/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/verifythis/tree_max.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:04:56,853 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:04:56,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:04:56,917 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 07:04:56,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 07:04:56,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 07:04:56,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 07:04:56,934 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 07:04:56,937 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 07:04:56,942 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 07:04:56,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 07:04:56,948 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 07:04:56,949 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:04:56,952 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:04:56,954 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:04:56,956 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:04:56,958 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:04:56,961 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:04:56,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:04:56,975 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:04:56,977 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:04:56,979 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:04:56,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:04:56,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:04:56,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:04:57,001 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 07:04:57,002 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 07:04:57,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 07:04:57,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 07:04:57,022 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 07:04:57,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 07:04:57,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 07:04:57,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 07:04:57,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 07:04:57,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 07:04:57,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 07:04:57,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:04:57,083 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:04:57,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:04:57,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:04:57,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:04:57,086 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:04:57,086 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:04:57,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:04:57,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:04:57,087 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:04:57,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:04:57,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:04:57,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:04:57,088 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:04:57,088 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:04:57,088 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:04:57,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:04:57,089 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:04:57,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:04:57,089 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:04:57,089 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:04:57,089 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:04:57,090 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:04:57,090 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:04:57,090 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:04:57,090 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:04:57,091 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:04:57,483 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:04:57,532 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:04:57,536 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:04:57,537 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:04:57,538 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:04:57,539 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/verifythis/tree_max.c [2020-12-22 07:04:57,614 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b261bd29/0cffdfbd2d154599a763e7d049aef5bb/FLAG6a8942dc4 [2020-12-22 07:04:58,339 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:04:58,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c [2020-12-22 07:04:58,349 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b261bd29/0cffdfbd2d154599a763e7d049aef5bb/FLAG6a8942dc4 [2020-12-22 07:04:58,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b261bd29/0cffdfbd2d154599a763e7d049aef5bb [2020-12-22 07:04:58,669 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:04:58,672 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:04:58,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:04:58,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:04:58,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:04:58,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:04:58" (1/1) ... [2020-12-22 07:04:58,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10c94025 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:58, skipping insertion in model container [2020-12-22 07:04:58,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:04:58" (1/1) ... [2020-12-22 07:04:58,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:04:58,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:04:58,955 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2020-12-22 07:04:58,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:04:59,011 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:04:59,034 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/verifythis/tree_max.c[544,557] [2020-12-22 07:04:59,062 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:04:59,090 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:04:59,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:59 WrapperNode [2020-12-22 07:04:59,091 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:04:59,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:04:59,093 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:04:59,093 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:04:59,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:59" (1/1) ... [2020-12-22 07:04:59,130 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:59" (1/1) ... [2020-12-22 07:04:59,160 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:04:59,163 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:04:59,163 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:04:59,163 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:04:59,177 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:59" (1/1) ... [2020-12-22 07:04:59,177 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:59" (1/1) ... [2020-12-22 07:04:59,185 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:59" (1/1) ... [2020-12-22 07:04:59,185 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:59" (1/1) ... [2020-12-22 07:04:59,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:59" (1/1) ... [2020-12-22 07:04:59,213 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:59" (1/1) ... [2020-12-22 07:04:59,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:59" (1/1) ... [2020-12-22 07:04:59,228 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:04:59,229 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:04:59,230 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:04:59,230 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:04:59,231 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:59" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:04:59,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 07:04:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure max [2020-12-22 07:04:59,360 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2020-12-22 07:04:59,360 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_tree [2020-12-22 07:04:59,360 INFO L138 BoogieDeclarations]: Found implementation of procedure nondet_tree [2020-12-22 07:04:59,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:04:59,361 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-12-22 07:04:59,361 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-12-22 07:04:59,361 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 07:04:59,361 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:04:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 07:04:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 07:04:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:04:59,362 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:04:59,362 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 07:04:59,837 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:04:59,837 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2020-12-22 07:04:59,839 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:59 BoogieIcfgContainer [2020-12-22 07:04:59,839 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:04:59,841 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:04:59,841 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:04:59,846 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:04:59,846 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:04:58" (1/3) ... [2020-12-22 07:04:59,847 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b10150c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:04:59, skipping insertion in model container [2020-12-22 07:04:59,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:04:59" (2/3) ... [2020-12-22 07:04:59,848 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b10150c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:04:59, skipping insertion in model container [2020-12-22 07:04:59,848 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:04:59" (3/3) ... [2020-12-22 07:04:59,850 INFO L111 eAbstractionObserver]: Analyzing ICFG tree_max.c [2020-12-22 07:04:59,858 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:04:59,864 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:04:59,887 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:04:59,917 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:04:59,918 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:04:59,918 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:04:59,918 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:04:59,918 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:04:59,918 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:04:59,919 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:04:59,919 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:04:59,938 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-12-22 07:04:59,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 07:04:59,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:04:59,955 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:04:59,956 INFO L429 AbstractCegarLoop]: === Iteration 1 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:04:59,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:04:59,967 INFO L82 PathProgramCache]: Analyzing trace with hash 998783614, now seen corresponding path program 1 times [2020-12-22 07:04:59,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:04:59,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388453038] [2020-12-22 07:04:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:00,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:00,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:00,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:00,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-12-22 07:05:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:00,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:05:00,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388453038] [2020-12-22 07:05:00,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:00,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 07:05:00,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387962195] [2020-12-22 07:05:00,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 07:05:00,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:00,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 07:05:00,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:05:00,424 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 8 states. [2020-12-22 07:05:00,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:00,882 INFO L93 Difference]: Finished difference Result 74 states and 98 transitions. [2020-12-22 07:05:00,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 07:05:00,885 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-12-22 07:05:00,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:00,897 INFO L225 Difference]: With dead ends: 74 [2020-12-22 07:05:00,897 INFO L226 Difference]: Without dead ends: 35 [2020-12-22 07:05:00,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:05:00,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-12-22 07:05:00,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-12-22 07:05:00,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-12-22 07:05:00,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-12-22 07:05:00,958 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 18 [2020-12-22 07:05:00,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:00,959 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-12-22 07:05:00,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 07:05:00,959 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-12-22 07:05:00,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 07:05:00,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:00,962 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:00,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:05:00,963 INFO L429 AbstractCegarLoop]: === Iteration 2 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:00,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:00,964 INFO L82 PathProgramCache]: Analyzing trace with hash -976273983, now seen corresponding path program 1 times [2020-12-22 07:05:00,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:00,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969614439] [2020-12-22 07:05:00,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:00,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:01,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:01,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:01,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:01,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:01,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:01,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:01,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-22 07:05:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:01,309 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 07:05:01,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969614439] [2020-12-22 07:05:01,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:05:01,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 07:05:01,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413176893] [2020-12-22 07:05:01,312 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 07:05:01,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:01,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 07:05:01,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:05:01,313 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 9 states. [2020-12-22 07:05:01,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:01,605 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2020-12-22 07:05:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 07:05:01,606 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-12-22 07:05:01,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:01,608 INFO L225 Difference]: With dead ends: 48 [2020-12-22 07:05:01,608 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 07:05:01,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-12-22 07:05:01,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 07:05:01,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-22 07:05:01,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 07:05:01,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2020-12-22 07:05:01,621 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 28 [2020-12-22 07:05:01,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:01,621 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2020-12-22 07:05:01,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 07:05:01,622 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2020-12-22 07:05:01,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 07:05:01,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:01,624 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:01,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:05:01,624 INFO L429 AbstractCegarLoop]: === Iteration 3 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:01,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:01,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1376325807, now seen corresponding path program 1 times [2020-12-22 07:05:01,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:01,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914979606] [2020-12-22 07:05:01,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:01,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:01,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:01,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:01,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:01,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-22 07:05:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:01,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:02,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:05:02,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 07:05:02,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914979606] [2020-12-22 07:05:02,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215868171] [2020-12-22 07:05:02,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:05:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:02,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 48 conjunts are in the unsatisfiable core [2020-12-22 07:05:02,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:05:02,505 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:05:02,513 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:05:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 07:05:02,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:05:02,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2020-12-22 07:05:02,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670542676] [2020-12-22 07:05:02,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 07:05:02,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:02,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 07:05:02,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-12-22 07:05:02,544 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand 14 states. [2020-12-22 07:05:03,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:03,054 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2020-12-22 07:05:03,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 07:05:03,055 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-12-22 07:05:03,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:03,057 INFO L225 Difference]: With dead ends: 46 [2020-12-22 07:05:03,057 INFO L226 Difference]: Without dead ends: 44 [2020-12-22 07:05:03,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-12-22 07:05:03,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-22 07:05:03,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-12-22 07:05:03,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 07:05:03,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2020-12-22 07:05:03,069 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 41 [2020-12-22 07:05:03,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:03,070 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2020-12-22 07:05:03,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 07:05:03,070 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2020-12-22 07:05:03,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 07:05:03,072 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:03,073 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:03,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-22 07:05:03,289 INFO L429 AbstractCegarLoop]: === Iteration 4 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:03,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:03,290 INFO L82 PathProgramCache]: Analyzing trace with hash 2126921006, now seen corresponding path program 1 times [2020-12-22 07:05:03,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:03,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838171882] [2020-12-22 07:05:03,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:03,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:03,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:03,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:03,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:03,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:03,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-22 07:05:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:04,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:04,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:05:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:04,187 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:05:04,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838171882] [2020-12-22 07:05:04,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661257496] [2020-12-22 07:05:04,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:05:04,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:04,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 07:05:04,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:05:04,436 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:05:04,440 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:04,455 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:04,463 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:05:04,464 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:04,470 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:04,471 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:05:04,472 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-12-22 07:05:04,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 07:05:04,599 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-22 07:05:04,603 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:04,613 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:04,617 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-12-22 07:05:04,619 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2020-12-22 07:05:04,622 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:04,632 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:04,634 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:05:04,635 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:45, output treesize:19 [2020-12-22 07:05:05,122 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-22 07:05:05,124 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:05,135 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:05,139 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-22 07:05:05,141 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:05,145 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:05,146 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:05:05,147 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-12-22 07:05:05,170 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 07:05:05,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:05:05,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 15] total 33 [2020-12-22 07:05:05,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972819654] [2020-12-22 07:05:05,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 07:05:05,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:05,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 07:05:05,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=970, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 07:05:05,176 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand 33 states. [2020-12-22 07:05:08,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:08,659 INFO L93 Difference]: Finished difference Result 121 states and 167 transitions. [2020-12-22 07:05:08,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 07:05:08,660 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 47 [2020-12-22 07:05:08,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:08,665 INFO L225 Difference]: With dead ends: 121 [2020-12-22 07:05:08,665 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 07:05:08,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=382, Invalid=3650, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 07:05:08,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 07:05:08,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 91. [2020-12-22 07:05:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 07:05:08,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 134 transitions. [2020-12-22 07:05:08,722 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 134 transitions. Word has length 47 [2020-12-22 07:05:08,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:08,725 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 134 transitions. [2020-12-22 07:05:08,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 07:05:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 134 transitions. [2020-12-22 07:05:08,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 07:05:08,740 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:08,740 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:08,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:05:08,954 INFO L429 AbstractCegarLoop]: === Iteration 5 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:08,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:08,955 INFO L82 PathProgramCache]: Analyzing trace with hash -2051682644, now seen corresponding path program 1 times [2020-12-22 07:05:08,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:08,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486775246] [2020-12-22 07:05:08,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:08,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:09,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:09,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:09,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:09,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:09,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:09,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:09,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-12-22 07:05:09,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:09,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:09,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:09,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:05:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 07:05:09,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486775246] [2020-12-22 07:05:09,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979751993] [2020-12-22 07:05:09,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:05:09,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:09,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 07:05:09,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:05:09,558 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:05:09,559 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:09,570 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:09,574 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:05:09,575 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:09,590 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:09,594 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:05:09,595 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:37 [2020-12-22 07:05:10,085 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2020-12-22 07:05:10,087 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:10,097 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:10,101 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 10 [2020-12-22 07:05:10,103 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:10,110 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:10,112 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:05:10,114 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:55, output treesize:13 [2020-12-22 07:05:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 07:05:10,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:05:10,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 21 [2020-12-22 07:05:10,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952118504] [2020-12-22 07:05:10,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 07:05:10,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:10,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 07:05:10,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2020-12-22 07:05:10,145 INFO L87 Difference]: Start difference. First operand 91 states and 134 transitions. Second operand 21 states. [2020-12-22 07:05:11,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:11,375 INFO L93 Difference]: Finished difference Result 141 states and 198 transitions. [2020-12-22 07:05:11,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 07:05:11,376 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-12-22 07:05:11,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:11,378 INFO L225 Difference]: With dead ends: 141 [2020-12-22 07:05:11,379 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 07:05:11,380 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2020-12-22 07:05:11,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 07:05:11,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 79. [2020-12-22 07:05:11,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 07:05:11,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 109 transitions. [2020-12-22 07:05:11,398 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 109 transitions. Word has length 47 [2020-12-22 07:05:11,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:11,399 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 109 transitions. [2020-12-22 07:05:11,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 07:05:11,399 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 109 transitions. [2020-12-22 07:05:11,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 07:05:11,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:11,402 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:11,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:05:11,616 INFO L429 AbstractCegarLoop]: === Iteration 6 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:11,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:11,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1408716111, now seen corresponding path program 2 times [2020-12-22 07:05:11,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:11,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064656240] [2020-12-22 07:05:11,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:11,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:11,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:11,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:11,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:11,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:11,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:11,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:11,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-22 07:05:11,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:12,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:12,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:05:12,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 07:05:12,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064656240] [2020-12-22 07:05:12,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407131671] [2020-12-22 07:05:12,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:05:12,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:05:12,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:05:12,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 07:05:12,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:05:12,330 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:05:12,330 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:12,336 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:12,344 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:05:12,345 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:12,352 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:12,354 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:05:12,355 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:1 [2020-12-22 07:05:12,654 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-22 07:05:12,655 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:12,662 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:12,665 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2020-12-22 07:05:12,666 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:12,670 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:12,671 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:05:12,671 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-12-22 07:05:12,688 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 07:05:12,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:05:12,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 25 [2020-12-22 07:05:12,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699807624] [2020-12-22 07:05:12,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 07:05:12,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:12,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 07:05:12,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2020-12-22 07:05:12,691 INFO L87 Difference]: Start difference. First operand 79 states and 109 transitions. Second operand 25 states. [2020-12-22 07:05:14,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:14,221 INFO L93 Difference]: Finished difference Result 116 states and 161 transitions. [2020-12-22 07:05:14,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 07:05:14,221 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2020-12-22 07:05:14,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:14,226 INFO L225 Difference]: With dead ends: 116 [2020-12-22 07:05:14,226 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 07:05:14,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=217, Invalid=1675, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 07:05:14,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 07:05:14,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-12-22 07:05:14,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-12-22 07:05:14,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 146 transitions. [2020-12-22 07:05:14,276 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 146 transitions. Word has length 57 [2020-12-22 07:05:14,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:14,276 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 146 transitions. [2020-12-22 07:05:14,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 07:05:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 146 transitions. [2020-12-22 07:05:14,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 07:05:14,281 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:14,281 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:14,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:05:14,495 INFO L429 AbstractCegarLoop]: === Iteration 7 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:14,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:14,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1292352465, now seen corresponding path program 2 times [2020-12-22 07:05:14,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:14,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079322645] [2020-12-22 07:05:14,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:14,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:14,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:14,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:14,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:14,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:14,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:14,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:14,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:14,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:14,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-22 07:05:14,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:14,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:14,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:14,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:05:14,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:14,897 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 07:05:14,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079322645] [2020-12-22 07:05:14,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123161995] [2020-12-22 07:05:14,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:05:14,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:05:14,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:05:15,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 54 conjunts are in the unsatisfiable core [2020-12-22 07:05:15,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:05:15,108 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:05:15,109 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:15,115 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:15,117 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:05:15,117 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:10 [2020-12-22 07:05:15,590 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-22 07:05:15,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:05:15,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2020-12-22 07:05:15,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116932769] [2020-12-22 07:05:15,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 07:05:15,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:15,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 07:05:15,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2020-12-22 07:05:15,593 INFO L87 Difference]: Start difference. First operand 103 states and 146 transitions. Second operand 30 states. [2020-12-22 07:05:25,372 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-12-22 07:05:26,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:26,273 INFO L93 Difference]: Finished difference Result 163 states and 231 transitions. [2020-12-22 07:05:26,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 07:05:26,274 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 57 [2020-12-22 07:05:26,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:26,276 INFO L225 Difference]: With dead ends: 163 [2020-12-22 07:05:26,276 INFO L226 Difference]: Without dead ends: 142 [2020-12-22 07:05:26,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=271, Invalid=2699, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 07:05:26,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-22 07:05:26,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-12-22 07:05:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-22 07:05:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 156 transitions. [2020-12-22 07:05:26,298 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 156 transitions. Word has length 57 [2020-12-22 07:05:26,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:26,298 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 156 transitions. [2020-12-22 07:05:26,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 07:05:26,298 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 156 transitions. [2020-12-22 07:05:26,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:05:26,300 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:26,300 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:26,513 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 07:05:26,514 INFO L429 AbstractCegarLoop]: === Iteration 8 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:26,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:26,515 INFO L82 PathProgramCache]: Analyzing trace with hash -945278837, now seen corresponding path program 3 times [2020-12-22 07:05:26,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:26,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360367242] [2020-12-22 07:05:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:26,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:26,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:26,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:26,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:26,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:26,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:26,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-22 07:05:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:27,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:27,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:27,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:05:27,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:27,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:27,449 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:05:27,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:27,484 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 29 proven. 19 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-22 07:05:27,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360367242] [2020-12-22 07:05:27,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180314999] [2020-12-22 07:05:27,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:05:27,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 07:05:27,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:05:27,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 100 conjunts are in the unsatisfiable core [2020-12-22 07:05:27,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:05:27,710 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 07:05:27,711 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:27,719 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:27,723 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 07:05:27,724 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:27,731 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:27,734 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:05:27,734 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-12-22 07:05:28,869 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:05:28,980 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2020-12-22 07:05:28,982 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:28,997 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:29,002 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-12-22 07:05:29,005 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:29,018 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:29,020 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2020-12-22 07:05:29,020 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:58, output treesize:28 [2020-12-22 07:05:29,339 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:05:29,343 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:05:29,347 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:05:29,350 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:05:29,355 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:05:29,443 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 16 proven. 30 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2020-12-22 07:05:29,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:05:29,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 49 [2020-12-22 07:05:29,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795892424] [2020-12-22 07:05:29,447 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 07:05:29,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:29,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 07:05:29,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2214, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 07:05:29,449 INFO L87 Difference]: Start difference. First operand 108 states and 156 transitions. Second operand 49 states. [2020-12-22 07:05:31,881 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 50 [2020-12-22 07:05:32,558 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 07:05:33,791 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-12-22 07:05:33,997 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-12-22 07:05:34,341 WARN L197 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 69 [2020-12-22 07:05:34,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:34,938 INFO L93 Difference]: Finished difference Result 223 states and 412 transitions. [2020-12-22 07:05:34,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 07:05:34,939 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 70 [2020-12-22 07:05:34,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:34,943 INFO L225 Difference]: With dead ends: 223 [2020-12-22 07:05:34,943 INFO L226 Difference]: Without dead ends: 221 [2020-12-22 07:05:34,946 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=512, Invalid=5650, Unknown=0, NotChecked=0, Total=6162 [2020-12-22 07:05:34,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-22 07:05:34,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 151. [2020-12-22 07:05:34,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-12-22 07:05:34,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 245 transitions. [2020-12-22 07:05:34,988 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 245 transitions. Word has length 70 [2020-12-22 07:05:34,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:34,988 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 245 transitions. [2020-12-22 07:05:34,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 07:05:34,988 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 245 transitions. [2020-12-22 07:05:34,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:05:34,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:34,991 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:35,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:05:35,206 INFO L429 AbstractCegarLoop]: === Iteration 9 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:35,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:35,207 INFO L82 PathProgramCache]: Analyzing trace with hash -909256420, now seen corresponding path program 1 times [2020-12-22 07:05:35,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:35,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698444279] [2020-12-22 07:05:35,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:35,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:35,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:35,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:35,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:35,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:35,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:35,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:35,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-22 07:05:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:35,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:35,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:35,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:05:35,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:36,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:36,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:05:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-22 07:05:36,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698444279] [2020-12-22 07:05:36,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132161608] [2020-12-22 07:05:36,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:05:36,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:36,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 07:05:36,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:05:36,364 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:05:36,365 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:36,371 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:36,376 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:05:36,378 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:36,383 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:36,387 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:05:36,388 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:27, output treesize:1 [2020-12-22 07:05:37,020 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2020-12-22 07:05:37,022 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:37,040 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:37,043 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-12-22 07:05:37,044 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:37,049 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:37,050 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:05:37,050 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:45, output treesize:15 [2020-12-22 07:05:37,262 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:05:37,265 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:05:37,267 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:05:37,335 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-22 07:05:37,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:05:37,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 19] total 44 [2020-12-22 07:05:37,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258619245] [2020-12-22 07:05:37,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 07:05:37,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:37,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 07:05:37,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 07:05:37,338 INFO L87 Difference]: Start difference. First operand 151 states and 245 transitions. Second operand 44 states. [2020-12-22 07:05:40,920 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-12-22 07:05:41,150 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-12-22 07:05:43,718 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-12-22 07:05:44,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:44,541 INFO L93 Difference]: Finished difference Result 324 states and 604 transitions. [2020-12-22 07:05:44,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 07:05:44,542 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 71 [2020-12-22 07:05:44,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:44,547 INFO L225 Difference]: With dead ends: 324 [2020-12-22 07:05:44,548 INFO L226 Difference]: Without dead ends: 322 [2020-12-22 07:05:44,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=577, Invalid=6733, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 07:05:44,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-12-22 07:05:44,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 152. [2020-12-22 07:05:44,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-22 07:05:44,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 247 transitions. [2020-12-22 07:05:44,586 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 247 transitions. Word has length 71 [2020-12-22 07:05:44,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:44,587 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 247 transitions. [2020-12-22 07:05:44,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 07:05:44,587 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 247 transitions. [2020-12-22 07:05:44,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:05:44,589 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:44,589 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:44,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:05:44,803 INFO L429 AbstractCegarLoop]: === Iteration 10 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:44,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:44,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1931785932, now seen corresponding path program 2 times [2020-12-22 07:05:44,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:44,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800593515] [2020-12-22 07:05:44,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:44,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:44,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:44,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:44,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:44,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:44,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:44,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:44,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-22 07:05:44,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:44,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:44,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:05:44,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:45,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:45,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:05:45,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:45,014 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-22 07:05:45,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800593515] [2020-12-22 07:05:45,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160413285] [2020-12-22 07:05:45,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:05:45,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:05:45,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:05:45,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 07:05:45,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:05:45,259 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:05:45,261 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:05:45,387 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 10 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-12-22 07:05:45,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:05:45,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 19 [2020-12-22 07:05:45,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124454304] [2020-12-22 07:05:45,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 07:05:45,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:45,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 07:05:45,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2020-12-22 07:05:45,389 INFO L87 Difference]: Start difference. First operand 152 states and 247 transitions. Second operand 19 states. [2020-12-22 07:05:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:47,079 INFO L93 Difference]: Finished difference Result 343 states and 703 transitions. [2020-12-22 07:05:47,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 07:05:47,079 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 71 [2020-12-22 07:05:47,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:47,083 INFO L225 Difference]: With dead ends: 343 [2020-12-22 07:05:47,083 INFO L226 Difference]: Without dead ends: 228 [2020-12-22 07:05:47,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=365, Invalid=1705, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 07:05:47,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-12-22 07:05:47,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 183. [2020-12-22 07:05:47,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-22 07:05:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 309 transitions. [2020-12-22 07:05:47,113 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 309 transitions. Word has length 71 [2020-12-22 07:05:47,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:47,114 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 309 transitions. [2020-12-22 07:05:47,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 07:05:47,114 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 309 transitions. [2020-12-22 07:05:47,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:05:47,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:47,117 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:47,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 07:05:47,332 INFO L429 AbstractCegarLoop]: === Iteration 11 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:47,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1914561797, now seen corresponding path program 1 times [2020-12-22 07:05:47,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:47,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842549115] [2020-12-22 07:05:47,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:47,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:47,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:47,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:47,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:47,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:47,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:47,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:47,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:47,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-22 07:05:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:48,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:48,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:48,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:05:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:48,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:48,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:05:48,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 26 proven. 23 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-22 07:05:48,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842549115] [2020-12-22 07:05:48,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585718950] [2020-12-22 07:05:48,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:05:48,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:48,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 379 conjuncts, 80 conjunts are in the unsatisfiable core [2020-12-22 07:05:48,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:05:48,672 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:05:48,673 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:48,680 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:48,686 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:05:48,688 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:48,694 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:48,695 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:05:48,696 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:27, output treesize:1 [2020-12-22 07:05:49,175 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:05:49,177 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:05:49,180 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:05:49,687 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2020-12-22 07:05:49,689 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:49,696 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:49,699 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-12-22 07:05:49,700 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:49,705 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:49,706 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:05:49,706 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:13 [2020-12-22 07:05:49,958 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:05:49,961 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:05:49,962 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:05:50,035 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-22 07:05:50,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:05:50,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20] total 47 [2020-12-22 07:05:50,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450929977] [2020-12-22 07:05:50,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 07:05:50,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:50,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 07:05:50,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=2052, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 07:05:50,038 INFO L87 Difference]: Start difference. First operand 183 states and 309 transitions. Second operand 47 states. [2020-12-22 07:05:52,050 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-12-22 07:05:53,103 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-22 07:05:53,488 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-22 07:05:53,696 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-12-22 07:05:53,989 WARN L197 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 62 [2020-12-22 07:05:54,514 WARN L197 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-12-22 07:05:54,734 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-12-22 07:05:54,997 WARN L197 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 60 [2020-12-22 07:05:55,316 WARN L197 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 65 [2020-12-22 07:05:55,581 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 64 [2020-12-22 07:05:56,733 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-12-22 07:05:56,970 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-12-22 07:05:57,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:05:57,632 INFO L93 Difference]: Finished difference Result 294 states and 546 transitions. [2020-12-22 07:05:57,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 07:05:57,633 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 72 [2020-12-22 07:05:57,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:05:57,637 INFO L225 Difference]: With dead ends: 294 [2020-12-22 07:05:57,637 INFO L226 Difference]: Without dead ends: 292 [2020-12-22 07:05:57,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=548, Invalid=5932, Unknown=0, NotChecked=0, Total=6480 [2020-12-22 07:05:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-12-22 07:05:57,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 196. [2020-12-22 07:05:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-12-22 07:05:57,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 351 transitions. [2020-12-22 07:05:57,672 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 351 transitions. Word has length 72 [2020-12-22 07:05:57,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:05:57,672 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 351 transitions. [2020-12-22 07:05:57,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 07:05:57,673 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 351 transitions. [2020-12-22 07:05:57,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:05:57,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:05:57,676 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:05:57,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:05:57,890 INFO L429 AbstractCegarLoop]: === Iteration 12 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:05:57,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:05:57,891 INFO L82 PathProgramCache]: Analyzing trace with hash 872853690, now seen corresponding path program 1 times [2020-12-22 07:05:57,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:05:57,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852759504] [2020-12-22 07:05:57,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:05:57,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:58,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:58,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:58,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:58,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:05:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:58,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:05:58,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:58,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-22 07:05:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:58,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:58,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:58,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:05:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:58,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:05:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:58,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:05:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:58,729 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-22 07:05:58,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852759504] [2020-12-22 07:05:58,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103871035] [2020-12-22 07:05:58,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:05:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:05:58,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 07:05:58,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:05:58,879 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:05:58,880 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:58,889 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:58,894 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:05:58,895 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:58,901 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:58,903 INFO L547 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:05:58,904 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:27, output treesize:1 [2020-12-22 07:05:59,588 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2020-12-22 07:05:59,590 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:59,596 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:59,599 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-12-22 07:05:59,600 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:05:59,603 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:05:59,604 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:05:59,604 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:38, output treesize:7 [2020-12-22 07:05:59,763 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:05:59,765 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:05:59,826 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-12-22 07:05:59,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:05:59,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 42 [2020-12-22 07:05:59,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186363761] [2020-12-22 07:05:59,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 07:05:59,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:05:59,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 07:05:59,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1617, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 07:05:59,828 INFO L87 Difference]: Start difference. First operand 196 states and 351 transitions. Second operand 42 states. [2020-12-22 07:06:03,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:06:03,518 INFO L93 Difference]: Finished difference Result 263 states and 462 transitions. [2020-12-22 07:06:03,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 07:06:03,519 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 72 [2020-12-22 07:06:03,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:06:03,522 INFO L225 Difference]: With dead ends: 263 [2020-12-22 07:06:03,523 INFO L226 Difference]: Without dead ends: 261 [2020-12-22 07:06:03,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=323, Invalid=3709, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 07:06:03,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-12-22 07:06:03,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 179. [2020-12-22 07:06:03,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-22 07:06:03,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 304 transitions. [2020-12-22 07:06:03,552 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 304 transitions. Word has length 72 [2020-12-22 07:06:03,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:06:03,552 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 304 transitions. [2020-12-22 07:06:03,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 07:06:03,553 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 304 transitions. [2020-12-22 07:06:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-12-22 07:06:03,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:06:03,556 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:06:03,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:06:03,770 INFO L429 AbstractCegarLoop]: === Iteration 13 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:06:03,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:06:03,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1479239555, now seen corresponding path program 3 times [2020-12-22 07:06:03,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:06:03,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350021250] [2020-12-22 07:06:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:06:03,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:03,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:06:03,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:04,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:06:04,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:04,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:06:04,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:04,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:06:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:04,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 07:06:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:04,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-22 07:06:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:04,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:06:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:04,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:06:04,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:04,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:06:04,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:04,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-12-22 07:06:04,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 22 proven. 19 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-22 07:06:04,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350021250] [2020-12-22 07:06:04,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335226407] [2020-12-22 07:06:04,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:06:04,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 07:06:04,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:06:04,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 95 conjunts are in the unsatisfiable core [2020-12-22 07:06:04,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:06:04,608 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:06:04,609 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:06:04,620 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:06:04,625 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:06:04,625 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:3 [2020-12-22 07:06:04,674 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 07:06:04,675 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:06:04,681 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:06:04,685 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 07:06:04,686 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:06:04,694 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:06:04,696 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:06:04,704 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:26, output treesize:3 [2020-12-22 07:06:05,130 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2020-12-22 07:06:05,131 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:06:05,137 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:06:05,140 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2020-12-22 07:06:05,141 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:06:05,143 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:06:05,144 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:06:05,144 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:30, output treesize:7 [2020-12-22 07:06:05,156 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:06:05,158 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:06:05,209 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 07:06:05,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:06:05,210 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 33 [2020-12-22 07:06:05,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157606552] [2020-12-22 07:06:05,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 07:06:05,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:06:05,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 07:06:05,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=976, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 07:06:05,212 INFO L87 Difference]: Start difference. First operand 179 states and 304 transitions. Second operand 33 states. [2020-12-22 07:06:07,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:06:07,501 INFO L93 Difference]: Finished difference Result 215 states and 364 transitions. [2020-12-22 07:06:07,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 07:06:07,502 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-12-22 07:06:07,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:06:07,505 INFO L225 Difference]: With dead ends: 215 [2020-12-22 07:06:07,505 INFO L226 Difference]: Without dead ends: 213 [2020-12-22 07:06:07,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=291, Invalid=2679, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 07:06:07,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-22 07:06:07,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 198. [2020-12-22 07:06:07,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-12-22 07:06:07,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 335 transitions. [2020-12-22 07:06:07,532 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 335 transitions. Word has length 70 [2020-12-22 07:06:07,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:06:07,532 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 335 transitions. [2020-12-22 07:06:07,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 07:06:07,533 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 335 transitions. [2020-12-22 07:06:07,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 07:06:07,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:06:07,536 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:06:07,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 07:06:07,750 INFO L429 AbstractCegarLoop]: === Iteration 14 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:06:07,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:06:07,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1086227410, now seen corresponding path program 1 times [2020-12-22 07:06:07,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:06:07,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127623084] [2020-12-22 07:06:07,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:06:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:07,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:06:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:07,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:06:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:07,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:06:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:08,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:06:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:08,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 07:06:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:08,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-22 07:06:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:08,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:06:08,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:08,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:06:08,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:08,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:06:08,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:08,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-12-22 07:06:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 24 proven. 21 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 07:06:08,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127623084] [2020-12-22 07:06:08,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130352511] [2020-12-22 07:06:08,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:06:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:08,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 07:06:08,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:06:08,838 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:06:08,839 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:06:08,845 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:06:08,849 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:06:08,850 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:06:08,855 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:06:08,857 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:06:08,857 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:1 [2020-12-22 07:06:09,814 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 19 [2020-12-22 07:06:09,815 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:06:09,824 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:06:09,827 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2020-12-22 07:06:09,829 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:06:09,836 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:06:09,836 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:06:09,837 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:45, output treesize:15 [2020-12-22 07:06:10,058 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:06:10,060 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:06:10,062 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:06:10,142 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 07:06:10,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:06:10,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 20] total 44 [2020-12-22 07:06:10,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146179197] [2020-12-22 07:06:10,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 07:06:10,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:06:10,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 07:06:10,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1787, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 07:06:10,145 INFO L87 Difference]: Start difference. First operand 198 states and 335 transitions. Second operand 44 states. [2020-12-22 07:06:13,000 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2020-12-22 07:06:13,188 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-22 07:06:13,421 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-12-22 07:06:14,881 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-12-22 07:06:15,359 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-12-22 07:06:16,745 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 52 [2020-12-22 07:06:17,686 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 64 [2020-12-22 07:06:18,677 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-12-22 07:06:20,073 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-12-22 07:06:20,266 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-12-22 07:06:20,481 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 63 [2020-12-22 07:06:23,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:06:23,588 INFO L93 Difference]: Finished difference Result 565 states and 1188 transitions. [2020-12-22 07:06:23,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-12-22 07:06:23,589 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 71 [2020-12-22 07:06:23,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:06:23,596 INFO L225 Difference]: With dead ends: 565 [2020-12-22 07:06:23,596 INFO L226 Difference]: Without dead ends: 563 [2020-12-22 07:06:23,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4483 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=1326, Invalid=15704, Unknown=0, NotChecked=0, Total=17030 [2020-12-22 07:06:23,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2020-12-22 07:06:23,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 331. [2020-12-22 07:06:23,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 331 states. [2020-12-22 07:06:23,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 731 transitions. [2020-12-22 07:06:23,668 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 731 transitions. Word has length 71 [2020-12-22 07:06:23,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:06:23,668 INFO L481 AbstractCegarLoop]: Abstraction has 331 states and 731 transitions. [2020-12-22 07:06:23,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 07:06:23,669 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 731 transitions. [2020-12-22 07:06:23,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:06:23,674 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:06:23,674 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:06:23,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 07:06:23,889 INFO L429 AbstractCegarLoop]: === Iteration 15 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:06:23,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:06:23,890 INFO L82 PathProgramCache]: Analyzing trace with hash 1479346186, now seen corresponding path program 1 times [2020-12-22 07:06:23,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:06:23,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972119521] [2020-12-22 07:06:23,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:06:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:24,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:06:24,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:24,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:06:24,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:24,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:06:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:24,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:06:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:24,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:06:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:24,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-22 07:06:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:24,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:06:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:24,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:06:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:24,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:06:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:24,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:06:24,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:24,877 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-12-22 07:06:24,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972119521] [2020-12-22 07:06:24,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192535291] [2020-12-22 07:06:24,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:06:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:06:25,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 97 conjunts are in the unsatisfiable core [2020-12-22 07:06:25,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:06:25,109 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:06:25,110 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:06:25,121 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:06:25,125 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:06:25,126 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:06:25,135 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:06:25,137 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:06:25,137 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:33, output treesize:19 [2020-12-22 07:06:27,805 WARN L197 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 24 [2020-12-22 07:06:29,940 WARN L197 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 26 [2020-12-22 07:06:32,149 WARN L197 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 29 [2020-12-22 07:06:32,842 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:06:32,843 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 62 [2020-12-22 07:06:32,845 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-22 07:06:32,848 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-22 07:06:32,849 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 07:06:32,871 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:06:32,883 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:06:32,884 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 46 [2020-12-22 07:06:32,887 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-22 07:06:32,888 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-22 07:06:32,890 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-22 07:06:32,894 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:06:32,924 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-12-22 07:06:32,927 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:06:32,927 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:7 [2020-12-22 07:06:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 07:06:32,971 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:06:32,971 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 44 [2020-12-22 07:06:32,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519713330] [2020-12-22 07:06:32,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 07:06:32,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:06:32,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 07:06:32,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1743, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 07:06:32,973 INFO L87 Difference]: Start difference. First operand 331 states and 731 transitions. Second operand 44 states. [2020-12-22 07:06:38,293 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-12-22 07:06:42,476 WARN L197 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-12-22 07:06:44,587 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 07:06:45,351 WARN L197 SmtUtils]: Spent 675.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-12-22 07:06:47,481 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 47 [2020-12-22 07:06:51,672 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-12-22 07:06:55,949 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-12-22 07:06:58,221 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 54 [2020-12-22 07:07:01,041 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 07:07:03,218 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 07:07:05,246 WARN L197 SmtUtils]: Spent 605.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2020-12-22 07:07:07,437 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 47 [2020-12-22 07:07:11,648 WARN L197 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-12-22 07:07:15,836 WARN L197 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2020-12-22 07:07:16,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:07:16,224 INFO L93 Difference]: Finished difference Result 540 states and 1237 transitions. [2020-12-22 07:07:16,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 07:07:16,225 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 76 [2020-12-22 07:07:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:07:16,232 INFO L225 Difference]: With dead ends: 540 [2020-12-22 07:07:16,233 INFO L226 Difference]: Without dead ends: 528 [2020-12-22 07:07:16,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 48.4s TimeCoverageRelationStatistics Valid=514, Invalid=5036, Unknown=0, NotChecked=0, Total=5550 [2020-12-22 07:07:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2020-12-22 07:07:16,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 444. [2020-12-22 07:07:16,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-12-22 07:07:16,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1017 transitions. [2020-12-22 07:07:16,301 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1017 transitions. Word has length 76 [2020-12-22 07:07:16,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:07:16,301 INFO L481 AbstractCegarLoop]: Abstraction has 444 states and 1017 transitions. [2020-12-22 07:07:16,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 07:07:16,301 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1017 transitions. [2020-12-22 07:07:16,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:07:16,308 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:07:16,308 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:07:16,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 07:07:16,521 INFO L429 AbstractCegarLoop]: === Iteration 16 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:07:16,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:07:16,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1595709832, now seen corresponding path program 4 times [2020-12-22 07:07:16,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:07:16,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442573366] [2020-12-22 07:07:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:07:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:16,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:07:16,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:16,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:07:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:17,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:07:17,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:17,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:07:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:17,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:07:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:17,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-22 07:07:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:17,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:07:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:17,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:07:17,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:17,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:07:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:17,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:07:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 07:07:17,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442573366] [2020-12-22 07:07:17,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458308899] [2020-12-22 07:07:17,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:07:17,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 07:07:17,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:07:17,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 99 conjunts are in the unsatisfiable core [2020-12-22 07:07:17,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:07:17,496 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 07:07:17,497 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:07:17,505 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:17,510 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-22 07:07:17,511 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:07:17,519 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:17,520 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:07:17,521 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:26, output treesize:11 [2020-12-22 07:07:18,388 INFO L173 IndexEqualityManager]: detected equality via solver [2020-12-22 07:07:18,419 INFO L348 Elim1Store]: treesize reduction 8, result has 60.0 percent of original size [2020-12-22 07:07:18,419 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 41 [2020-12-22 07:07:18,421 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:07:18,423 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:07:18,423 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 07:07:18,437 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:18,466 INFO L348 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2020-12-22 07:07:18,467 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2020-12-22 07:07:18,468 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:07:18,478 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:18,480 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:07:18,480 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:64, output treesize:7 [2020-12-22 07:07:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 32 proven. 21 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2020-12-22 07:07:18,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:07:18,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 23] total 36 [2020-12-22 07:07:18,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456277368] [2020-12-22 07:07:18,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 07:07:18,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:07:18,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 07:07:18,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 07:07:18,515 INFO L87 Difference]: Start difference. First operand 444 states and 1017 transitions. Second operand 36 states. [2020-12-22 07:07:24,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:07:24,044 INFO L93 Difference]: Finished difference Result 1221 states and 3477 transitions. [2020-12-22 07:07:24,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 07:07:24,045 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-12-22 07:07:24,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:07:24,061 INFO L225 Difference]: With dead ends: 1221 [2020-12-22 07:07:24,062 INFO L226 Difference]: Without dead ends: 874 [2020-12-22 07:07:24,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=469, Invalid=4933, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 07:07:24,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-12-22 07:07:24,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 706. [2020-12-22 07:07:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-12-22 07:07:24,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1905 transitions. [2020-12-22 07:07:24,238 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1905 transitions. Word has length 76 [2020-12-22 07:07:24,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:07:24,239 INFO L481 AbstractCegarLoop]: Abstraction has 706 states and 1905 transitions. [2020-12-22 07:07:24,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 07:07:24,239 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1905 transitions. [2020-12-22 07:07:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 07:07:24,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:07:24,249 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:07:24,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:07:24,464 INFO L429 AbstractCegarLoop]: === Iteration 17 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:07:24,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:07:24,464 INFO L82 PathProgramCache]: Analyzing trace with hash 191480931, now seen corresponding path program 1 times [2020-12-22 07:07:24,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:07:24,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562255099] [2020-12-22 07:07:24,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:07:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:24,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:07:24,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:24,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:07:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:24,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:07:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:24,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:07:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:24,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 07:07:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:24,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-22 07:07:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:25,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:07:25,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:25,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:07:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:25,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:07:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:25,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-12-22 07:07:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 24 proven. 22 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 07:07:25,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562255099] [2020-12-22 07:07:25,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790211405] [2020-12-22 07:07:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:07:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:25,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-22 07:07:25,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:07:25,850 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:07:25,851 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:07:25,858 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:25,862 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:07:25,863 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:07:25,869 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:25,871 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:07:25,871 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:1 [2020-12-22 07:07:26,410 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:07:26,412 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:07:26,951 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:07:26,953 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:07:27,689 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 17 [2020-12-22 07:07:27,691 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:07:27,702 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:27,705 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2020-12-22 07:07:27,706 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:07:27,714 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:27,715 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:07:27,715 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:43, output treesize:13 [2020-12-22 07:07:28,031 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:07:28,033 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:07:28,034 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:07:28,146 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 4 proven. 29 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-12-22 07:07:28,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:07:28,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28] total 53 [2020-12-22 07:07:28,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850349549] [2020-12-22 07:07:28,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 07:07:28,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:07:28,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 07:07:28,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2616, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 07:07:28,148 INFO L87 Difference]: Start difference. First operand 706 states and 1905 transitions. Second operand 53 states. [2020-12-22 07:07:30,330 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-12-22 07:07:30,622 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2020-12-22 07:07:31,893 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 49 [2020-12-22 07:07:32,107 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-12-22 07:07:32,396 WARN L197 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-12-22 07:07:33,293 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 53 [2020-12-22 07:07:33,693 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 56 [2020-12-22 07:07:35,000 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 50 [2020-12-22 07:07:35,469 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-12-22 07:07:35,904 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-22 07:07:36,086 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2020-12-22 07:07:36,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:07:36,342 INFO L93 Difference]: Finished difference Result 800 states and 2235 transitions. [2020-12-22 07:07:36,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 07:07:36,343 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 72 [2020-12-22 07:07:36,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:07:36,359 INFO L225 Difference]: With dead ends: 800 [2020-12-22 07:07:36,360 INFO L226 Difference]: Without dead ends: 798 [2020-12-22 07:07:36,362 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=732, Invalid=8010, Unknown=0, NotChecked=0, Total=8742 [2020-12-22 07:07:36,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2020-12-22 07:07:36,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 706. [2020-12-22 07:07:36,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-12-22 07:07:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 1905 transitions. [2020-12-22 07:07:36,562 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 1905 transitions. Word has length 72 [2020-12-22 07:07:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:07:36,563 INFO L481 AbstractCegarLoop]: Abstraction has 706 states and 1905 transitions. [2020-12-22 07:07:36,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 07:07:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 1905 transitions. [2020-12-22 07:07:36,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:07:36,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:07:36,576 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:07:36,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 07:07:36,792 INFO L429 AbstractCegarLoop]: === Iteration 18 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:07:36,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:07:36,793 INFO L82 PathProgramCache]: Analyzing trace with hash 181678716, now seen corresponding path program 4 times [2020-12-22 07:07:36,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:07:36,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874574902] [2020-12-22 07:07:36,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:07:36,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:37,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:07:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:37,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:07:37,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:37,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:07:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:37,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:07:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:37,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 07:07:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:37,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-22 07:07:37,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:37,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:07:37,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:37,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:07:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:37,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:07:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:37,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-12-22 07:07:37,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 27 proven. 36 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-22 07:07:37,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874574902] [2020-12-22 07:07:37,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583512397] [2020-12-22 07:07:37,952 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:07:38,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 07:07:38,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:07:38,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 94 conjunts are in the unsatisfiable core [2020-12-22 07:07:38,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:07:38,106 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:07:38,107 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:07:38,110 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:38,111 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:07:38,111 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:13, output treesize:1 [2020-12-22 07:07:38,124 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:07:38,125 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:07:38,131 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:38,135 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:07:38,136 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:07:38,141 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:38,143 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:07:38,143 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:27, output treesize:1 [2020-12-22 07:07:39,388 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:39,389 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 62 [2020-12-22 07:07:39,391 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-22 07:07:39,394 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-22 07:07:39,395 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 07:07:39,416 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:39,429 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:39,430 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 38 [2020-12-22 07:07:39,433 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 07:07:39,434 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 2 disjuncts [2020-12-22 07:07:39,437 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:07:39,441 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:39,442 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:07:39,442 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:85, output treesize:7 [2020-12-22 07:07:39,464 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 28 proven. 34 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2020-12-22 07:07:39,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:07:39,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 19] total 39 [2020-12-22 07:07:39,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304097095] [2020-12-22 07:07:39,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 07:07:39,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:07:39,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 07:07:39,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 07:07:39,465 INFO L87 Difference]: Start difference. First operand 706 states and 1905 transitions. Second operand 39 states. [2020-12-22 07:07:47,334 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 59 [2020-12-22 07:07:54,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:07:54,781 INFO L93 Difference]: Finished difference Result 1273 states and 4505 transitions. [2020-12-22 07:07:54,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-12-22 07:07:54,782 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 76 [2020-12-22 07:07:54,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:07:54,813 INFO L225 Difference]: With dead ends: 1273 [2020-12-22 07:07:54,813 INFO L226 Difference]: Without dead ends: 1256 [2020-12-22 07:07:54,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=552, Invalid=5148, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 07:07:54,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2020-12-22 07:07:55,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1161. [2020-12-22 07:07:55,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1161 states. [2020-12-22 07:07:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 4244 transitions. [2020-12-22 07:07:55,288 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 4244 transitions. Word has length 76 [2020-12-22 07:07:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:07:55,291 INFO L481 AbstractCegarLoop]: Abstraction has 1161 states and 4244 transitions. [2020-12-22 07:07:55,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 07:07:55,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 4244 transitions. [2020-12-22 07:07:55,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 07:07:55,306 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:07:55,307 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 07:07:55,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 07:07:55,519 INFO L429 AbstractCegarLoop]: === Iteration 19 === [checkErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:07:55,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:07:55,520 INFO L82 PathProgramCache]: Analyzing trace with hash 298042362, now seen corresponding path program 2 times [2020-12-22 07:07:55,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:07:55,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687644235] [2020-12-22 07:07:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:07:55,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:55,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:07:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:56,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:07:56,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:56,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2020-12-22 07:07:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:56,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-12-22 07:07:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:56,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-12-22 07:07:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:56,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-12-22 07:07:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:56,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:07:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:56,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-12-22 07:07:56,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:56,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-12-22 07:07:56,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:56,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-12-22 07:07:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:07:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 07:07:56,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687644235] [2020-12-22 07:07:56,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286388165] [2020-12-22 07:07:56,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:07:56,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 07:07:56,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 07:07:56,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 97 conjunts are in the unsatisfiable core [2020-12-22 07:07:56,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:07:56,857 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2020-12-22 07:07:56,858 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:07:56,866 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:56,867 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:07:56,867 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:19 [2020-12-22 07:07:56,945 INFO L348 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2020-12-22 07:07:56,945 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 25 [2020-12-22 07:07:56,947 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-22 07:07:56,955 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:07:56,957 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:07:56,957 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:19 [2020-12-22 07:07:59,746 WARN L197 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 24 [2020-12-22 07:08:01,858 WARN L197 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 29 [2020-12-22 07:08:04,128 WARN L197 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 31 [2020-12-22 07:08:05,200 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:08:05,200 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 62 [2020-12-22 07:08:05,203 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-22 07:08:05,205 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-22 07:08:05,206 INFO L547 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-12-22 07:08:05,238 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:08:05,254 INFO L348 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:08:05,255 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 46 [2020-12-22 07:08:05,257 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-22 07:08:05,257 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-12-22 07:08:05,263 INFO L639 QuantifierPusher]: Distributing 3 conjuncts over 4 disjuncts [2020-12-22 07:08:05,265 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-22 07:08:05,280 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-22 07:08:05,283 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-22 07:08:05,284 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:103, output treesize:7 [2020-12-22 07:08:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 35 proven. 38 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 07:08:05,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:08:05,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 47 [2020-12-22 07:08:05,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089631201] [2020-12-22 07:08:05,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 07:08:05,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:08:05,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 07:08:05,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=2006, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 07:08:05,359 INFO L87 Difference]: Start difference. First operand 1161 states and 4244 transitions. Second operand 47 states. [2020-12-22 07:08:15,417 WARN L197 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 45 [2020-12-22 07:08:16,846 WARN L197 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 41 [2020-12-22 07:08:17,286 WARN L197 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 50 [2020-12-22 07:08:17,516 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 53 [2020-12-22 07:08:19,665 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 44 [2020-12-22 07:08:21,814 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 50 [2020-12-22 07:08:23,964 WARN L197 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 07:08:27,199 WARN L197 SmtUtils]: Spent 2.81 s on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-12-22 07:08:30,775 WARN L197 SmtUtils]: Spent 3.47 s on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-12-22 07:08:34,350 WARN L197 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 48 [2020-12-22 07:08:35,924 WARN L197 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 52 [2020-12-22 07:08:40,108 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 59 [2020-12-22 07:08:40,784 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-12-22 07:08:40,955 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2020-12-22 07:08:41,225 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-12-22 07:08:41,413 WARN L197 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 07:08:44,899 WARN L197 SmtUtils]: Spent 3.10 s on a formula simplification that was a NOOP. DAG size: 61 [2020-12-22 07:08:49,014 WARN L197 SmtUtils]: Spent 4.04 s on a formula simplification that was a NOOP. DAG size: 57 [2020-12-22 07:08:53,342 WARN L197 SmtUtils]: Spent 4.08 s on a formula simplification. DAG size of input: 65 DAG size of output: 46 [2020-12-22 07:08:56,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:08:56,696 INFO L93 Difference]: Finished difference Result 2046 states and 10099 transitions. [2020-12-22 07:08:56,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 07:08:56,698 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 76 [2020-12-22 07:08:56,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:08:56,771 INFO L225 Difference]: With dead ends: 2046 [2020-12-22 07:08:56,771 INFO L226 Difference]: Without dead ends: 2021 [2020-12-22 07:08:56,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 85 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2055 ImplicationChecksByTransitivity, 47.4s TimeCoverageRelationStatistics Valid=771, Invalid=7971, Unknown=0, NotChecked=0, Total=8742 [2020-12-22 07:08:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2021 states.