/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/loops/count_up_down-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 16:36:42,726 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 16:36:42,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 16:36:42,792 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 16:36:42,792 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 16:36:42,796 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 16:36:42,801 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 16:36:42,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 16:36:42,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 16:36:42,817 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 16:36:42,821 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 16:36:42,823 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 16:36:42,824 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 16:36:42,827 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 16:36:42,830 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 16:36:42,832 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 16:36:42,833 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 16:36:42,836 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 16:36:42,844 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 16:36:42,847 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 16:36:42,849 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 16:36:42,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 16:36:42,853 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 16:36:42,855 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 16:36:42,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-01-06 16:36:42,862 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 16:36:42,863 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 16:36:42,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 16:36:42,865 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 16:36:42,866 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 16:36:42,866 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 16:36:42,867 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 16:36:42,868 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 16:36:42,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 16:36:42,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 16:36:42,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 16:36:42,871 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 16:36:42,938 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 16:36:42,939 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 16:36:42,944 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 16:36:42,944 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 16:36:42,944 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 16:36:42,945 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 16:36:42,945 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 16:36:42,945 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 16:36:42,945 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 16:36:42,946 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 16:36:42,947 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 16:36:42,947 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 16:36:42,947 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 16:36:42,947 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 16:36:42,948 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 16:36:42,948 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 16:36:42,948 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 16:36:42,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:36:42,949 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 16:36:42,949 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 16:36:42,949 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 16:36:42,949 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 16:36:42,950 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 16:36:42,950 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 16:36:42,950 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 16:36:42,950 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 16:36:43,432 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 16:36:43,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 16:36:43,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 16:36:43,472 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 16:36:43,473 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 16:36:43,474 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/count_up_down-1.c [2021-01-06 16:36:43,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ffdc8f4e3/ee3a1601cf0949e6b24f3cf9d83aeaf8/FLAG635500844 [2021-01-06 16:36:44,289 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 16:36:44,290 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/count_up_down-1.c [2021-01-06 16:36:44,300 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ffdc8f4e3/ee3a1601cf0949e6b24f3cf9d83aeaf8/FLAG635500844 [2021-01-06 16:36:44,635 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/ffdc8f4e3/ee3a1601cf0949e6b24f3cf9d83aeaf8 [2021-01-06 16:36:44,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 16:36:44,642 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 16:36:44,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 16:36:44,645 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 16:36:44,650 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 16:36:44,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@102b3d62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44, skipping insertion in model container [2021-01-06 16:36:44,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,663 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 16:36:44,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-01-06 16:36:44,855 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/count_up_down-1.c[327,340] [2021-01-06 16:36:44,869 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:36:44,881 INFO L203 MainTranslator]: Completed pre-run [2021-01-06 16:36:44,897 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/loops/count_up_down-1.c[327,340] [2021-01-06 16:36:44,900 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 16:36:44,918 INFO L208 MainTranslator]: Completed translation [2021-01-06 16:36:44,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44 WrapperNode [2021-01-06 16:36:44,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 16:36:44,920 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 16:36:44,920 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 16:36:44,920 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 16:36:44,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,939 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 16:36:44,963 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 16:36:44,963 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 16:36:44,964 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 16:36:44,974 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,979 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,984 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,986 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... [2021-01-06 16:36:44,988 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 16:36:44,989 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 16:36:44,989 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 16:36:44,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 16:36:44,991 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 16:36:45,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 16:36:45,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 16:36:45,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 16:36:45,093 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 16:36:45,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 16:36:45,394 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-01-06 16:36:45,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:36:45 BoogieIcfgContainer [2021-01-06 16:36:45,397 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 16:36:45,401 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 16:36:45,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 16:36:45,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 16:36:45,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 04:36:44" (1/3) ... [2021-01-06 16:36:45,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37afe76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:36:45, skipping insertion in model container [2021-01-06 16:36:45,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 04:36:44" (2/3) ... [2021-01-06 16:36:45,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37afe76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 04:36:45, skipping insertion in model container [2021-01-06 16:36:45,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 04:36:45" (3/3) ... [2021-01-06 16:36:45,414 INFO L111 eAbstractionObserver]: Analyzing ICFG count_up_down-1.c [2021-01-06 16:36:45,423 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 16:36:45,429 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 16:36:45,456 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-01-06 16:36:45,579 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 16:36:45,579 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 16:36:45,579 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 16:36:45,580 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 16:36:45,580 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 16:36:45,580 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 16:36:45,580 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 16:36:45,580 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 16:36:45,611 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states. [2021-01-06 16:36:45,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 16:36:45,618 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:45,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 16:36:45,619 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:45,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:45,627 INFO L82 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-01-06 16:36:45,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:45,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583399645] [2021-01-06 16:36:45,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:36:46,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583399645] [2021-01-06 16:36:46,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 16:36:46,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-01-06 16:36:46,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761092934] [2021-01-06 16:36:46,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 16:36:46,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:46,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 16:36:46,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 16:36:46,234 INFO L87 Difference]: Start difference. First operand 10 states. Second operand 5 states. [2021-01-06 16:36:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:46,426 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2021-01-06 16:36:46,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 16:36:46,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2021-01-06 16:36:46,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:46,439 INFO L225 Difference]: With dead ends: 23 [2021-01-06 16:36:46,439 INFO L226 Difference]: Without dead ends: 8 [2021-01-06 16:36:46,443 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-01-06 16:36:46,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-01-06 16:36:46,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-01-06 16:36:46,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-01-06 16:36:46,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-01-06 16:36:46,479 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-01-06 16:36:46,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:46,480 INFO L481 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-01-06 16:36:46,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 16:36:46,480 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-01-06 16:36:46,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-01-06 16:36:46,481 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:46,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:46,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 16:36:46,482 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:46,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:46,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-01-06 16:36:46,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:46,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49590377] [2021-01-06 16:36:46,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:46,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:36:46,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49590377] [2021-01-06 16:36:46,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628509835] [2021-01-06 16:36:46,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:46,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 16:36:46,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:46,964 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:36:46,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:36:46,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:46,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-01-06 16:36:46,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732909104] [2021-01-06 16:36:46,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 16:36:46,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:46,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 16:36:46,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-01-06 16:36:46,991 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 9 states. [2021-01-06 16:36:47,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:47,117 INFO L93 Difference]: Finished difference Result 16 states and 17 transitions. [2021-01-06 16:36:47,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-01-06 16:36:47,118 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 7 [2021-01-06 16:36:47,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:47,119 INFO L225 Difference]: With dead ends: 16 [2021-01-06 16:36:47,119 INFO L226 Difference]: Without dead ends: 10 [2021-01-06 16:36:47,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-01-06 16:36:47,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-01-06 16:36:47,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-01-06 16:36:47,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-01-06 16:36:47,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-01-06 16:36:47,125 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-01-06 16:36:47,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:47,126 INFO L481 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-01-06 16:36:47,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 16:36:47,126 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-01-06 16:36:47,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-01-06 16:36:47,127 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:47,127 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:47,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-01-06 16:36:47,341 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:47,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:47,343 INFO L82 PathProgramCache]: Analyzing trace with hash 492108272, now seen corresponding path program 2 times [2021-01-06 16:36:47,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:47,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22523613] [2021-01-06 16:36:47,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:47,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:36:48,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22523613] [2021-01-06 16:36:48,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19430973] [2021-01-06 16:36:48,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:48,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 16:36:48,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:36:48,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 16:36:48,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:48,233 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:36:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:36:48,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:36:48,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-01-06 16:36:48,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336005761] [2021-01-06 16:36:48,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:36:48,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:36:48,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:36:48,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:36:48,261 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 13 states. [2021-01-06 16:36:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:36:48,798 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2021-01-06 16:36:48,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 16:36:48,799 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 9 [2021-01-06 16:36:48,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:36:48,800 INFO L225 Difference]: With dead ends: 18 [2021-01-06 16:36:48,800 INFO L226 Difference]: Without dead ends: 12 [2021-01-06 16:36:48,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-01-06 16:36:48,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-01-06 16:36:48,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-01-06 16:36:48,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-01-06 16:36:48,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-01-06 16:36:48,806 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2021-01-06 16:36:48,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:36:48,806 INFO L481 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-01-06 16:36:48,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:36:48,807 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-01-06 16:36:48,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 16:36:48,807 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:36:48,808 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2021-01-06 16:36:49,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:49,023 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:36:49,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:36:49,024 INFO L82 PathProgramCache]: Analyzing trace with hash 522938704, now seen corresponding path program 3 times [2021-01-06 16:36:49,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:36:49,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203469428] [2021-01-06 16:36:49,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:36:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:36:49,741 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:36:49,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203469428] [2021-01-06 16:36:49,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67320045] [2021-01-06 16:36:49,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:36:49,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 16:36:49,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:36:49,898 WARN L261 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 38 conjunts are in the unsatisfiable core [2021-01-06 16:36:49,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:36:50,957 WARN L197 SmtUtils]: Spent 342.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 755 [2021-01-06 16:37:05,652 WARN L197 SmtUtils]: Spent 11.12 s on a formula simplification. DAG size of input: 755 DAG size of output: 32 [2021-01-06 16:37:05,785 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:05,942 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2021-01-06 16:37:06,067 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 17 disjuncts [2021-01-06 16:37:06,648 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:07,563 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:08,678 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:09,398 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:09,953 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:10,708 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:11,765 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:12,271 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:12,875 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 17 disjuncts [2021-01-06 16:37:13,170 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:13,735 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:14,502 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:14,971 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:15,303 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:15,762 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:16,342 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:16,649 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:17,017 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 20 disjuncts [2021-01-06 16:37:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:37:17,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:37:17,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-01-06 16:37:17,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711834825] [2021-01-06 16:37:17,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 16:37:17,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:37:17,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 16:37:17,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-01-06 16:37:17,309 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 13 states. [2021-01-06 16:37:25,009 WARN L197 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2021-01-06 16:37:30,465 WARN L197 SmtUtils]: Spent 3.26 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-01-06 16:37:32,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:37:32,524 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-01-06 16:37:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 16:37:32,525 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2021-01-06 16:37:32,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:37:32,526 INFO L225 Difference]: With dead ends: 20 [2021-01-06 16:37:32,526 INFO L226 Difference]: Without dead ends: 14 [2021-01-06 16:37:32,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 26.0s TimeCoverageRelationStatistics Valid=54, Invalid=185, Unknown=1, NotChecked=0, Total=240 [2021-01-06 16:37:32,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-01-06 16:37:32,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-01-06 16:37:32,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-01-06 16:37:32,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-01-06 16:37:32,531 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 11 [2021-01-06 16:37:32,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:37:32,532 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-01-06 16:37:32,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 16:37:32,532 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-01-06 16:37:32,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 16:37:32,533 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:37:32,533 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1] [2021-01-06 16:37:32,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:37:32,735 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:37:32,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:37:32,736 INFO L82 PathProgramCache]: Analyzing trace with hash 86212784, now seen corresponding path program 4 times [2021-01-06 16:37:32,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:37:32,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138265600] [2021-01-06 16:37:32,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:37:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:37:33,657 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:37:33,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138265600] [2021-01-06 16:37:33,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816266918] [2021-01-06 16:37:33,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:37:33,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 16:37:33,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:37:33,777 WARN L261 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 40 conjunts are in the unsatisfiable core [2021-01-06 16:37:33,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:37:35,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 16:37:35,422 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:35,451 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 16:37:35,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:37:35,777 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:36,218 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:36,783 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:37,755 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:38,942 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:40,110 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:41,229 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:41,731 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:42,335 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:43,048 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:43,900 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:45,272 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:45,294 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:37:45,316 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 16:37:45,346 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2021-01-06 16:37:45,510 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:45,758 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:46,126 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:46,723 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:48,001 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:49,236 INFO L757 QuantifierPusher]: Run 60 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:50,333 INFO L757 QuantifierPusher]: Run 70 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:50,836 INFO L757 QuantifierPusher]: Run 80 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:51,419 INFO L757 QuantifierPusher]: Run 90 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:52,113 INFO L757 QuantifierPusher]: Run 100 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:52,959 INFO L757 QuantifierPusher]: Run 110 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:37:54,246 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 16:37:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:37:54,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 16:37:54,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 20 [2021-01-06 16:37:54,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521258396] [2021-01-06 16:37:54,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 16:37:54,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:37:54,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 16:37:54,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-01-06 16:37:54,317 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand 20 states. [2021-01-06 16:37:59,061 WARN L197 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-01-06 16:38:12,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:38:12,382 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-01-06 16:38:12,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 16:38:12,383 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 13 [2021-01-06 16:38:12,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:38:12,383 INFO L225 Difference]: With dead ends: 22 [2021-01-06 16:38:12,384 INFO L226 Difference]: Without dead ends: 16 [2021-01-06 16:38:12,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=81, Invalid=470, Unknown=1, NotChecked=0, Total=552 [2021-01-06 16:38:12,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-01-06 16:38:12,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-01-06 16:38:12,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2021-01-06 16:38:12,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-01-06 16:38:12,389 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 13 [2021-01-06 16:38:12,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:38:12,389 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-01-06 16:38:12,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 16:38:12,390 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-01-06 16:38:12,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 16:38:12,390 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:38:12,390 INFO L422 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1] [2021-01-06 16:38:12,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:38:12,592 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:38:12,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:38:12,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1299398672, now seen corresponding path program 5 times [2021-01-06 16:38:12,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:38:12,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303619332] [2021-01-06 16:38:12,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:38:12,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:38:15,704 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:38:15,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303619332] [2021-01-06 16:38:15,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210917299] [2021-01-06 16:38:15,705 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:38:15,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 16:38:15,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:38:15,870 WARN L261 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 55 conjunts are in the unsatisfiable core [2021-01-06 16:38:15,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 16:38:16,687 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 1042 DAG size of output: 855 [2021-01-06 16:38:49,576 WARN L197 SmtUtils]: Spent 24.05 s on a formula simplification. DAG size of input: 855 DAG size of output: 42 [2021-01-06 16:38:49,620 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:38:49,690 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 8 disjuncts [2021-01-06 16:38:49,753 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 16:38:49,790 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 12 disjuncts [2021-01-06 16:38:49,921 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 13 disjuncts [2021-01-06 16:38:49,970 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 16:38:50,041 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2021-01-06 16:38:50,114 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2021-01-06 16:38:53,293 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-01-06 16:38:53,386 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: variable got div captured [2021-01-06 16:38:53,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-01-06 16:38:53,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-01-06 16:38:53,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060411932] [2021-01-06 16:38:53,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 16:38:53,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 16:38:53,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 16:38:53,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=228, Unknown=1, NotChecked=0, Total=272 [2021-01-06 16:38:53,388 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 14 states. [2021-01-06 16:38:55,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 16:38:55,216 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-01-06 16:38:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 16:38:55,225 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 15 [2021-01-06 16:38:55,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 16:38:55,226 INFO L225 Difference]: With dead ends: 21 [2021-01-06 16:38:55,226 INFO L226 Difference]: Without dead ends: 17 [2021-01-06 16:38:55,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 36.5s TimeCoverageRelationStatistics Valid=52, Invalid=289, Unknown=1, NotChecked=0, Total=342 [2021-01-06 16:38:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-01-06 16:38:55,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-01-06 16:38:55,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2021-01-06 16:38:55,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-01-06 16:38:55,233 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-01-06 16:38:55,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 16:38:55,233 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-01-06 16:38:55,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 16:38:55,234 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-01-06 16:38:55,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 16:38:55,234 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 16:38:55,235 INFO L422 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1] [2021-01-06 16:38:55,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-01-06 16:38:55,439 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 16:38:55,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 16:38:55,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1628318539, now seen corresponding path program 6 times [2021-01-06 16:38:55,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 16:38:55,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532161839] [2021-01-06 16:38:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 16:38:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 16:38:56,948 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 16:38:56,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532161839] [2021-01-06 16:38:56,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870572428] [2021-01-06 16:38:56,948 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 16:38:57,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 16:38:57,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 16:38:57,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 59 conjunts are in the unsatisfiable core [2021-01-06 16:38:57,361 INFO L286 TraceCheckSpWp]: Computing forward predicates...