746982] [2020-12-23 06:07:50,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125322067] [2020-12-23 06:07:50,648 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:50,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-23 06:07:50,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:50,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 06:07:50,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:50,969 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:50,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:50,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-23 06:07:50,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538171853] [2020-12-23 06:07:50,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 06:07:50,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:50,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 06:07:50,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:07:50,972 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand 16 states. [2020-12-23 06:07:51,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:51,050 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2020-12-23 06:07:51,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 06:07:51,051 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 106 [2020-12-23 06:07:51,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:51,052 INFO L225 Difference]: With dead ends: 126 [2020-12-23 06:07:51,052 INFO L226 Difference]: Without dead ends: 122 [2020-12-23 06:07:51,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-23 06:07:51,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-23 06:07:51,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2020-12-23 06:07:51,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 06:07:51,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2020-12-23 06:07:51,064 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 106 [2020-12-23 06:07:51,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:51,064 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2020-12-23 06:07:51,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 06:07:51,064 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2020-12-23 06:07:51,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-23 06:07:51,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:51,069 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:51,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-23 06:07:51,285 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:51,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:51,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1820552241, now seen corresponding path program 13 times [2020-12-23 06:07:51,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:51,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125362707] [2020-12-23 06:07:51,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 637 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:51,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125362707] [2020-12-23 06:07:51,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572389098] [2020-12-23 06:07:51,515 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:51,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 06:07:51,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:51,862 INFO L134 CoverageAnalysis]: Checked inductivity of 637 backedges. 0 proven. 637 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:51,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:51,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-23 06:07:51,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287967791] [2020-12-23 06:07:51,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 06:07:51,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:51,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 06:07:51,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:07:51,866 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand 17 states. [2020-12-23 06:07:51,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:51,972 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2020-12-23 06:07:51,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 06:07:51,972 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 114 [2020-12-23 06:07:51,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:51,974 INFO L225 Difference]: With dead ends: 134 [2020-12-23 06:07:51,974 INFO L226 Difference]: Without dead ends: 130 [2020-12-23 06:07:51,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-23 06:07:51,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-23 06:07:51,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 123. [2020-12-23 06:07:51,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-12-23 06:07:51,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2020-12-23 06:07:51,984 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 114 [2020-12-23 06:07:51,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:51,984 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2020-12-23 06:07:51,984 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 06:07:51,985 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2020-12-23 06:07:51,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-23 06:07:51,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:51,987 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:52,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 06:07:52,202 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:52,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:52,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1662790598, now seen corresponding path program 14 times [2020-12-23 06:07:52,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:52,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860341993] [2020-12-23 06:07:52,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:52,512 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:52,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860341993] [2020-12-23 06:07:52,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561518019] [2020-12-23 06:07:52,513 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:52,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:52,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:52,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 527 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 06:07:52,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:52,821 INFO L134 CoverageAnalysis]: Checked inductivity of 742 backedges. 0 proven. 742 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:52,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:52,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-23 06:07:52,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317775181] [2020-12-23 06:07:52,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 06:07:52,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:52,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 06:07:52,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:07:52,824 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand 18 states. [2020-12-23 06:07:52,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:52,911 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2020-12-23 06:07:52,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 06:07:52,912 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 122 [2020-12-23 06:07:52,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:52,913 INFO L225 Difference]: With dead ends: 142 [2020-12-23 06:07:52,913 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 06:07:52,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-12-23 06:07:52,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 06:07:52,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 131. [2020-12-23 06:07:52,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 06:07:52,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2020-12-23 06:07:52,920 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 122 [2020-12-23 06:07:52,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:52,920 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2020-12-23 06:07:52,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 06:07:52,920 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2020-12-23 06:07:52,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-23 06:07:52,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:52,922 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:53,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:53,136 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:53,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:53,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1671788965, now seen corresponding path program 15 times [2020-12-23 06:07:53,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:53,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417537237] [2020-12-23 06:07:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:53,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:53,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417537237] [2020-12-23 06:07:53,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191364473] [2020-12-23 06:07:53,437 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:53,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-23 06:07:53,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:53,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 06:07:53,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:53,808 INFO L134 CoverageAnalysis]: Checked inductivity of 855 backedges. 0 proven. 855 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:53,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:53,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-23 06:07:53,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81583997] [2020-12-23 06:07:53,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 06:07:53,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:53,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 06:07:53,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:07:53,812 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand 19 states. [2020-12-23 06:07:53,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:53,889 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2020-12-23 06:07:53,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 06:07:53,890 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 130 [2020-12-23 06:07:53,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:53,891 INFO L225 Difference]: With dead ends: 150 [2020-12-23 06:07:53,892 INFO L226 Difference]: Without dead ends: 146 [2020-12-23 06:07:53,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-23 06:07:53,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-23 06:07:53,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 139. [2020-12-23 06:07:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-12-23 06:07:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2020-12-23 06:07:53,899 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 130 [2020-12-23 06:07:53,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:53,900 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2020-12-23 06:07:53,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 06:07:53,900 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2020-12-23 06:07:53,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-23 06:07:53,902 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:53,902 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:54,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 06:07:54,116 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:54,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:54,117 INFO L82 PathProgramCache]: Analyzing trace with hash -309558256, now seen corresponding path program 16 times [2020-12-23 06:07:54,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:54,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405703029] [2020-12-23 06:07:54,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:54,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:54,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405703029] [2020-12-23 06:07:54,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762943002] [2020-12-23 06:07:54,402 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:54,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:07:54,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:54,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-23 06:07:54,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:54,750 INFO L134 CoverageAnalysis]: Checked inductivity of 976 backedges. 0 proven. 976 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:54,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:54,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-23 06:07:54,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123271930] [2020-12-23 06:07:54,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 06:07:54,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:54,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 06:07:54,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:07:54,753 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand 20 states. [2020-12-23 06:07:54,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:54,854 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2020-12-23 06:07:54,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 06:07:54,855 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 138 [2020-12-23 06:07:54,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:54,856 INFO L225 Difference]: With dead ends: 158 [2020-12-23 06:07:54,856 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 06:07:54,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-23 06:07:54,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 06:07:54,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 147. [2020-12-23 06:07:54,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-23 06:07:54,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2020-12-23 06:07:54,864 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 138 [2020-12-23 06:07:54,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:54,864 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2020-12-23 06:07:54,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 06:07:54,865 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2020-12-23 06:07:54,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-23 06:07:54,866 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:54,866 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:55,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 06:07:55,082 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:55,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:55,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1164178299, now seen corresponding path program 17 times [2020-12-23 06:07:55,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:55,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090642984] [2020-12-23 06:07:55,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:55,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:55,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:55,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090642984] [2020-12-23 06:07:55,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869759619] [2020-12-23 06:07:55,409 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:55,631 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-23 06:07:55,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:55,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 626 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 06:07:55,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:55,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:55,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-23 06:07:55,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372941268] [2020-12-23 06:07:55,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-23 06:07:55,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:55,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-23 06:07:55,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:07:55,839 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand 21 states. [2020-12-23 06:07:55,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:55,921 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2020-12-23 06:07:55,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 06:07:55,922 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 146 [2020-12-23 06:07:55,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:55,923 INFO L225 Difference]: With dead ends: 166 [2020-12-23 06:07:55,923 INFO L226 Difference]: Without dead ends: 162 [2020-12-23 06:07:55,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-12-23 06:07:55,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-23 06:07:55,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 155. [2020-12-23 06:07:55,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 06:07:55,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2020-12-23 06:07:55,930 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 146 [2020-12-23 06:07:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:55,930 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2020-12-23 06:07:55,930 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-23 06:07:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2020-12-23 06:07:55,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-12-23 06:07:55,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:55,932 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:56,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 06:07:56,146 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:56,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:56,147 INFO L82 PathProgramCache]: Analyzing trace with hash 2062993382, now seen corresponding path program 18 times [2020-12-23 06:07:56,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:56,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977520706] [2020-12-23 06:07:56,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:56,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:56,483 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 0 proven. 1242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:56,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977520706] [2020-12-23 06:07:56,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657969812] [2020-12-23 06:07:56,484 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:56,710 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-23 06:07:56,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:56,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-23 06:07:56,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:56,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1242 backedges. 0 proven. 1242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:56,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:56,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-23 06:07:56,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119600835] [2020-12-23 06:07:56,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 06:07:56,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:56,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 06:07:56,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:07:56,933 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand 22 states. [2020-12-23 06:07:57,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:57,044 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2020-12-23 06:07:57,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 06:07:57,045 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 154 [2020-12-23 06:07:57,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:57,046 INFO L225 Difference]: With dead ends: 174 [2020-12-23 06:07:57,046 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 06:07:57,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-23 06:07:57,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 06:07:57,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 163. [2020-12-23 06:07:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 06:07:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2020-12-23 06:07:57,054 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 154 [2020-12-23 06:07:57,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:57,055 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2020-12-23 06:07:57,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 06:07:57,055 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2020-12-23 06:07:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-12-23 06:07:57,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:57,057 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:57,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:57,271 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:57,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:57,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1559232175, now seen corresponding path program 19 times [2020-12-23 06:07:57,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:57,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736902794] [2020-12-23 06:07:57,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 0 proven. 1387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:57,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736902794] [2020-12-23 06:07:57,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490490200] [2020-12-23 06:07:57,623 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:57,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 692 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-23 06:07:57,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 0 proven. 1387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:58,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:58,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-23 06:07:58,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494433282] [2020-12-23 06:07:58,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-23 06:07:58,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:58,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-23 06:07:58,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:07:58,028 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand 23 states. [2020-12-23 06:07:58,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:58,139 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2020-12-23 06:07:58,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 06:07:58,139 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 162 [2020-12-23 06:07:58,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:58,141 INFO L225 Difference]: With dead ends: 182 [2020-12-23 06:07:58,141 INFO L226 Difference]: Without dead ends: 178 [2020-12-23 06:07:58,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-23 06:07:58,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-23 06:07:58,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 171. [2020-12-23 06:07:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-23 06:07:58,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2020-12-23 06:07:58,150 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 162 [2020-12-23 06:07:58,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:58,150 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2020-12-23 06:07:58,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-23 06:07:58,151 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2020-12-23 06:07:58,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-12-23 06:07:58,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:58,153 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:58,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:58,368 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:58,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:58,369 INFO L82 PathProgramCache]: Analyzing trace with hash -679829572, now seen corresponding path program 20 times [2020-12-23 06:07:58,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:58,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878465629] [2020-12-23 06:07:58,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:07:58,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:58,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878465629] [2020-12-23 06:07:58,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568407439] [2020-12-23 06:07:58,794 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:07:58,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:07:58,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:07:58,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 725 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-23 06:07:58,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:07:59,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:07:59,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:07:59,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-12-23 06:07:59,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319977622] [2020-12-23 06:07:59,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-23 06:07:59,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:07:59,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-23 06:07:59,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:07:59,223 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand 24 states. [2020-12-23 06:07:59,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:07:59,313 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2020-12-23 06:07:59,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 06:07:59,314 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 170 [2020-12-23 06:07:59,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:07:59,315 INFO L225 Difference]: With dead ends: 190 [2020-12-23 06:07:59,316 INFO L226 Difference]: Without dead ends: 186 [2020-12-23 06:07:59,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-12-23 06:07:59,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-23 06:07:59,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 179. [2020-12-23 06:07:59,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-23 06:07:59,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2020-12-23 06:07:59,324 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 170 [2020-12-23 06:07:59,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:07:59,324 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2020-12-23 06:07:59,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-23 06:07:59,325 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2020-12-23 06:07:59,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-23 06:07:59,327 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:07:59,327 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:07:59,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-23 06:07:59,542 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:07:59,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:07:59,543 INFO L82 PathProgramCache]: Analyzing trace with hash 922854183, now seen corresponding path program 21 times [2020-12-23 06:07:59,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:07:59,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243647170] [2020-12-23 06:07:59,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:07:59,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 1701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:00,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243647170] [2020-12-23 06:08:00,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561846767] [2020-12-23 06:08:00,013 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:00,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-23 06:08:00,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:00,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 758 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-23 06:08:00,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:00,475 INFO L134 CoverageAnalysis]: Checked inductivity of 1701 backedges. 0 proven. 1701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:00,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:00,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-23 06:08:00,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008040397] [2020-12-23 06:08:00,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-23 06:08:00,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:00,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-23 06:08:00,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:08:00,478 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand 25 states. [2020-12-23 06:08:00,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:00,582 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2020-12-23 06:08:00,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 06:08:00,589 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 178 [2020-12-23 06:08:00,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:00,590 INFO L225 Difference]: With dead ends: 198 [2020-12-23 06:08:00,590 INFO L226 Difference]: Without dead ends: 194 [2020-12-23 06:08:00,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-23 06:08:00,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-23 06:08:00,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 187. [2020-12-23 06:08:00,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-23 06:08:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2020-12-23 06:08:00,606 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 178 [2020-12-23 06:08:00,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:00,606 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2020-12-23 06:08:00,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-23 06:08:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2020-12-23 06:08:00,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-23 06:08:00,610 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:00,610 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:00,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 06:08:00,826 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:00,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:00,827 INFO L82 PathProgramCache]: Analyzing trace with hash -445641838, now seen corresponding path program 22 times [2020-12-23 06:08:00,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:00,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073873336] [2020-12-23 06:08:00,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1870 backedges. 0 proven. 1870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:01,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073873336] [2020-12-23 06:08:01,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930892717] [2020-12-23 06:08:01,345 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:01,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:01,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:01,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-23 06:08:01,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1870 backedges. 0 proven. 1870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:01,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:01,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-12-23 06:08:01,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495889553] [2020-12-23 06:08:01,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-23 06:08:01,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:01,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-23 06:08:01,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:08:01,805 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand 26 states. [2020-12-23 06:08:01,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:01,906 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2020-12-23 06:08:01,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 06:08:01,906 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 186 [2020-12-23 06:08:01,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:01,909 INFO L225 Difference]: With dead ends: 206 [2020-12-23 06:08:01,909 INFO L226 Difference]: Without dead ends: 202 [2020-12-23 06:08:01,909 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-12-23 06:08:01,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-23 06:08:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 195. [2020-12-23 06:08:01,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-12-23 06:08:01,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2020-12-23 06:08:01,917 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 186 [2020-12-23 06:08:01,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:01,918 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2020-12-23 06:08:01,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-23 06:08:01,918 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2020-12-23 06:08:01,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-23 06:08:01,919 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:01,919 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:02,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:02,128 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:02,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:02,129 INFO L82 PathProgramCache]: Analyzing trace with hash 194042109, now seen corresponding path program 23 times [2020-12-23 06:08:02,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:02,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703796953] [2020-12-23 06:08:02,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:02,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 0 proven. 2047 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:02,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703796953] [2020-12-23 06:08:02,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284962251] [2020-12-23 06:08:02,619 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:02,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-23 06:08:02,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:02,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-23 06:08:02,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:03,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2047 backedges. 0 proven. 2047 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:03,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:03,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-12-23 06:08:03,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31061269] [2020-12-23 06:08:03,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-23 06:08:03,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:03,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-23 06:08:03,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:08:03,166 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand 27 states. [2020-12-23 06:08:03,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:03,288 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2020-12-23 06:08:03,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 06:08:03,289 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 194 [2020-12-23 06:08:03,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:03,291 INFO L225 Difference]: With dead ends: 214 [2020-12-23 06:08:03,291 INFO L226 Difference]: Without dead ends: 210 [2020-12-23 06:08:03,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-12-23 06:08:03,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-23 06:08:03,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 203. [2020-12-23 06:08:03,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-12-23 06:08:03,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2020-12-23 06:08:03,299 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 194 [2020-12-23 06:08:03,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:03,300 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2020-12-23 06:08:03,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-23 06:08:03,300 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2020-12-23 06:08:03,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-12-23 06:08:03,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:03,301 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:03,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 06:08:03,517 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:03,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:03,517 INFO L82 PathProgramCache]: Analyzing trace with hash -684782744, now seen corresponding path program 24 times [2020-12-23 06:08:03,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:03,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31616897] [2020-12-23 06:08:03,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:04,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 2232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:04,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31616897] [2020-12-23 06:08:04,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700713090] [2020-12-23 06:08:04,102 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:04,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-23 06:08:04,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:04,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-23 06:08:04,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:04,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2232 backedges. 0 proven. 2232 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:04,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:04,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-12-23 06:08:04,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037362665] [2020-12-23 06:08:04,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-23 06:08:04,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:04,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-23 06:08:04,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:08:04,649 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand 28 states. [2020-12-23 06:08:04,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:04,776 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2020-12-23 06:08:04,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 06:08:04,777 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 202 [2020-12-23 06:08:04,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:04,779 INFO L225 Difference]: With dead ends: 222 [2020-12-23 06:08:04,779 INFO L226 Difference]: Without dead ends: 218 [2020-12-23 06:08:04,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-12-23 06:08:04,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-12-23 06:08:04,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 211. [2020-12-23 06:08:04,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-12-23 06:08:04,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2020-12-23 06:08:04,787 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 202 [2020-12-23 06:08:04,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:04,788 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2020-12-23 06:08:04,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-23 06:08:04,788 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2020-12-23 06:08:04,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-23 06:08:04,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:04,789 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:05,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:05,003 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:05,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:05,004 INFO L82 PathProgramCache]: Analyzing trace with hash 2065015507, now seen corresponding path program 25 times [2020-12-23 06:08:05,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:05,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523687028] [2020-12-23 06:08:05,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:05,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 2425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:05,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523687028] [2020-12-23 06:08:05,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229146256] [2020-12-23 06:08:05,613 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:05,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-23 06:08:05,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:06,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2425 backedges. 0 proven. 2425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:06,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:06,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-12-23 06:08:06,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484686289] [2020-12-23 06:08:06,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-23 06:08:06,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:06,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-23 06:08:06,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:08:06,126 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand 29 states. [2020-12-23 06:08:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:06,272 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2020-12-23 06:08:06,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 06:08:06,273 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 210 [2020-12-23 06:08:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:06,275 INFO L225 Difference]: With dead ends: 230 [2020-12-23 06:08:06,275 INFO L226 Difference]: Without dead ends: 226 [2020-12-23 06:08:06,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-12-23 06:08:06,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-23 06:08:06,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 219. [2020-12-23 06:08:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-12-23 06:08:06,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2020-12-23 06:08:06,284 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 210 [2020-12-23 06:08:06,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:06,285 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2020-12-23 06:08:06,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-23 06:08:06,285 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2020-12-23 06:08:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2020-12-23 06:08:06,287 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:06,287 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:06,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 06:08:06,501 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:06,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:06,502 INFO L82 PathProgramCache]: Analyzing trace with hash 789552958, now seen corresponding path program 26 times [2020-12-23 06:08:06,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:06,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685778815] [2020-12-23 06:08:06,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2626 backedges. 0 proven. 2626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:07,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685778815] [2020-12-23 06:08:07,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149373943] [2020-12-23 06:08:07,152 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:07,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:07,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:07,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 923 conjuncts, 28 conjunts are in the unsatisfiable core [2020-12-23 06:08:07,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:07,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2626 backedges. 0 proven. 2626 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:07,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:07,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-12-23 06:08:07,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598483393] [2020-12-23 06:08:07,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-23 06:08:07,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:07,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-23 06:08:07,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:08:07,754 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand 30 states. [2020-12-23 06:08:07,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:07,867 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2020-12-23 06:08:07,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 06:08:07,867 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 218 [2020-12-23 06:08:07,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:07,869 INFO L225 Difference]: With dead ends: 238 [2020-12-23 06:08:07,869 INFO L226 Difference]: Without dead ends: 234 [2020-12-23 06:08:07,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-12-23 06:08:07,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-12-23 06:08:07,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 227. [2020-12-23 06:08:07,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-12-23 06:08:07,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2020-12-23 06:08:07,876 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 218 [2020-12-23 06:08:07,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:07,876 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2020-12-23 06:08:07,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-23 06:08:07,877 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2020-12-23 06:08:07,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-23 06:08:07,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:07,878 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:08,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 06:08:08,088 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:08,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:08,089 INFO L82 PathProgramCache]: Analyzing trace with hash 803733673, now seen corresponding path program 27 times [2020-12-23 06:08:08,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:08,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493524781] [2020-12-23 06:08:08,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:08,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2835 backedges. 0 proven. 2835 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:08,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493524781] [2020-12-23 06:08:08,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105849874] [2020-12-23 06:08:08,693 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:09,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-23 06:08:09,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:09,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 956 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-23 06:08:09,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:09,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2835 backedges. 0 proven. 2835 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:09,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:09,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-12-23 06:08:09,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235788062] [2020-12-23 06:08:09,304 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-23 06:08:09,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:09,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-23 06:08:09,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:08:09,306 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand 31 states. [2020-12-23 06:08:09,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:09,450 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2020-12-23 06:08:09,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 06:08:09,450 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 226 [2020-12-23 06:08:09,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:09,452 INFO L225 Difference]: With dead ends: 246 [2020-12-23 06:08:09,453 INFO L226 Difference]: Without dead ends: 242 [2020-12-23 06:08:09,453 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-12-23 06:08:09,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-12-23 06:08:09,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 235. [2020-12-23 06:08:09,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-12-23 06:08:09,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2020-12-23 06:08:09,461 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 226 [2020-12-23 06:08:09,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:09,461 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2020-12-23 06:08:09,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-23 06:08:09,462 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2020-12-23 06:08:09,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-12-23 06:08:09,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:09,463 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:09,677 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 06:08:09,678 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:09,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:09,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1083586796, now seen corresponding path program 28 times [2020-12-23 06:08:09,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:09,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051102322] [2020-12-23 06:08:09,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:09,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:10,362 INFO L134 CoverageAnalysis]: Checked inductivity of 3052 backedges. 0 proven. 3052 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:10,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051102322] [2020-12-23 06:08:10,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192349969] [2020-12-23 06:08:10,363 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:10,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:10,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:10,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-23 06:08:10,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3052 backedges. 0 proven. 3052 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:10,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:10,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-12-23 06:08:10,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729032719] [2020-12-23 06:08:10,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-23 06:08:10,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:10,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-23 06:08:10,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:08:10,929 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand 32 states. [2020-12-23 06:08:11,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:11,098 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2020-12-23 06:08:11,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 06:08:11,099 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 234 [2020-12-23 06:08:11,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:11,101 INFO L225 Difference]: With dead ends: 254 [2020-12-23 06:08:11,101 INFO L226 Difference]: Without dead ends: 250 [2020-12-23 06:08:11,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-12-23 06:08:11,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-23 06:08:11,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 243. [2020-12-23 06:08:11,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-12-23 06:08:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2020-12-23 06:08:11,111 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 234 [2020-12-23 06:08:11,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:11,112 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2020-12-23 06:08:11,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-23 06:08:11,112 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2020-12-23 06:08:11,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2020-12-23 06:08:11,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:11,114 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:11,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-23 06:08:11,327 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:11,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:11,327 INFO L82 PathProgramCache]: Analyzing trace with hash 610267775, now seen corresponding path program 29 times [2020-12-23 06:08:11,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:11,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883211753] [2020-12-23 06:08:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:11,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:12,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3277 backedges. 0 proven. 3277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:12,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883211753] [2020-12-23 06:08:12,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176101023] [2020-12-23 06:08:12,163 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:12,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-23 06:08:12,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:12,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 1022 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-23 06:08:12,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:12,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3277 backedges. 0 proven. 3277 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:12,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:12,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-12-23 06:08:12,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614683769] [2020-12-23 06:08:12,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-23 06:08:12,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:12,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-23 06:08:12,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:08:12,821 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand 33 states. [2020-12-23 06:08:12,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:12,982 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2020-12-23 06:08:12,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 06:08:12,983 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 242 [2020-12-23 06:08:12,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:12,985 INFO L225 Difference]: With dead ends: 262 [2020-12-23 06:08:12,985 INFO L226 Difference]: Without dead ends: 258 [2020-12-23 06:08:12,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 06:08:12,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-12-23 06:08:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 251. [2020-12-23 06:08:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-12-23 06:08:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2020-12-23 06:08:12,994 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 242 [2020-12-23 06:08:12,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:12,995 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2020-12-23 06:08:12,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-23 06:08:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2020-12-23 06:08:12,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2020-12-23 06:08:12,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:12,997 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:13,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:13,211 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:13,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:13,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1433042198, now seen corresponding path program 30 times [2020-12-23 06:08:13,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:13,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138729139] [2020-12-23 06:08:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3510 backedges. 0 proven. 3510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:13,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138729139] [2020-12-23 06:08:13,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432247021] [2020-12-23 06:08:13,940 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:14,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-23 06:08:14,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:14,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 1055 conjuncts, 32 conjunts are in the unsatisfiable core [2020-12-23 06:08:14,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:14,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3510 backedges. 0 proven. 3510 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:14,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:14,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-12-23 06:08:14,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016640458] [2020-12-23 06:08:14,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-23 06:08:14,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:14,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-23 06:08:14,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:08:14,617 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand 34 states. [2020-12-23 06:08:14,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:14,772 INFO L93 Difference]: Finished difference Result 270 states and 270 transitions. [2020-12-23 06:08:14,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 06:08:14,773 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 250 [2020-12-23 06:08:14,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:14,774 INFO L225 Difference]: With dead ends: 270 [2020-12-23 06:08:14,775 INFO L226 Difference]: Without dead ends: 266 [2020-12-23 06:08:14,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 06:08:14,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-23 06:08:14,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 259. [2020-12-23 06:08:14,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-12-23 06:08:14,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2020-12-23 06:08:14,783 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 250 [2020-12-23 06:08:14,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:14,784 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2020-12-23 06:08:14,784 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-23 06:08:14,784 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2020-12-23 06:08:14,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2020-12-23 06:08:14,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:14,785 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:14,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:14,993 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:14,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:14,993 INFO L82 PathProgramCache]: Analyzing trace with hash -1563068331, now seen corresponding path program 31 times [2020-12-23 06:08:14,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:14,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368222194] [2020-12-23 06:08:14,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:15,864 INFO L134 CoverageAnalysis]: Checked inductivity of 3751 backedges. 0 proven. 3751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:15,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368222194] [2020-12-23 06:08:15,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103437034] [2020-12-23 06:08:15,864 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:16,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:16,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 1088 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-23 06:08:16,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:16,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3751 backedges. 0 proven. 3751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:16,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:16,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-12-23 06:08:16,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360097902] [2020-12-23 06:08:16,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-23 06:08:16,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:16,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-23 06:08:16,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:08:16,455 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand 35 states. [2020-12-23 06:08:16,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:16,636 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2020-12-23 06:08:16,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 06:08:16,636 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 258 [2020-12-23 06:08:16,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:16,638 INFO L225 Difference]: With dead ends: 278 [2020-12-23 06:08:16,638 INFO L226 Difference]: Without dead ends: 274 [2020-12-23 06:08:16,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 06:08:16,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-12-23 06:08:16,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 267. [2020-12-23 06:08:16,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-23 06:08:16,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2020-12-23 06:08:16,648 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 258 [2020-12-23 06:08:16,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:16,649 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2020-12-23 06:08:16,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-23 06:08:16,649 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2020-12-23 06:08:16,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-12-23 06:08:16,650 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:16,650 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:16,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:16,858 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:16,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:16,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1659556544, now seen corresponding path program 32 times [2020-12-23 06:08:16,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:16,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483585343] [2020-12-23 06:08:16,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:16,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:17,754 INFO L134 CoverageAnalysis]: Checked inductivity of 4000 backedges. 0 proven. 4000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:17,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483585343] [2020-12-23 06:08:17,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718356399] [2020-12-23 06:08:17,755 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:18,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:18,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:18,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 1121 conjuncts, 34 conjunts are in the unsatisfiable core [2020-12-23 06:08:18,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:18,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4000 backedges. 0 proven. 4000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:18,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:18,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-12-23 06:08:18,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051137292] [2020-12-23 06:08:18,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-23 06:08:18,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:18,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-23 06:08:18,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:08:18,412 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand 36 states. [2020-12-23 06:08:18,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:18,575 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2020-12-23 06:08:18,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 06:08:18,576 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 266 [2020-12-23 06:08:18,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:18,578 INFO L225 Difference]: With dead ends: 286 [2020-12-23 06:08:18,578 INFO L226 Difference]: Without dead ends: 282 [2020-12-23 06:08:18,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 266 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 06:08:18,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-23 06:08:18,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 275. [2020-12-23 06:08:18,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 275 states. [2020-12-23 06:08:18,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2020-12-23 06:08:18,590 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 266 [2020-12-23 06:08:18,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:18,591 INFO L481 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2020-12-23 06:08:18,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-23 06:08:18,591 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2020-12-23 06:08:18,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2020-12-23 06:08:18,593 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:18,593 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:18,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-23 06:08:18,808 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:18,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:18,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1168151083, now seen corresponding path program 33 times [2020-12-23 06:08:18,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:18,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725686943] [2020-12-23 06:08:18,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 0 proven. 4257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:19,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725686943] [2020-12-23 06:08:19,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288981138] [2020-12-23 06:08:19,775 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:20,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-23 06:08:20,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:20,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 1154 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-23 06:08:20,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4257 backedges. 0 proven. 4257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:20,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:20,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-12-23 06:08:20,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124669044] [2020-12-23 06:08:20,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-23 06:08:20,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:20,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-23 06:08:20,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:08:20,500 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand 37 states. [2020-12-23 06:08:20,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:20,653 INFO L93 Difference]: Finished difference Result 294 states and 294 transitions. [2020-12-23 06:08:20,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 06:08:20,654 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 274 [2020-12-23 06:08:20,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:20,655 INFO L225 Difference]: With dead ends: 294 [2020-12-23 06:08:20,656 INFO L226 Difference]: Without dead ends: 290 [2020-12-23 06:08:20,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 06:08:20,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-12-23 06:08:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 283. [2020-12-23 06:08:20,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 283 states. [2020-12-23 06:08:20,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2020-12-23 06:08:20,665 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 274 [2020-12-23 06:08:20,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:20,666 INFO L481 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2020-12-23 06:08:20,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-23 06:08:20,666 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2020-12-23 06:08:20,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2020-12-23 06:08:20,667 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:20,668 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:20,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:20,882 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:20,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:20,882 INFO L82 PathProgramCache]: Analyzing trace with hash -1430145386, now seen corresponding path program 34 times [2020-12-23 06:08:20,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:20,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638446659] [2020-12-23 06:08:20,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:20,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 4522 backedges. 0 proven. 4522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:21,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638446659] [2020-12-23 06:08:21,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739236077] [2020-12-23 06:08:21,871 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:22,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:22,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:22,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 1187 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-23 06:08:22,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 4522 backedges. 0 proven. 4522 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:22,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:22,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-12-23 06:08:22,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707087052] [2020-12-23 06:08:22,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-23 06:08:22,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:22,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-23 06:08:22,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:08:22,514 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand 38 states. [2020-12-23 06:08:22,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:22,684 INFO L93 Difference]: Finished difference Result 302 states and 302 transitions. [2020-12-23 06:08:22,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 06:08:22,684 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 282 [2020-12-23 06:08:22,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:22,686 INFO L225 Difference]: With dead ends: 302 [2020-12-23 06:08:22,686 INFO L226 Difference]: Without dead ends: 298 [2020-12-23 06:08:22,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 06:08:22,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-12-23 06:08:22,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 291. [2020-12-23 06:08:22,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 291 states. [2020-12-23 06:08:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2020-12-23 06:08:22,697 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 282 [2020-12-23 06:08:22,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:22,698 INFO L481 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2020-12-23 06:08:22,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-23 06:08:22,698 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2020-12-23 06:08:22,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2020-12-23 06:08:22,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:22,701 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:22,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-23 06:08:22,916 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:22,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:22,917 INFO L82 PathProgramCache]: Analyzing trace with hash -149340159, now seen corresponding path program 35 times [2020-12-23 06:08:22,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:22,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147462989] [2020-12-23 06:08:22,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:22,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4795 backedges. 0 proven. 4795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:23,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147462989] [2020-12-23 06:08:23,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913133462] [2020-12-23 06:08:23,938 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:24,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-23 06:08:24,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:24,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 1220 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-23 06:08:24,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4795 backedges. 0 proven. 4795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:24,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:24,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-12-23 06:08:24,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327233226] [2020-12-23 06:08:24,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-23 06:08:24,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:24,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-23 06:08:24,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:08:24,658 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand 39 states. [2020-12-23 06:08:24,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:24,855 INFO L93 Difference]: Finished difference Result 310 states and 310 transitions. [2020-12-23 06:08:24,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-23 06:08:24,856 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 290 [2020-12-23 06:08:24,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:24,858 INFO L225 Difference]: With dead ends: 310 [2020-12-23 06:08:24,858 INFO L226 Difference]: Without dead ends: 306 [2020-12-23 06:08:24,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 290 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-12-23 06:08:24,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-12-23 06:08:24,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 299. [2020-12-23 06:08:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-12-23 06:08:24,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 299 transitions. [2020-12-23 06:08:24,867 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 299 transitions. Word has length 290 [2020-12-23 06:08:24,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:24,868 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 299 transitions. [2020-12-23 06:08:24,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-23 06:08:24,868 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 299 transitions. [2020-12-23 06:08:24,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2020-12-23 06:08:24,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:24,870 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:25,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:25,086 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:25,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:25,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1804456340, now seen corresponding path program 36 times [2020-12-23 06:08:25,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:25,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931447292] [2020-12-23 06:08:25,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:25,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:26,144 INFO L134 CoverageAnalysis]: Checked inductivity of 5076 backedges. 0 proven. 5076 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:26,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931447292] [2020-12-23 06:08:26,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471615196] [2020-12-23 06:08:26,145 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:26,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-23 06:08:26,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:26,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 38 conjunts are in the unsatisfiable core [2020-12-23 06:08:26,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 5076 backedges. 0 proven. 5076 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:26,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:26,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-12-23 06:08:26,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340866716] [2020-12-23 06:08:26,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-23 06:08:26,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:26,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-23 06:08:26,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:08:26,962 INFO L87 Difference]: Start difference. First operand 299 states and 299 transitions. Second operand 40 states. [2020-12-23 06:08:27,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:27,183 INFO L93 Difference]: Finished difference Result 318 states and 318 transitions. [2020-12-23 06:08:27,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-23 06:08:27,184 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 298 [2020-12-23 06:08:27,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:27,186 INFO L225 Difference]: With dead ends: 318 [2020-12-23 06:08:27,186 INFO L226 Difference]: Without dead ends: 314 [2020-12-23 06:08:27,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 06:08:27,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-12-23 06:08:27,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 307. [2020-12-23 06:08:27,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-12-23 06:08:27,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 307 transitions. [2020-12-23 06:08:27,196 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 307 transitions. Word has length 298 [2020-12-23 06:08:27,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:27,196 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 307 transitions. [2020-12-23 06:08:27,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-23 06:08:27,197 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 307 transitions. [2020-12-23 06:08:27,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-12-23 06:08:27,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:27,199 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:27,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-23 06:08:27,413 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:27,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:27,413 INFO L82 PathProgramCache]: Analyzing trace with hash -241729065, now seen corresponding path program 37 times [2020-12-23 06:08:27,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:27,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805859947] [2020-12-23 06:08:27,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:27,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 5365 backedges. 0 proven. 5365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:28,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805859947] [2020-12-23 06:08:28,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853739601] [2020-12-23 06:08:28,584 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:28,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 1286 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-23 06:08:28,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:29,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5365 backedges. 0 proven. 5365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:29,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:29,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-12-23 06:08:29,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995120614] [2020-12-23 06:08:29,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-23 06:08:29,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:29,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-23 06:08:29,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:08:29,319 INFO L87 Difference]: Start difference. First operand 307 states and 307 transitions. Second operand 41 states. [2020-12-23 06:08:29,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:29,542 INFO L93 Difference]: Finished difference Result 326 states and 326 transitions. [2020-12-23 06:08:29,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-23 06:08:29,542 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 306 [2020-12-23 06:08:29,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:29,544 INFO L225 Difference]: With dead ends: 326 [2020-12-23 06:08:29,544 INFO L226 Difference]: Without dead ends: 322 [2020-12-23 06:08:29,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 06:08:29,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-12-23 06:08:29,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 315. [2020-12-23 06:08:29,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 315 states. [2020-12-23 06:08:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 315 transitions. [2020-12-23 06:08:29,556 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 315 transitions. Word has length 306 [2020-12-23 06:08:29,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:29,556 INFO L481 AbstractCegarLoop]: Abstraction has 315 states and 315 transitions. [2020-12-23 06:08:29,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-23 06:08:29,556 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 315 transitions. [2020-12-23 06:08:29,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2020-12-23 06:08:29,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:29,559 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:29,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 06:08:29,774 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:29,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:29,774 INFO L82 PathProgramCache]: Analyzing trace with hash -2108409278, now seen corresponding path program 38 times [2020-12-23 06:08:29,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:29,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79185513] [2020-12-23 06:08:29,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:29,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:30,995 INFO L134 CoverageAnalysis]: Checked inductivity of 5662 backedges. 0 proven. 5662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:30,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79185513] [2020-12-23 06:08:30,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101853927] [2020-12-23 06:08:30,995 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:31,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:31,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:31,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 1319 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-23 06:08:31,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:31,760 INFO L134 CoverageAnalysis]: Checked inductivity of 5662 backedges. 0 proven. 5662 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:31,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:31,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2020-12-23 06:08:31,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7209555] [2020-12-23 06:08:31,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-23 06:08:31,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:31,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-23 06:08:31,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:08:31,763 INFO L87 Difference]: Start difference. First operand 315 states and 315 transitions. Second operand 42 states. [2020-12-23 06:08:31,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:31,990 INFO L93 Difference]: Finished difference Result 334 states and 334 transitions. [2020-12-23 06:08:31,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-23 06:08:31,991 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 314 [2020-12-23 06:08:31,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:31,993 INFO L225 Difference]: With dead ends: 334 [2020-12-23 06:08:31,993 INFO L226 Difference]: Without dead ends: 330 [2020-12-23 06:08:31,995 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 314 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 06:08:31,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-12-23 06:08:32,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 323. [2020-12-23 06:08:32,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-12-23 06:08:32,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 323 transitions. [2020-12-23 06:08:32,005 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 323 transitions. Word has length 314 [2020-12-23 06:08:32,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:32,005 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 323 transitions. [2020-12-23 06:08:32,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-23 06:08:32,006 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 323 transitions. [2020-12-23 06:08:32,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2020-12-23 06:08:32,008 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:32,008 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:32,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 06:08:32,221 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:32,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:32,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1082959955, now seen corresponding path program 39 times [2020-12-23 06:08:32,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:32,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603065795] [2020-12-23 06:08:32,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:32,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:33,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5967 backedges. 0 proven. 5967 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:33,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603065795] [2020-12-23 06:08:33,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28226811] [2020-12-23 06:08:33,544 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:34,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-23 06:08:34,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:34,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 1352 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-23 06:08:34,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5967 backedges. 0 proven. 5967 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:34,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:34,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2020-12-23 06:08:34,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016903203] [2020-12-23 06:08:34,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-23 06:08:34,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:34,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-23 06:08:34,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:08:34,398 INFO L87 Difference]: Start difference. First operand 323 states and 323 transitions. Second operand 43 states. [2020-12-23 06:08:34,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:34,672 INFO L93 Difference]: Finished difference Result 342 states and 342 transitions. [2020-12-23 06:08:34,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-23 06:08:34,674 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 322 [2020-12-23 06:08:34,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:34,676 INFO L225 Difference]: With dead ends: 342 [2020-12-23 06:08:34,676 INFO L226 Difference]: Without dead ends: 338 [2020-12-23 06:08:34,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 06:08:34,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2020-12-23 06:08:34,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 331. [2020-12-23 06:08:34,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-12-23 06:08:34,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 331 transitions. [2020-12-23 06:08:34,687 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 331 transitions. Word has length 322 [2020-12-23 06:08:34,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:34,688 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 331 transitions. [2020-12-23 06:08:34,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-23 06:08:34,689 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 331 transitions. [2020-12-23 06:08:34,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2020-12-23 06:08:34,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:34,691 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:34,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 06:08:34,905 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:34,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:34,905 INFO L82 PathProgramCache]: Analyzing trace with hash 650107416, now seen corresponding path program 40 times [2020-12-23 06:08:34,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:34,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634520757] [2020-12-23 06:08:34,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6280 backedges. 0 proven. 6280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:36,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634520757] [2020-12-23 06:08:36,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469560569] [2020-12-23 06:08:36,203 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:36,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:36,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:36,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 42 conjunts are in the unsatisfiable core [2020-12-23 06:08:36,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:36,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6280 backedges. 0 proven. 6280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:36,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:36,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2020-12-23 06:08:36,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74275732] [2020-12-23 06:08:36,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-23 06:08:36,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:36,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-23 06:08:36,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:08:36,997 INFO L87 Difference]: Start difference. First operand 331 states and 331 transitions. Second operand 44 states. [2020-12-23 06:08:37,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:37,250 INFO L93 Difference]: Finished difference Result 350 states and 350 transitions. [2020-12-23 06:08:37,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-23 06:08:37,250 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 330 [2020-12-23 06:08:37,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:37,253 INFO L225 Difference]: With dead ends: 350 [2020-12-23 06:08:37,253 INFO L226 Difference]: Without dead ends: 346 [2020-12-23 06:08:37,254 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 06:08:37,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-12-23 06:08:37,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 339. [2020-12-23 06:08:37,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-12-23 06:08:37,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 339 transitions. [2020-12-23 06:08:37,263 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 339 transitions. Word has length 330 [2020-12-23 06:08:37,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:37,263 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 339 transitions. [2020-12-23 06:08:37,263 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-23 06:08:37,263 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 339 transitions. [2020-12-23 06:08:37,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2020-12-23 06:08:37,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:37,266 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:37,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:37,480 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:37,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:37,481 INFO L82 PathProgramCache]: Analyzing trace with hash 990167427, now seen corresponding path program 41 times [2020-12-23 06:08:37,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:37,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86402625] [2020-12-23 06:08:37,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6601 backedges. 0 proven. 6601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:38,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86402625] [2020-12-23 06:08:38,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121691726] [2020-12-23 06:08:38,822 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:39,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-23 06:08:39,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:39,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 1418 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-23 06:08:39,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6601 backedges. 0 proven. 6601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:39,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:39,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2020-12-23 06:08:39,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969089109] [2020-12-23 06:08:39,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-23 06:08:39,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:39,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-23 06:08:39,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:08:39,664 INFO L87 Difference]: Start difference. First operand 339 states and 339 transitions. Second operand 45 states. [2020-12-23 06:08:39,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:39,885 INFO L93 Difference]: Finished difference Result 358 states and 358 transitions. [2020-12-23 06:08:39,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-23 06:08:39,885 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 338 [2020-12-23 06:08:39,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:39,887 INFO L225 Difference]: With dead ends: 358 [2020-12-23 06:08:39,888 INFO L226 Difference]: Without dead ends: 354 [2020-12-23 06:08:39,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 06:08:39,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-12-23 06:08:39,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 347. [2020-12-23 06:08:39,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2020-12-23 06:08:39,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 347 transitions. [2020-12-23 06:08:39,897 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 347 transitions. Word has length 338 [2020-12-23 06:08:39,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:39,897 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 347 transitions. [2020-12-23 06:08:39,897 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-23 06:08:39,898 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 347 transitions. [2020-12-23 06:08:39,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-12-23 06:08:39,900 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:39,900 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:40,113 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-23 06:08:40,114 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:40,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:40,114 INFO L82 PathProgramCache]: Analyzing trace with hash -2079519250, now seen corresponding path program 42 times [2020-12-23 06:08:40,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:40,115 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789195385] [2020-12-23 06:08:40,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6930 backedges. 0 proven. 6930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:41,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789195385] [2020-12-23 06:08:41,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492973407] [2020-12-23 06:08:41,608 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:42,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-23 06:08:42,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:42,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 1451 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-23 06:08:42,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:42,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6930 backedges. 0 proven. 6930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:42,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:42,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2020-12-23 06:08:42,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849925781] [2020-12-23 06:08:42,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-23 06:08:42,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:42,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-23 06:08:42,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:08:42,600 INFO L87 Difference]: Start difference. First operand 347 states and 347 transitions. Second operand 46 states. [2020-12-23 06:08:42,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:42,808 INFO L93 Difference]: Finished difference Result 366 states and 366 transitions. [2020-12-23 06:08:42,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-12-23 06:08:42,809 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 346 [2020-12-23 06:08:42,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:42,810 INFO L225 Difference]: With dead ends: 366 [2020-12-23 06:08:42,810 INFO L226 Difference]: Without dead ends: 362 [2020-12-23 06:08:42,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 06:08:42,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-12-23 06:08:42,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 355. [2020-12-23 06:08:42,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-12-23 06:08:42,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 355 transitions. [2020-12-23 06:08:42,820 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 355 transitions. Word has length 346 [2020-12-23 06:08:42,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:42,820 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 355 transitions. [2020-12-23 06:08:42,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-23 06:08:42,821 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 355 transitions. [2020-12-23 06:08:42,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 355 [2020-12-23 06:08:42,823 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:42,823 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:43,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:43,039 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:43,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:43,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1901871271, now seen corresponding path program 43 times [2020-12-23 06:08:43,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:43,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856087631] [2020-12-23 06:08:43,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:43,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 7267 backedges. 0 proven. 7267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:44,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856087631] [2020-12-23 06:08:44,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142368454] [2020-12-23 06:08:44,587 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:44,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 1484 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-23 06:08:44,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7267 backedges. 0 proven. 7267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:45,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:45,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2020-12-23 06:08:45,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849323838] [2020-12-23 06:08:45,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-23 06:08:45,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:45,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-23 06:08:45,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:08:45,400 INFO L87 Difference]: Start difference. First operand 355 states and 355 transitions. Second operand 47 states. [2020-12-23 06:08:45,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:45,645 INFO L93 Difference]: Finished difference Result 374 states and 374 transitions. [2020-12-23 06:08:45,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-23 06:08:45,645 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 354 [2020-12-23 06:08:45,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:45,647 INFO L225 Difference]: With dead ends: 374 [2020-12-23 06:08:45,647 INFO L226 Difference]: Without dead ends: 370 [2020-12-23 06:08:45,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 354 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-12-23 06:08:45,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2020-12-23 06:08:45,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 363. [2020-12-23 06:08:45,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-12-23 06:08:45,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 363 transitions. [2020-12-23 06:08:45,656 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 363 transitions. Word has length 354 [2020-12-23 06:08:45,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:45,656 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 363 transitions. [2020-12-23 06:08:45,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-23 06:08:45,657 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 363 transitions. [2020-12-23 06:08:45,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 363 [2020-12-23 06:08:45,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:45,659 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:45,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:45,874 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:45,875 INFO L82 PathProgramCache]: Analyzing trace with hash -325855804, now seen corresponding path program 44 times [2020-12-23 06:08:45,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:45,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593587615] [2020-12-23 06:08:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:45,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:47,507 INFO L134 CoverageAnalysis]: Checked inductivity of 7612 backedges. 0 proven. 7612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:47,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593587615] [2020-12-23 06:08:47,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667953480] [2020-12-23 06:08:47,507 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:47,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:08:47,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:47,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 1517 conjuncts, 46 conjunts are in the unsatisfiable core [2020-12-23 06:08:47,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:48,349 INFO L134 CoverageAnalysis]: Checked inductivity of 7612 backedges. 0 proven. 7612 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:48,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:48,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2020-12-23 06:08:48,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574428220] [2020-12-23 06:08:48,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-23 06:08:48,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:48,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-23 06:08:48,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:08:48,351 INFO L87 Difference]: Start difference. First operand 363 states and 363 transitions. Second operand 48 states. [2020-12-23 06:08:48,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:48,593 INFO L93 Difference]: Finished difference Result 382 states and 382 transitions. [2020-12-23 06:08:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-23 06:08:48,594 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 362 [2020-12-23 06:08:48,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:48,597 INFO L225 Difference]: With dead ends: 382 [2020-12-23 06:08:48,597 INFO L226 Difference]: Without dead ends: 378 [2020-12-23 06:08:48,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 362 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-12-23 06:08:48,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-12-23 06:08:48,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 371. [2020-12-23 06:08:48,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 371 states. [2020-12-23 06:08:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 371 transitions. [2020-12-23 06:08:48,606 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 371 transitions. Word has length 362 [2020-12-23 06:08:48,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:48,606 INFO L481 AbstractCegarLoop]: Abstraction has 371 states and 371 transitions. [2020-12-23 06:08:48,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-23 06:08:48,606 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 371 transitions. [2020-12-23 06:08:48,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2020-12-23 06:08:48,609 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:48,609 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:48,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-23 06:08:48,823 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:48,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:48,823 INFO L82 PathProgramCache]: Analyzing trace with hash 883446063, now seen corresponding path program 45 times [2020-12-23 06:08:48,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:48,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467465256] [2020-12-23 06:08:48,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:48,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:50,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7965 backedges. 0 proven. 7965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:50,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467465256] [2020-12-23 06:08:50,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017729176] [2020-12-23 06:08:50,476 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:51,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-23 06:08:51,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:51,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 1550 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-23 06:08:51,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:51,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7965 backedges. 0 proven. 7965 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:51,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:51,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2020-12-23 06:08:51,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98913857] [2020-12-23 06:08:51,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-23 06:08:51,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:51,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-23 06:08:51,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:08:51,544 INFO L87 Difference]: Start difference. First operand 371 states and 371 transitions. Second operand 49 states. [2020-12-23 06:08:51,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:51,749 INFO L93 Difference]: Finished difference Result 390 states and 390 transitions. [2020-12-23 06:08:51,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-23 06:08:51,750 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 370 [2020-12-23 06:08:51,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:51,752 INFO L225 Difference]: With dead ends: 390 [2020-12-23 06:08:51,752 INFO L226 Difference]: Without dead ends: 386 [2020-12-23 06:08:51,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 417 GetRequests, 370 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-12-23 06:08:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2020-12-23 06:08:51,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 379. [2020-12-23 06:08:51,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-12-23 06:08:51,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 379 transitions. [2020-12-23 06:08:51,761 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 379 transitions. Word has length 370 [2020-12-23 06:08:51,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:51,762 INFO L481 AbstractCegarLoop]: Abstraction has 379 states and 379 transitions. [2020-12-23 06:08:51,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-23 06:08:51,762 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 379 transitions. [2020-12-23 06:08:51,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 379 [2020-12-23 06:08:51,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:51,765 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:51,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 06:08:51,979 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:51,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:51,979 INFO L82 PathProgramCache]: Analyzing trace with hash 44839322, now seen corresponding path program 46 times [2020-12-23 06:08:51,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:51,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823837946] [2020-12-23 06:08:51,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8326 backedges. 0 proven. 8326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:53,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823837946] [2020-12-23 06:08:53,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701947937] [2020-12-23 06:08:53,815 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:54,224 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:08:54,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:54,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 1583 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-23 06:08:54,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:54,733 INFO L134 CoverageAnalysis]: Checked inductivity of 8326 backedges. 0 proven. 8326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:54,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:54,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2020-12-23 06:08:54,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344704367] [2020-12-23 06:08:54,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-23 06:08:54,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:54,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-23 06:08:54,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:08:54,735 INFO L87 Difference]: Start difference. First operand 379 states and 379 transitions. Second operand 50 states. [2020-12-23 06:08:55,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:55,041 INFO L93 Difference]: Finished difference Result 398 states and 398 transitions. [2020-12-23 06:08:55,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-12-23 06:08:55,042 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 378 [2020-12-23 06:08:55,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:55,043 INFO L225 Difference]: With dead ends: 398 [2020-12-23 06:08:55,043 INFO L226 Difference]: Without dead ends: 394 [2020-12-23 06:08:55,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 378 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-12-23 06:08:55,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2020-12-23 06:08:55,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 387. [2020-12-23 06:08:55,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-12-23 06:08:55,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 387 transitions. [2020-12-23 06:08:55,053 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 387 transitions. Word has length 378 [2020-12-23 06:08:55,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:55,053 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 387 transitions. [2020-12-23 06:08:55,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-23 06:08:55,054 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 387 transitions. [2020-12-23 06:08:55,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2020-12-23 06:08:55,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:55,057 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:55,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-23 06:08:55,271 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:55,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:55,272 INFO L82 PathProgramCache]: Analyzing trace with hash -144017659, now seen corresponding path program 47 times [2020-12-23 06:08:55,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:55,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566626395] [2020-12-23 06:08:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:08:57,174 INFO L134 CoverageAnalysis]: Checked inductivity of 8695 backedges. 0 proven. 8695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:57,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566626395] [2020-12-23 06:08:57,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564621231] [2020-12-23 06:08:57,174 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:57,735 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-23 06:08:57,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:08:57,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 1616 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-23 06:08:57,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:08:58,278 INFO L134 CoverageAnalysis]: Checked inductivity of 8695 backedges. 0 proven. 8695 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:08:58,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:08:58,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2020-12-23 06:08:58,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594509783] [2020-12-23 06:08:58,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-23 06:08:58,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:08:58,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-23 06:08:58,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:08:58,281 INFO L87 Difference]: Start difference. First operand 387 states and 387 transitions. Second operand 51 states. [2020-12-23 06:08:58,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:08:58,619 INFO L93 Difference]: Finished difference Result 406 states and 406 transitions. [2020-12-23 06:08:58,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-23 06:08:58,620 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 386 [2020-12-23 06:08:58,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:08:58,622 INFO L225 Difference]: With dead ends: 406 [2020-12-23 06:08:58,622 INFO L226 Difference]: Without dead ends: 402 [2020-12-23 06:08:58,622 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 435 GetRequests, 386 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-12-23 06:08:58,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-12-23 06:08:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 395. [2020-12-23 06:08:58,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-12-23 06:08:58,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 395 transitions. [2020-12-23 06:08:58,632 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 395 transitions. Word has length 386 [2020-12-23 06:08:58,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:08:58,633 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 395 transitions. [2020-12-23 06:08:58,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-23 06:08:58,633 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 395 transitions. [2020-12-23 06:08:58,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 395 [2020-12-23 06:08:58,635 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:08:58,636 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:08:58,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:08:58,850 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:08:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:08:58,850 INFO L82 PathProgramCache]: Analyzing trace with hash -1196547728, now seen corresponding path program 48 times [2020-12-23 06:08:58,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:08:58,851 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990437518] [2020-12-23 06:08:58,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:08:58,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:00,825 INFO L134 CoverageAnalysis]: Checked inductivity of 9072 backedges. 0 proven. 9072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:00,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990437518] [2020-12-23 06:09:00,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599550493] [2020-12-23 06:09:00,826 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:01,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-23 06:09:01,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:01,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 50 conjunts are in the unsatisfiable core [2020-12-23 06:09:01,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:02,009 INFO L134 CoverageAnalysis]: Checked inductivity of 9072 backedges. 0 proven. 9072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:02,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:02,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2020-12-23 06:09:02,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692226938] [2020-12-23 06:09:02,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-23 06:09:02,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:02,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-23 06:09:02,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:09:02,011 INFO L87 Difference]: Start difference. First operand 395 states and 395 transitions. Second operand 52 states. [2020-12-23 06:09:02,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:02,276 INFO L93 Difference]: Finished difference Result 414 states and 414 transitions. [2020-12-23 06:09:02,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-23 06:09:02,277 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 394 [2020-12-23 06:09:02,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:02,279 INFO L225 Difference]: With dead ends: 414 [2020-12-23 06:09:02,279 INFO L226 Difference]: Without dead ends: 410 [2020-12-23 06:09:02,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 394 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-12-23 06:09:02,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-12-23 06:09:02,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 403. [2020-12-23 06:09:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 403 states. [2020-12-23 06:09:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 403 transitions. [2020-12-23 06:09:02,289 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 403 transitions. Word has length 394 [2020-12-23 06:09:02,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:02,289 INFO L481 AbstractCegarLoop]: Abstraction has 403 states and 403 transitions. [2020-12-23 06:09:02,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-23 06:09:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 403 transitions. [2020-12-23 06:09:02,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2020-12-23 06:09:02,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:02,292 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:02,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 06:09:02,507 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:02,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:02,507 INFO L82 PathProgramCache]: Analyzing trace with hash -247320357, now seen corresponding path program 49 times [2020-12-23 06:09:02,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:02,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007467933] [2020-12-23 06:09:02,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:04,556 INFO L134 CoverageAnalysis]: Checked inductivity of 9457 backedges. 0 proven. 9457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:04,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007467933] [2020-12-23 06:09:04,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648615704] [2020-12-23 06:09:04,557 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:04,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:05,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 1682 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-23 06:09:05,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:05,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9457 backedges. 0 proven. 9457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:05,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:05,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2020-12-23 06:09:05,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123703757] [2020-12-23 06:09:05,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-23 06:09:05,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:05,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-23 06:09:05,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:09:05,583 INFO L87 Difference]: Start difference. First operand 403 states and 403 transitions. Second operand 53 states. [2020-12-23 06:09:05,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:05,940 INFO L93 Difference]: Finished difference Result 422 states and 422 transitions. [2020-12-23 06:09:05,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-23 06:09:05,941 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 402 [2020-12-23 06:09:05,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:05,943 INFO L225 Difference]: With dead ends: 422 [2020-12-23 06:09:05,943 INFO L226 Difference]: Without dead ends: 418 [2020-12-23 06:09:05,944 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 402 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-12-23 06:09:05,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-12-23 06:09:05,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 411. [2020-12-23 06:09:05,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-12-23 06:09:05,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 411 transitions. [2020-12-23 06:09:05,952 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 411 transitions. Word has length 402 [2020-12-23 06:09:05,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:05,953 INFO L481 AbstractCegarLoop]: Abstraction has 411 states and 411 transitions. [2020-12-23 06:09:05,953 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-23 06:09:05,953 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 411 transitions. [2020-12-23 06:09:05,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-12-23 06:09:05,956 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:05,956 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:06,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 06:09:06,171 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:06,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:06,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1358013766, now seen corresponding path program 50 times [2020-12-23 06:09:06,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:06,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341174394] [2020-12-23 06:09:06,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:08,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9850 backedges. 0 proven. 9850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:08,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341174394] [2020-12-23 06:09:08,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58605108] [2020-12-23 06:09:08,395 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:08,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:09:08,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:08,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 1715 conjuncts, 52 conjunts are in the unsatisfiable core [2020-12-23 06:09:08,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:09,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9850 backedges. 0 proven. 9850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:09,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:09,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2020-12-23 06:09:09,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992097439] [2020-12-23 06:09:09,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-23 06:09:09,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:09,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-23 06:09:09,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:09:09,452 INFO L87 Difference]: Start difference. First operand 411 states and 411 transitions. Second operand 54 states. [2020-12-23 06:09:09,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:09,737 INFO L93 Difference]: Finished difference Result 430 states and 430 transitions. [2020-12-23 06:09:09,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-12-23 06:09:09,738 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 410 [2020-12-23 06:09:09,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:09,740 INFO L225 Difference]: With dead ends: 430 [2020-12-23 06:09:09,740 INFO L226 Difference]: Without dead ends: 426 [2020-12-23 06:09:09,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-12-23 06:09:09,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-12-23 06:09:09,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 419. [2020-12-23 06:09:09,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2020-12-23 06:09:09,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 419 transitions. [2020-12-23 06:09:09,750 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 419 transitions. Word has length 410 [2020-12-23 06:09:09,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:09,750 INFO L481 AbstractCegarLoop]: Abstraction has 419 states and 419 transitions. [2020-12-23 06:09:09,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-23 06:09:09,750 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 419 transitions. [2020-12-23 06:09:09,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 419 [2020-12-23 06:09:09,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:09,753 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:09,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:09,968 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:09,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:09,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1937277263, now seen corresponding path program 51 times [2020-12-23 06:09:09,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:09,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095266134] [2020-12-23 06:09:09,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:10,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:12,139 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:12,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095266134] [2020-12-23 06:09:12,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866299235] [2020-12-23 06:09:12,140 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:12,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-23 06:09:12,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:12,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 1748 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-23 06:09:12,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:13,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10251 backedges. 0 proven. 10251 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:13,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:13,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2020-12-23 06:09:13,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419565964] [2020-12-23 06:09:13,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-23 06:09:13,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:13,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-23 06:09:13,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:09:13,380 INFO L87 Difference]: Start difference. First operand 419 states and 419 transitions. Second operand 55 states. [2020-12-23 06:09:13,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:13,669 INFO L93 Difference]: Finished difference Result 438 states and 438 transitions. [2020-12-23 06:09:13,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-23 06:09:13,670 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 418 [2020-12-23 06:09:13,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:13,672 INFO L225 Difference]: With dead ends: 438 [2020-12-23 06:09:13,673 INFO L226 Difference]: Without dead ends: 434 [2020-12-23 06:09:13,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-12-23 06:09:13,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2020-12-23 06:09:13,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 427. [2020-12-23 06:09:13,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-12-23 06:09:13,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 427 transitions. [2020-12-23 06:09:13,683 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 427 transitions. Word has length 418 [2020-12-23 06:09:13,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:13,683 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 427 transitions. [2020-12-23 06:09:13,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-23 06:09:13,684 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 427 transitions. [2020-12-23 06:09:13,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 427 [2020-12-23 06:09:13,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:13,686 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:13,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-23 06:09:13,901 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:13,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:13,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1573829916, now seen corresponding path program 52 times [2020-12-23 06:09:13,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:13,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214414998] [2020-12-23 06:09:13,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:16,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10660 backedges. 0 proven. 10660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:16,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214414998] [2020-12-23 06:09:16,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818065025] [2020-12-23 06:09:16,161 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:16,635 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:09:16,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:16,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 1781 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-23 06:09:16,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 10660 backedges. 0 proven. 10660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:17,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:17,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2020-12-23 06:09:17,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453714141] [2020-12-23 06:09:17,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-23 06:09:17,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:17,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-23 06:09:17,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:09:17,227 INFO L87 Difference]: Start difference. First operand 427 states and 427 transitions. Second operand 56 states. [2020-12-23 06:09:17,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:17,475 INFO L93 Difference]: Finished difference Result 446 states and 446 transitions. [2020-12-23 06:09:17,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-12-23 06:09:17,475 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 426 [2020-12-23 06:09:17,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:17,477 INFO L225 Difference]: With dead ends: 446 [2020-12-23 06:09:17,477 INFO L226 Difference]: Without dead ends: 442 [2020-12-23 06:09:17,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 426 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-12-23 06:09:17,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2020-12-23 06:09:17,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 435. [2020-12-23 06:09:17,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 435 states. [2020-12-23 06:09:17,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 435 transitions. [2020-12-23 06:09:17,484 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 435 transitions. Word has length 426 [2020-12-23 06:09:17,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:17,485 INFO L481 AbstractCegarLoop]: Abstraction has 435 states and 435 transitions. [2020-12-23 06:09:17,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-23 06:09:17,485 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 435 transitions. [2020-12-23 06:09:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2020-12-23 06:09:17,487 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:17,487 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:17,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:17,703 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:17,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:17,704 INFO L82 PathProgramCache]: Analyzing trace with hash -2087559033, now seen corresponding path program 53 times [2020-12-23 06:09:17,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:17,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843096153] [2020-12-23 06:09:17,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:17,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:20,007 INFO L134 CoverageAnalysis]: Checked inductivity of 11077 backedges. 0 proven. 11077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:20,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843096153] [2020-12-23 06:09:20,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126833860] [2020-12-23 06:09:20,008 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:20,638 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2020-12-23 06:09:20,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:20,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 1814 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-23 06:09:20,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:21,265 INFO L134 CoverageAnalysis]: Checked inductivity of 11077 backedges. 0 proven. 11077 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:21,265 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:21,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2020-12-23 06:09:21,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034521971] [2020-12-23 06:09:21,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-23 06:09:21,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:21,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-23 06:09:21,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:09:21,268 INFO L87 Difference]: Start difference. First operand 435 states and 435 transitions. Second operand 57 states. [2020-12-23 06:09:21,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:21,582 INFO L93 Difference]: Finished difference Result 454 states and 454 transitions. [2020-12-23 06:09:21,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-23 06:09:21,583 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 434 [2020-12-23 06:09:21,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:21,584 INFO L225 Difference]: With dead ends: 454 [2020-12-23 06:09:21,584 INFO L226 Difference]: Without dead ends: 450 [2020-12-23 06:09:21,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-12-23 06:09:21,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-12-23 06:09:21,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 443. [2020-12-23 06:09:21,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 443 states. [2020-12-23 06:09:21,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 443 transitions. [2020-12-23 06:09:21,594 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 443 transitions. Word has length 434 [2020-12-23 06:09:21,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:21,594 INFO L481 AbstractCegarLoop]: Abstraction has 443 states and 443 transitions. [2020-12-23 06:09:21,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-23 06:09:21,595 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 443 transitions. [2020-12-23 06:09:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 443 [2020-12-23 06:09:21,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:21,598 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:21,812 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-23 06:09:21,813 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:21,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:21,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1046648590, now seen corresponding path program 54 times [2020-12-23 06:09:21,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:21,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202998692] [2020-12-23 06:09:21,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11502 backedges. 0 proven. 11502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:24,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202998692] [2020-12-23 06:09:24,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180692687] [2020-12-23 06:09:24,192 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:24,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-23 06:09:24,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:24,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 1847 conjuncts, 56 conjunts are in the unsatisfiable core [2020-12-23 06:09:24,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 11502 backedges. 0 proven. 11502 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:25,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:25,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2020-12-23 06:09:25,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132289719] [2020-12-23 06:09:25,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-23 06:09:25,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:25,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-23 06:09:25,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:09:25,583 INFO L87 Difference]: Start difference. First operand 443 states and 443 transitions. Second operand 58 states. [2020-12-23 06:09:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:25,912 INFO L93 Difference]: Finished difference Result 462 states and 462 transitions. [2020-12-23 06:09:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-12-23 06:09:25,913 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 442 [2020-12-23 06:09:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:25,915 INFO L225 Difference]: With dead ends: 462 [2020-12-23 06:09:25,915 INFO L226 Difference]: Without dead ends: 458 [2020-12-23 06:09:25,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-12-23 06:09:25,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-12-23 06:09:25,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 451. [2020-12-23 06:09:25,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451 states. [2020-12-23 06:09:25,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 451 transitions. [2020-12-23 06:09:25,923 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 451 transitions. Word has length 442 [2020-12-23 06:09:25,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:25,923 INFO L481 AbstractCegarLoop]: Abstraction has 451 states and 451 transitions. [2020-12-23 06:09:25,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-23 06:09:25,923 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 451 transitions. [2020-12-23 06:09:25,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 451 [2020-12-23 06:09:25,925 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:25,926 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:26,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 06:09:26,141 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:26,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:26,141 INFO L82 PathProgramCache]: Analyzing trace with hash -524626339, now seen corresponding path program 55 times [2020-12-23 06:09:26,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:26,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722271368] [2020-12-23 06:09:26,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:28,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:28,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722271368] [2020-12-23 06:09:28,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516826908] [2020-12-23 06:09:28,705 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:29,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 1880 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-23 06:09:29,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:29,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11935 backedges. 0 proven. 11935 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:29,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:29,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2020-12-23 06:09:29,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792973994] [2020-12-23 06:09:29,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-23 06:09:29,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:29,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-23 06:09:29,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:09:29,861 INFO L87 Difference]: Start difference. First operand 451 states and 451 transitions. Second operand 59 states. [2020-12-23 06:09:30,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:30,313 INFO L93 Difference]: Finished difference Result 470 states and 470 transitions. [2020-12-23 06:09:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-23 06:09:30,317 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 450 [2020-12-23 06:09:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:30,319 INFO L225 Difference]: With dead ends: 470 [2020-12-23 06:09:30,319 INFO L226 Difference]: Without dead ends: 466 [2020-12-23 06:09:30,320 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 450 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-12-23 06:09:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2020-12-23 06:09:30,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 459. [2020-12-23 06:09:30,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 459 states. [2020-12-23 06:09:30,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 459 transitions. [2020-12-23 06:09:30,326 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 459 transitions. Word has length 450 [2020-12-23 06:09:30,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:30,326 INFO L481 AbstractCegarLoop]: Abstraction has 459 states and 459 transitions. [2020-12-23 06:09:30,326 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-23 06:09:30,326 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 459 transitions. [2020-12-23 06:09:30,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 459 [2020-12-23 06:09:30,328 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:30,328 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:30,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:30,529 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:30,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:30,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1363826488, now seen corresponding path program 56 times [2020-12-23 06:09:30,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:30,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467304654] [2020-12-23 06:09:30,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:33,111 INFO L134 CoverageAnalysis]: Checked inductivity of 12376 backedges. 0 proven. 12376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:33,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467304654] [2020-12-23 06:09:33,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176432725] [2020-12-23 06:09:33,112 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:33,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:09:33,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:33,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 1913 conjuncts, 58 conjunts are in the unsatisfiable core [2020-12-23 06:09:33,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:34,281 INFO L134 CoverageAnalysis]: Checked inductivity of 12376 backedges. 0 proven. 12376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:34,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:34,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2020-12-23 06:09:34,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113561938] [2020-12-23 06:09:34,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-23 06:09:34,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:34,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-23 06:09:34,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:09:34,284 INFO L87 Difference]: Start difference. First operand 459 states and 459 transitions. Second operand 60 states. [2020-12-23 06:09:34,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:34,642 INFO L93 Difference]: Finished difference Result 478 states and 478 transitions. [2020-12-23 06:09:34,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-12-23 06:09:34,642 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 458 [2020-12-23 06:09:34,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:34,644 INFO L225 Difference]: With dead ends: 478 [2020-12-23 06:09:34,644 INFO L226 Difference]: Without dead ends: 474 [2020-12-23 06:09:34,645 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 516 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-12-23 06:09:34,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-12-23 06:09:34,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 467. [2020-12-23 06:09:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2020-12-23 06:09:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 467 transitions. [2020-12-23 06:09:34,651 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 467 transitions. Word has length 458 [2020-12-23 06:09:34,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:34,652 INFO L481 AbstractCegarLoop]: Abstraction has 467 states and 467 transitions. [2020-12-23 06:09:34,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-23 06:09:34,652 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 467 transitions. [2020-12-23 06:09:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2020-12-23 06:09:34,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:34,657 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:34,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-23 06:09:34,857 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:34,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:34,858 INFO L82 PathProgramCache]: Analyzing trace with hash -27729869, now seen corresponding path program 57 times [2020-12-23 06:09:34,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:34,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913520726] [2020-12-23 06:09:34,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:37,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12825 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:37,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913520726] [2020-12-23 06:09:37,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606314792] [2020-12-23 06:09:37,609 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:38,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2020-12-23 06:09:38,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:38,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 1946 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-23 06:09:38,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:39,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12825 backedges. 0 proven. 12825 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:39,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:39,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2020-12-23 06:09:39,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186977026] [2020-12-23 06:09:39,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-23 06:09:39,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:39,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-23 06:09:39,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:09:39,101 INFO L87 Difference]: Start difference. First operand 467 states and 467 transitions. Second operand 61 states. [2020-12-23 06:09:39,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:39,483 INFO L93 Difference]: Finished difference Result 486 states and 486 transitions. [2020-12-23 06:09:39,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-23 06:09:39,484 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 466 [2020-12-23 06:09:39,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:39,486 INFO L225 Difference]: With dead ends: 486 [2020-12-23 06:09:39,486 INFO L226 Difference]: Without dead ends: 482 [2020-12-23 06:09:39,487 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 466 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-12-23 06:09:39,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2020-12-23 06:09:39,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 475. [2020-12-23 06:09:39,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 475 states. [2020-12-23 06:09:39,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 475 transitions. [2020-12-23 06:09:39,496 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 475 transitions. Word has length 466 [2020-12-23 06:09:39,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:39,496 INFO L481 AbstractCegarLoop]: Abstraction has 475 states and 475 transitions. [2020-12-23 06:09:39,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-23 06:09:39,497 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 475 transitions. [2020-12-23 06:09:39,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2020-12-23 06:09:39,499 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:39,500 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:39,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:39,708 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:39,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:39,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1485865826, now seen corresponding path program 58 times [2020-12-23 06:09:39,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:39,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283582209] [2020-12-23 06:09:39,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:39,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13282 backedges. 0 proven. 13282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:42,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283582209] [2020-12-23 06:09:42,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352740291] [2020-12-23 06:09:42,546 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:43,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:09:43,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:43,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 1979 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-23 06:09:43,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 13282 backedges. 0 proven. 13282 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:43,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:43,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2020-12-23 06:09:43,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088029114] [2020-12-23 06:09:43,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-23 06:09:43,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:43,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-23 06:09:43,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:09:43,786 INFO L87 Difference]: Start difference. First operand 475 states and 475 transitions. Second operand 62 states. [2020-12-23 06:09:44,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:44,168 INFO L93 Difference]: Finished difference Result 494 states and 494 transitions. [2020-12-23 06:09:44,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-12-23 06:09:44,169 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 474 [2020-12-23 06:09:44,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:44,170 INFO L225 Difference]: With dead ends: 494 [2020-12-23 06:09:44,171 INFO L226 Difference]: Without dead ends: 490 [2020-12-23 06:09:44,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 474 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-12-23 06:09:44,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2020-12-23 06:09:44,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 483. [2020-12-23 06:09:44,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 483 states. [2020-12-23 06:09:44,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 483 transitions. [2020-12-23 06:09:44,178 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 483 transitions. Word has length 474 [2020-12-23 06:09:44,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:44,178 INFO L481 AbstractCegarLoop]: Abstraction has 483 states and 483 transitions. [2020-12-23 06:09:44,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-23 06:09:44,179 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 483 transitions. [2020-12-23 06:09:44,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2020-12-23 06:09:44,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:44,181 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:44,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 06:09:44,387 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:44,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:44,388 INFO L82 PathProgramCache]: Analyzing trace with hash -2033943031, now seen corresponding path program 59 times [2020-12-23 06:09:44,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:44,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381507925] [2020-12-23 06:09:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:47,293 INFO L134 CoverageAnalysis]: Checked inductivity of 13747 backedges. 0 proven. 13747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:47,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381507925] [2020-12-23 06:09:47,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895014006] [2020-12-23 06:09:47,293 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:48,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2020-12-23 06:09:48,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:48,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 2012 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-23 06:09:48,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:48,723 INFO L134 CoverageAnalysis]: Checked inductivity of 13747 backedges. 0 proven. 13747 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:48,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:48,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2020-12-23 06:09:48,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932616697] [2020-12-23 06:09:48,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-23 06:09:48,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:48,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-23 06:09:48,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:09:48,725 INFO L87 Difference]: Start difference. First operand 483 states and 483 transitions. Second operand 63 states. [2020-12-23 06:09:49,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:49,055 INFO L93 Difference]: Finished difference Result 502 states and 502 transitions. [2020-12-23 06:09:49,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-23 06:09:49,056 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 482 [2020-12-23 06:09:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:49,058 INFO L225 Difference]: With dead ends: 502 [2020-12-23 06:09:49,058 INFO L226 Difference]: Without dead ends: 498 [2020-12-23 06:09:49,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-12-23 06:09:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-12-23 06:09:49,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 491. [2020-12-23 06:09:49,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 491 states. [2020-12-23 06:09:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 491 transitions. [2020-12-23 06:09:49,066 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 491 transitions. Word has length 482 [2020-12-23 06:09:49,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:49,066 INFO L481 AbstractCegarLoop]: Abstraction has 491 states and 491 transitions. [2020-12-23 06:09:49,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-23 06:09:49,066 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 491 transitions. [2020-12-23 06:09:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-12-23 06:09:49,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:49,069 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:49,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 06:09:49,269 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:49,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:49,270 INFO L82 PathProgramCache]: Analyzing trace with hash 2116215924, now seen corresponding path program 60 times [2020-12-23 06:09:49,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:49,271 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036650225] [2020-12-23 06:09:49,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:49,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:52,346 INFO L134 CoverageAnalysis]: Checked inductivity of 14220 backedges. 0 proven. 14220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:52,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036650225] [2020-12-23 06:09:52,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796251763] [2020-12-23 06:09:52,347 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:53,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2020-12-23 06:09:53,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:09:53,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 2045 conjuncts, 62 conjunts are in the unsatisfiable core [2020-12-23 06:09:53,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:53,937 INFO L134 CoverageAnalysis]: Checked inductivity of 14220 backedges. 0 proven. 14220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:53,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:53,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2020-12-23 06:09:53,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776016324] [2020-12-23 06:09:53,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-23 06:09:53,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:53,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-23 06:09:53,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:09:53,939 INFO L87 Difference]: Start difference. First operand 491 states and 491 transitions. Second operand 64 states. [2020-12-23 06:09:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:54,361 INFO L93 Difference]: Finished difference Result 510 states and 510 transitions. [2020-12-23 06:09:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-12-23 06:09:54,361 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 490 [2020-12-23 06:09:54,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:54,363 INFO L225 Difference]: With dead ends: 510 [2020-12-23 06:09:54,363 INFO L226 Difference]: Without dead ends: 506 [2020-12-23 06:09:54,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 490 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-12-23 06:09:54,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-12-23 06:09:54,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 499. [2020-12-23 06:09:54,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 499 states. [2020-12-23 06:09:54,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 499 transitions. [2020-12-23 06:09:54,371 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 499 transitions. Word has length 490 [2020-12-23 06:09:54,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:54,371 INFO L481 AbstractCegarLoop]: Abstraction has 499 states and 499 transitions. [2020-12-23 06:09:54,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-23 06:09:54,371 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 499 transitions. [2020-12-23 06:09:54,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2020-12-23 06:09:54,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:54,374 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:54,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:54,574 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:54,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:54,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1951772639, now seen corresponding path program 61 times [2020-12-23 06:09:54,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:54,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303262735] [2020-12-23 06:09:54,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:54,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:57,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14701 backedges. 0 proven. 14701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:57,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303262735] [2020-12-23 06:09:57,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699056538] [2020-12-23 06:09:57,765 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:58,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:09:58,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 2078 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-23 06:09:58,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:09:59,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14701 backedges. 0 proven. 14701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:09:59,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:09:59,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2020-12-23 06:09:59,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729735582] [2020-12-23 06:09:59,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-23 06:09:59,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:09:59,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-23 06:09:59,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:09:59,187 INFO L87 Difference]: Start difference. First operand 499 states and 499 transitions. Second operand 65 states. [2020-12-23 06:09:59,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:09:59,607 INFO L93 Difference]: Finished difference Result 518 states and 518 transitions. [2020-12-23 06:09:59,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-23 06:09:59,607 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 498 [2020-12-23 06:09:59,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:09:59,609 INFO L225 Difference]: With dead ends: 518 [2020-12-23 06:09:59,609 INFO L226 Difference]: Without dead ends: 514 [2020-12-23 06:09:59,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 498 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-12-23 06:09:59,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2020-12-23 06:09:59,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 507. [2020-12-23 06:09:59,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 507 states. [2020-12-23 06:09:59,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 507 transitions. [2020-12-23 06:09:59,616 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 507 transitions. Word has length 498 [2020-12-23 06:09:59,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:09:59,617 INFO L481 AbstractCegarLoop]: Abstraction has 507 states and 507 transitions. [2020-12-23 06:09:59,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-23 06:09:59,617 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 507 transitions. [2020-12-23 06:09:59,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2020-12-23 06:09:59,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:09:59,619 INFO L422 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:09:59,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:09:59,820 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:09:59,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:09:59,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1428676682, now seen corresponding path program 62 times [2020-12-23 06:09:59,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:09:59,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810624671] [2020-12-23 06:09:59,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:09:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:03,145 INFO L134 CoverageAnalysis]: Checked inductivity of 15190 backedges. 0 proven. 15190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:03,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810624671] [2020-12-23 06:10:03,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447178504] [2020-12-23 06:10:03,146 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:03,680 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:10:03,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:03,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 2111 conjuncts, 64 conjunts are in the unsatisfiable core [2020-12-23 06:10:03,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:04,474 INFO L134 CoverageAnalysis]: Checked inductivity of 15190 backedges. 0 proven. 15190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:04,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:04,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2020-12-23 06:10:04,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076036702] [2020-12-23 06:10:04,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-23 06:10:04,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:04,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-23 06:10:04,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:10:04,476 INFO L87 Difference]: Start difference. First operand 507 states and 507 transitions. Second operand 66 states. [2020-12-23 06:10:04,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:04,960 INFO L93 Difference]: Finished difference Result 526 states and 526 transitions. [2020-12-23 06:10:04,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-12-23 06:10:04,961 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 506 [2020-12-23 06:10:04,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:04,963 INFO L225 Difference]: With dead ends: 526 [2020-12-23 06:10:04,964 INFO L226 Difference]: Without dead ends: 522 [2020-12-23 06:10:04,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 570 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-12-23 06:10:04,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-12-23 06:10:04,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 515. [2020-12-23 06:10:04,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 515 states. [2020-12-23 06:10:04,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 515 transitions. [2020-12-23 06:10:04,971 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 515 transitions. Word has length 506 [2020-12-23 06:10:04,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:04,971 INFO L481 AbstractCegarLoop]: Abstraction has 515 states and 515 transitions. [2020-12-23 06:10:04,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-23 06:10:04,971 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 515 transitions. [2020-12-23 06:10:04,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 515 [2020-12-23 06:10:04,973 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:04,974 INFO L422 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:05,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:05,174 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:05,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:05,177 INFO L82 PathProgramCache]: Analyzing trace with hash 291796405, now seen corresponding path program 63 times [2020-12-23 06:10:05,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:05,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628296306] [2020-12-23 06:10:05,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:08,573 INFO L134 CoverageAnalysis]: Checked inductivity of 15687 backedges. 0 proven. 15687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:08,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628296306] [2020-12-23 06:10:08,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049910940] [2020-12-23 06:10:08,574 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:09,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2020-12-23 06:10:09,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:09,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 2144 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-23 06:10:09,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:10,184 INFO L134 CoverageAnalysis]: Checked inductivity of 15687 backedges. 0 proven. 15687 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:10,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:10,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2020-12-23 06:10:10,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716124330] [2020-12-23 06:10:10,185 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-23 06:10:10,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:10,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-23 06:10:10,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:10:10,187 INFO L87 Difference]: Start difference. First operand 515 states and 515 transitions. Second operand 67 states. [2020-12-23 06:10:10,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:10,625 INFO L93 Difference]: Finished difference Result 534 states and 534 transitions. [2020-12-23 06:10:10,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-23 06:10:10,626 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 514 [2020-12-23 06:10:10,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:10,628 INFO L225 Difference]: With dead ends: 534 [2020-12-23 06:10:10,628 INFO L226 Difference]: Without dead ends: 530 [2020-12-23 06:10:10,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 514 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-12-23 06:10:10,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-12-23 06:10:10,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 523. [2020-12-23 06:10:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2020-12-23 06:10:10,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 523 transitions. [2020-12-23 06:10:10,638 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 523 transitions. Word has length 514 [2020-12-23 06:10:10,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:10,638 INFO L481 AbstractCegarLoop]: Abstraction has 523 states and 523 transitions. [2020-12-23 06:10:10,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-23 06:10:10,639 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 523 transitions. [2020-12-23 06:10:10,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 523 [2020-12-23 06:10:10,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:10,642 INFO L422 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:10,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:10,856 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:10,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:10,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1630113760, now seen corresponding path program 64 times [2020-12-23 06:10:10,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:10,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558035414] [2020-12-23 06:10:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:10,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:14,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16192 backedges. 0 proven. 16192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:14,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558035414] [2020-12-23 06:10:14,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604951306] [2020-12-23 06:10:14,318 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:14,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:10:14,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:14,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 2177 conjuncts, 66 conjunts are in the unsatisfiable core [2020-12-23 06:10:14,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:15,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16192 backedges. 0 proven. 16192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:15,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:15,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2020-12-23 06:10:15,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707637455] [2020-12-23 06:10:15,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-23 06:10:15,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:15,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-23 06:10:15,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:10:15,757 INFO L87 Difference]: Start difference. First operand 523 states and 523 transitions. Second operand 68 states. [2020-12-23 06:10:16,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:16,209 INFO L93 Difference]: Finished difference Result 542 states and 542 transitions. [2020-12-23 06:10:16,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-23 06:10:16,210 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 522 [2020-12-23 06:10:16,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:16,213 INFO L225 Difference]: With dead ends: 542 [2020-12-23 06:10:16,213 INFO L226 Difference]: Without dead ends: 538 [2020-12-23 06:10:16,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 588 GetRequests, 522 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-12-23 06:10:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2020-12-23 06:10:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 531. [2020-12-23 06:10:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 531 states. [2020-12-23 06:10:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 531 transitions. [2020-12-23 06:10:16,221 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 531 transitions. Word has length 522 [2020-12-23 06:10:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:16,221 INFO L481 AbstractCegarLoop]: Abstraction has 531 states and 531 transitions. [2020-12-23 06:10:16,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-23 06:10:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 531 transitions. [2020-12-23 06:10:16,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 531 [2020-12-23 06:10:16,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:16,224 INFO L422 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:16,432 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:16,433 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:16,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:16,434 INFO L82 PathProgramCache]: Analyzing trace with hash -129446005, now seen corresponding path program 65 times [2020-12-23 06:10:16,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:16,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407984172] [2020-12-23 06:10:16,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16705 backedges. 0 proven. 16705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:19,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407984172] [2020-12-23 06:10:19,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271963860] [2020-12-23 06:10:19,980 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:20,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-12-23 06:10:20,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:20,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 2210 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-23 06:10:20,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:21,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16705 backedges. 0 proven. 16705 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:21,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:21,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2020-12-23 06:10:21,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969134191] [2020-12-23 06:10:21,678 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-23 06:10:21,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:21,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-23 06:10:21,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:10:21,679 INFO L87 Difference]: Start difference. First operand 531 states and 531 transitions. Second operand 69 states. [2020-12-23 06:10:22,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:22,099 INFO L93 Difference]: Finished difference Result 550 states and 550 transitions. [2020-12-23 06:10:22,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-23 06:10:22,100 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 530 [2020-12-23 06:10:22,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:22,102 INFO L225 Difference]: With dead ends: 550 [2020-12-23 06:10:22,102 INFO L226 Difference]: Without dead ends: 546 [2020-12-23 06:10:22,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 530 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-12-23 06:10:22,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-12-23 06:10:22,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 539. [2020-12-23 06:10:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 539 states. [2020-12-23 06:10:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 539 transitions. [2020-12-23 06:10:22,110 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 539 transitions. Word has length 530 [2020-12-23 06:10:22,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:22,111 INFO L481 AbstractCegarLoop]: Abstraction has 539 states and 539 transitions. [2020-12-23 06:10:22,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-23 06:10:22,111 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 539 transitions. [2020-12-23 06:10:22,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 539 [2020-12-23 06:10:22,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:22,113 INFO L422 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:22,314 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-23 06:10:22,314 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:22,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:22,330 INFO L82 PathProgramCache]: Analyzing trace with hash 495358966, now seen corresponding path program 66 times [2020-12-23 06:10:22,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:22,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135706124] [2020-12-23 06:10:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:22,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:26,211 INFO L134 CoverageAnalysis]: Checked inductivity of 17226 backedges. 0 proven. 17226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:26,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135706124] [2020-12-23 06:10:26,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057271241] [2020-12-23 06:10:26,212 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:27,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2020-12-23 06:10:27,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:27,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 2243 conjuncts, 68 conjunts are in the unsatisfiable core [2020-12-23 06:10:27,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 17226 backedges. 0 proven. 17226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:28,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:28,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2020-12-23 06:10:28,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422644847] [2020-12-23 06:10:28,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-23 06:10:28,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:28,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-23 06:10:28,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:10:28,011 INFO L87 Difference]: Start difference. First operand 539 states and 539 transitions. Second operand 70 states. [2020-12-23 06:10:28,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:28,519 INFO L93 Difference]: Finished difference Result 558 states and 558 transitions. [2020-12-23 06:10:28,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-12-23 06:10:28,520 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 538 [2020-12-23 06:10:28,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:28,522 INFO L225 Difference]: With dead ends: 558 [2020-12-23 06:10:28,522 INFO L226 Difference]: Without dead ends: 554 [2020-12-23 06:10:28,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-12-23 06:10:28,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-12-23 06:10:28,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 547. [2020-12-23 06:10:28,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 547 states. [2020-12-23 06:10:28,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 547 states to 547 states and 547 transitions. [2020-12-23 06:10:28,530 INFO L78 Accepts]: Start accepts. Automaton has 547 states and 547 transitions. Word has length 538 [2020-12-23 06:10:28,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:28,530 INFO L481 AbstractCegarLoop]: Abstraction has 547 states and 547 transitions. [2020-12-23 06:10:28,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-23 06:10:28,531 INFO L276 IsEmpty]: Start isEmpty. Operand 547 states and 547 transitions. [2020-12-23 06:10:28,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 547 [2020-12-23 06:10:28,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:28,533 INFO L422 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:28,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 06:10:28,745 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:28,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:28,746 INFO L82 PathProgramCache]: Analyzing trace with hash 324713825, now seen corresponding path program 67 times [2020-12-23 06:10:28,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:28,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930872338] [2020-12-23 06:10:28,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:32,653 INFO L134 CoverageAnalysis]: Checked inductivity of 17755 backedges. 0 proven. 17755 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:32,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930872338] [2020-12-23 06:10:32,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63329330] [2020-12-23 06:10:32,654 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:33,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 2276 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-23 06:10:33,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 17755 backedges. 0 proven. 17755 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:34,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:34,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2020-12-23 06:10:34,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204651945] [2020-12-23 06:10:34,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-23 06:10:34,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:34,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-23 06:10:34,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:10:34,112 INFO L87 Difference]: Start difference. First operand 547 states and 547 transitions. Second operand 71 states. [2020-12-23 06:10:34,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:34,534 INFO L93 Difference]: Finished difference Result 566 states and 566 transitions. [2020-12-23 06:10:34,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-23 06:10:34,535 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 546 [2020-12-23 06:10:34,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:34,538 INFO L225 Difference]: With dead ends: 566 [2020-12-23 06:10:34,538 INFO L226 Difference]: Without dead ends: 562 [2020-12-23 06:10:34,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-12-23 06:10:34,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2020-12-23 06:10:34,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 555. [2020-12-23 06:10:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 555 states. [2020-12-23 06:10:34,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 555 transitions. [2020-12-23 06:10:34,546 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 555 transitions. Word has length 546 [2020-12-23 06:10:34,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:34,546 INFO L481 AbstractCegarLoop]: Abstraction has 555 states and 555 transitions. [2020-12-23 06:10:34,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-23 06:10:34,546 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 555 transitions. [2020-12-23 06:10:34,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2020-12-23 06:10:34,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:34,549 INFO L422 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:34,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:34,750 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:34,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:34,751 INFO L82 PathProgramCache]: Analyzing trace with hash -477082676, now seen corresponding path program 68 times [2020-12-23 06:10:34,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:34,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010403320] [2020-12-23 06:10:34,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:38,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18292 backedges. 0 proven. 18292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:38,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010403320] [2020-12-23 06:10:38,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307047289] [2020-12-23 06:10:38,750 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:39,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:10:39,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:39,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 2309 conjuncts, 70 conjunts are in the unsatisfiable core [2020-12-23 06:10:39,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 18292 backedges. 0 proven. 18292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:40,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:40,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2020-12-23 06:10:40,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804777953] [2020-12-23 06:10:40,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-23 06:10:40,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:40,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-23 06:10:40,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:10:40,251 INFO L87 Difference]: Start difference. First operand 555 states and 555 transitions. Second operand 72 states. [2020-12-23 06:10:40,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:40,862 INFO L93 Difference]: Finished difference Result 574 states and 574 transitions. [2020-12-23 06:10:40,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-12-23 06:10:40,863 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 554 [2020-12-23 06:10:40,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:40,865 INFO L225 Difference]: With dead ends: 574 [2020-12-23 06:10:40,865 INFO L226 Difference]: Without dead ends: 570 [2020-12-23 06:10:40,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 554 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-12-23 06:10:40,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2020-12-23 06:10:40,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 563. [2020-12-23 06:10:40,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 563 states. [2020-12-23 06:10:40,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 563 transitions. [2020-12-23 06:10:40,873 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 563 transitions. Word has length 554 [2020-12-23 06:10:40,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:40,873 INFO L481 AbstractCegarLoop]: Abstraction has 563 states and 563 transitions. [2020-12-23 06:10:40,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-12-23 06:10:40,873 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 563 transitions. [2020-12-23 06:10:40,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2020-12-23 06:10:40,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:40,876 INFO L422 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:41,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 06:10:41,077 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:41,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1661845705, now seen corresponding path program 69 times [2020-12-23 06:10:41,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:41,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137955033] [2020-12-23 06:10:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:41,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:45,153 INFO L134 CoverageAnalysis]: Checked inductivity of 18837 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:45,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137955033] [2020-12-23 06:10:45,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54726849] [2020-12-23 06:10:45,154 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:46,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2020-12-23 06:10:46,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:46,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 2342 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-23 06:10:46,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:47,004 INFO L134 CoverageAnalysis]: Checked inductivity of 18837 backedges. 0 proven. 18837 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:47,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:47,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2020-12-23 06:10:47,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737015460] [2020-12-23 06:10:47,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-12-23 06:10:47,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:47,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-12-23 06:10:47,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:10:47,007 INFO L87 Difference]: Start difference. First operand 563 states and 563 transitions. Second operand 73 states. [2020-12-23 06:10:47,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:47,583 INFO L93 Difference]: Finished difference Result 582 states and 582 transitions. [2020-12-23 06:10:47,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-23 06:10:47,583 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 562 [2020-12-23 06:10:47,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:47,586 INFO L225 Difference]: With dead ends: 582 [2020-12-23 06:10:47,586 INFO L226 Difference]: Without dead ends: 578 [2020-12-23 06:10:47,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 633 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-12-23 06:10:47,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2020-12-23 06:10:47,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 571. [2020-12-23 06:10:47,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 571 states. [2020-12-23 06:10:47,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 571 transitions. [2020-12-23 06:10:47,594 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 571 transitions. Word has length 562 [2020-12-23 06:10:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:47,594 INFO L481 AbstractCegarLoop]: Abstraction has 571 states and 571 transitions. [2020-12-23 06:10:47,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-12-23 06:10:47,594 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 571 transitions. [2020-12-23 06:10:47,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2020-12-23 06:10:47,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:47,597 INFO L422 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:47,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-23 06:10:47,798 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:47,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:47,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1397462946, now seen corresponding path program 70 times [2020-12-23 06:10:47,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:47,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915627935] [2020-12-23 06:10:47,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:47,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:51,978 INFO L134 CoverageAnalysis]: Checked inductivity of 19390 backedges. 0 proven. 19390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:51,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915627935] [2020-12-23 06:10:51,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91882510] [2020-12-23 06:10:51,979 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:52,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:10:52,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:52,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 2375 conjuncts, 72 conjunts are in the unsatisfiable core [2020-12-23 06:10:52,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:10:53,521 INFO L134 CoverageAnalysis]: Checked inductivity of 19390 backedges. 0 proven. 19390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:53,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:10:53,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2020-12-23 06:10:53,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911124020] [2020-12-23 06:10:53,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-12-23 06:10:53,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:10:53,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-12-23 06:10:53,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:10:53,523 INFO L87 Difference]: Start difference. First operand 571 states and 571 transitions. Second operand 74 states. [2020-12-23 06:10:54,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:10:54,119 INFO L93 Difference]: Finished difference Result 590 states and 590 transitions. [2020-12-23 06:10:54,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-12-23 06:10:54,120 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 570 [2020-12-23 06:10:54,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:10:54,122 INFO L225 Difference]: With dead ends: 590 [2020-12-23 06:10:54,122 INFO L226 Difference]: Without dead ends: 586 [2020-12-23 06:10:54,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-12-23 06:10:54,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2020-12-23 06:10:54,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 579. [2020-12-23 06:10:54,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 579 states. [2020-12-23 06:10:54,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 579 states to 579 states and 579 transitions. [2020-12-23 06:10:54,132 INFO L78 Accepts]: Start accepts. Automaton has 579 states and 579 transitions. Word has length 570 [2020-12-23 06:10:54,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:10:54,132 INFO L481 AbstractCegarLoop]: Abstraction has 579 states and 579 transitions. [2020-12-23 06:10:54,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-12-23 06:10:54,132 INFO L276 IsEmpty]: Start isEmpty. Operand 579 states and 579 transitions. [2020-12-23 06:10:54,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2020-12-23 06:10:54,135 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:10:54,135 INFO L422 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:10:54,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-12-23 06:10:54,336 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:10:54,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:10:54,337 INFO L82 PathProgramCache]: Analyzing trace with hash 526865677, now seen corresponding path program 71 times [2020-12-23 06:10:54,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:10:54,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768131943] [2020-12-23 06:10:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:10:54,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:10:58,643 INFO L134 CoverageAnalysis]: Checked inductivity of 19951 backedges. 0 proven. 19951 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:10:58,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768131943] [2020-12-23 06:10:58,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588154761] [2020-12-23 06:10:58,644 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:10:59,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2020-12-23 06:10:59,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:10:59,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 2408 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-23 06:10:59,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:11:00,508 INFO L134 CoverageAnalysis]: Checked inductivity of 19951 backedges. 0 proven. 19951 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:00,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:11:00,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2020-12-23 06:11:00,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053313644] [2020-12-23 06:11:00,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-12-23 06:11:00,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:00,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-12-23 06:11:00,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:11:00,511 INFO L87 Difference]: Start difference. First operand 579 states and 579 transitions. Second operand 75 states. [2020-12-23 06:11:01,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:01,125 INFO L93 Difference]: Finished difference Result 598 states and 598 transitions. [2020-12-23 06:11:01,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-23 06:11:01,125 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 578 [2020-12-23 06:11:01,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:01,128 INFO L225 Difference]: With dead ends: 598 [2020-12-23 06:11:01,128 INFO L226 Difference]: Without dead ends: 594 [2020-12-23 06:11:01,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 651 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-12-23 06:11:01,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2020-12-23 06:11:01,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 587. [2020-12-23 06:11:01,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 587 states. [2020-12-23 06:11:01,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 587 transitions. [2020-12-23 06:11:01,135 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 587 transitions. Word has length 578 [2020-12-23 06:11:01,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:01,136 INFO L481 AbstractCegarLoop]: Abstraction has 587 states and 587 transitions. [2020-12-23 06:11:01,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-12-23 06:11:01,136 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 587 transitions. [2020-12-23 06:11:01,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2020-12-23 06:11:01,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:01,139 INFO L422 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:01,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:01,340 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:01,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:01,341 INFO L82 PathProgramCache]: Analyzing trace with hash 521172856, now seen corresponding path program 72 times [2020-12-23 06:11:01,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:01,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064895540] [2020-12-23 06:11:01,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:01,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:05,825 INFO L134 CoverageAnalysis]: Checked inductivity of 20520 backedges. 0 proven. 20520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:05,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064895540] [2020-12-23 06:11:05,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723377283] [2020-12-23 06:11:05,825 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:06,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2020-12-23 06:11:06,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:11:06,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 2441 conjuncts, 74 conjunts are in the unsatisfiable core [2020-12-23 06:11:06,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:11:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20520 backedges. 0 proven. 20520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:07,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:11:07,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2020-12-23 06:11:07,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310703285] [2020-12-23 06:11:07,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-12-23 06:11:07,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:07,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-12-23 06:11:07,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:11:07,908 INFO L87 Difference]: Start difference. First operand 587 states and 587 transitions. Second operand 76 states. [2020-12-23 06:11:08,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:08,572 INFO L93 Difference]: Finished difference Result 606 states and 606 transitions. [2020-12-23 06:11:08,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-12-23 06:11:08,573 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 586 [2020-12-23 06:11:08,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:08,581 INFO L225 Difference]: With dead ends: 606 [2020-12-23 06:11:08,581 INFO L226 Difference]: Without dead ends: 602 [2020-12-23 06:11:08,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 660 GetRequests, 586 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-12-23 06:11:08,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2020-12-23 06:11:08,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 595. [2020-12-23 06:11:08,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 595 states. [2020-12-23 06:11:08,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 595 transitions. [2020-12-23 06:11:08,592 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 595 transitions. Word has length 586 [2020-12-23 06:11:08,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:08,592 INFO L481 AbstractCegarLoop]: Abstraction has 595 states and 595 transitions. [2020-12-23 06:11:08,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-12-23 06:11:08,592 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 595 transitions. [2020-12-23 06:11:08,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 595 [2020-12-23 06:11:08,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:08,595 INFO L422 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:08,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:08,797 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:08,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:08,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1964113635, now seen corresponding path program 73 times [2020-12-23 06:11:08,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:08,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102193665] [2020-12-23 06:11:08,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 21097 backedges. 0 proven. 21097 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:13,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102193665] [2020-12-23 06:11:13,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906857777] [2020-12-23 06:11:13,333 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:13,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:13,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 2474 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-23 06:11:13,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:11:14,944 INFO L134 CoverageAnalysis]: Checked inductivity of 21097 backedges. 0 proven. 21097 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:14,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:11:14,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2020-12-23 06:11:14,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813098575] [2020-12-23 06:11:14,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-12-23 06:11:14,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:14,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-12-23 06:11:14,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:11:14,947 INFO L87 Difference]: Start difference. First operand 595 states and 595 transitions. Second operand 77 states. [2020-12-23 06:11:15,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:15,405 INFO L93 Difference]: Finished difference Result 614 states and 614 transitions. [2020-12-23 06:11:15,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-23 06:11:15,406 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 594 [2020-12-23 06:11:15,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:15,409 INFO L225 Difference]: With dead ends: 614 [2020-12-23 06:11:15,409 INFO L226 Difference]: Without dead ends: 610 [2020-12-23 06:11:15,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 669 GetRequests, 594 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-12-23 06:11:15,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-12-23 06:11:15,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 603. [2020-12-23 06:11:15,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 603 states. [2020-12-23 06:11:15,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 603 transitions. [2020-12-23 06:11:15,417 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 603 transitions. Word has length 594 [2020-12-23 06:11:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:15,418 INFO L481 AbstractCegarLoop]: Abstraction has 603 states and 603 transitions. [2020-12-23 06:11:15,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-12-23 06:11:15,418 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 603 transitions. [2020-12-23 06:11:15,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2020-12-23 06:11:15,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:15,421 INFO L422 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:15,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:15,622 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:15,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:15,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1228335950, now seen corresponding path program 74 times [2020-12-23 06:11:15,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:15,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517213570] [2020-12-23 06:11:15,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:20,318 INFO L134 CoverageAnalysis]: Checked inductivity of 21682 backedges. 0 proven. 21682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:20,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517213570] [2020-12-23 06:11:20,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7667834] [2020-12-23 06:11:20,319 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:20,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 06:11:20,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:11:20,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 2507 conjuncts, 76 conjunts are in the unsatisfiable core [2020-12-23 06:11:20,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:11:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 21682 backedges. 0 proven. 21682 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:21,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:11:21,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2020-12-23 06:11:21,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438672869] [2020-12-23 06:11:21,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-12-23 06:11:21,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:21,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-12-23 06:11:21,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 06:11:21,887 INFO L87 Difference]: Start difference. First operand 603 states and 603 transitions. Second operand 78 states. [2020-12-23 06:11:22,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:22,467 INFO L93 Difference]: Finished difference Result 622 states and 622 transitions. [2020-12-23 06:11:22,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-12-23 06:11:22,468 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 602 [2020-12-23 06:11:22,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:22,471 INFO L225 Difference]: With dead ends: 622 [2020-12-23 06:11:22,471 INFO L226 Difference]: Without dead ends: 618 [2020-12-23 06:11:22,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-12-23 06:11:22,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2020-12-23 06:11:22,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 611. [2020-12-23 06:11:22,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 611 states. [2020-12-23 06:11:22,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 611 states to 611 states and 611 transitions. [2020-12-23 06:11:22,479 INFO L78 Accepts]: Start accepts. Automaton has 611 states and 611 transitions. Word has length 602 [2020-12-23 06:11:22,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:22,479 INFO L481 AbstractCegarLoop]: Abstraction has 611 states and 611 transitions. [2020-12-23 06:11:22,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-12-23 06:11:22,479 INFO L276 IsEmpty]: Start isEmpty. Operand 611 states and 611 transitions. [2020-12-23 06:11:22,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 611 [2020-12-23 06:11:22,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:22,482 INFO L422 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:22,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-23 06:11:22,683 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:22,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:22,684 INFO L82 PathProgramCache]: Analyzing trace with hash -934658887, now seen corresponding path program 75 times [2020-12-23 06:11:22,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:22,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092566942] [2020-12-23 06:11:22,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:22,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:27,455 INFO L134 CoverageAnalysis]: Checked inductivity of 22275 backedges. 0 proven. 22275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:27,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092566942] [2020-12-23 06:11:27,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361004132] [2020-12-23 06:11:27,455 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:28,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2020-12-23 06:11:28,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:11:28,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 2540 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-23 06:11:28,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:11:29,503 INFO L134 CoverageAnalysis]: Checked inductivity of 22275 backedges. 0 proven. 22275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:29,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:11:29,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2020-12-23 06:11:29,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563368837] [2020-12-23 06:11:29,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-12-23 06:11:29,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:29,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-12-23 06:11:29,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 06:11:29,505 INFO L87 Difference]: Start difference. First operand 611 states and 611 transitions. Second operand 79 states. [2020-12-23 06:11:30,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:30,017 INFO L93 Difference]: Finished difference Result 630 states and 630 transitions. [2020-12-23 06:11:30,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-23 06:11:30,018 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 610 [2020-12-23 06:11:30,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:30,021 INFO L225 Difference]: With dead ends: 630 [2020-12-23 06:11:30,021 INFO L226 Difference]: Without dead ends: 626 [2020-12-23 06:11:30,022 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 687 GetRequests, 610 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-12-23 06:11:30,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 626 states. [2020-12-23 06:11:30,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 626 to 619. [2020-12-23 06:11:30,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 619 states. [2020-12-23 06:11:30,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 619 states to 619 states and 619 transitions. [2020-12-23 06:11:30,030 INFO L78 Accepts]: Start accepts. Automaton has 619 states and 619 transitions. Word has length 610 [2020-12-23 06:11:30,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:30,030 INFO L481 AbstractCegarLoop]: Abstraction has 619 states and 619 transitions. [2020-12-23 06:11:30,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-12-23 06:11:30,030 INFO L276 IsEmpty]: Start isEmpty. Operand 619 states and 619 transitions. [2020-12-23 06:11:30,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 619 [2020-12-23 06:11:30,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:30,033 INFO L422 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:30,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:30,234 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:30,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:30,235 INFO L82 PathProgramCache]: Analyzing trace with hash 605483812, now seen corresponding path program 76 times [2020-12-23 06:11:30,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:30,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697341081] [2020-12-23 06:11:30,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:30,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 06:11:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 22876 backedges. 0 proven. 22876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:35,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697341081] [2020-12-23 06:11:35,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938963141] [2020-12-23 06:11:35,209 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:35,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 06:11:35,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 06:11:35,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 2573 conjuncts, 78 conjunts are in the unsatisfiable core [2020-12-23 06:11:35,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 06:11:36,841 INFO L134 CoverageAnalysis]: Checked inductivity of 22876 backedges. 0 proven. 22876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 06:11:36,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 06:11:36,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2020-12-23 06:11:36,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960801541] [2020-12-23 06:11:36,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-12-23 06:11:36,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 06:11:36,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-12-23 06:11:36,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:11:36,844 INFO L87 Difference]: Start difference. First operand 619 states and 619 transitions. Second operand 80 states. [2020-12-23 06:11:37,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 06:11:37,427 INFO L93 Difference]: Finished difference Result 638 states and 638 transitions. [2020-12-23 06:11:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-12-23 06:11:37,428 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 618 [2020-12-23 06:11:37,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 06:11:37,430 INFO L225 Difference]: With dead ends: 638 [2020-12-23 06:11:37,430 INFO L226 Difference]: Without dead ends: 634 [2020-12-23 06:11:37,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 696 GetRequests, 618 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-12-23 06:11:37,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2020-12-23 06:11:37,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 627. [2020-12-23 06:11:37,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2020-12-23 06:11:37,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 627 transitions. [2020-12-23 06:11:37,439 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 627 transitions. Word has length 618 [2020-12-23 06:11:37,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 06:11:37,439 INFO L481 AbstractCegarLoop]: Abstraction has 627 states and 627 transitions. [2020-12-23 06:11:37,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-12-23 06:11:37,439 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 627 transitions. [2020-12-23 06:11:37,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 627 [2020-12-23 06:11:37,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 06:11:37,443 INFO L422 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 06:11:37,644 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 06:11:37,645 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 06:11:37,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 06:11:37,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1821897073, now seen corresponding path program 77 times [2020-12-23 06:11:37,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 06:11:37,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623851875] [2020-12-23 06:11:37,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 06:11:37,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat