/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:13:14,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:13:14,020 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:13:14,036 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:13:14,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:13:14,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:13:14,040 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:13:14,042 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:13:14,044 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:13:14,045 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:13:14,046 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:13:14,047 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:13:14,048 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:13:14,049 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:13:14,050 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:13:14,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:13:14,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:13:14,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:13:14,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:13:14,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:13:14,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:13:14,061 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:13:14,062 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:13:14,063 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:13:14,066 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-07 11:13:14,066 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-07 11:13:14,066 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-07 11:13:14,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-07 11:13:14,068 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-07 11:13:14,069 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-07 11:13:14,069 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-07 11:13:14,070 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-07 11:13:14,071 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-07 11:13:14,071 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-07 11:13:14,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-07 11:13:14,073 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-07 11:13:14,074 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-07 11:13:14,074 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-07 11:13:14,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:13:14,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:13:14,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:13:14,077 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:13:14,095 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:13:14,096 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:13:14,098 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:13:14,098 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:13:14,098 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:13:14,099 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:13:14,099 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:13:14,099 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:13:14,099 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:13:14,100 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:13:14,100 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:13:14,100 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:13:14,100 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:13:14,100 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:13:14,101 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:13:14,101 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:13:14,101 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:13:14,101 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:13:14,102 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:13:14,102 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:13:14,102 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:13:14,102 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:13:14,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:13:14,103 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:13:14,103 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:13:14,103 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:13:14,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:13:14,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:13:14,104 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:13:14,104 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:13:14,479 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:13:14,505 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:13:14,510 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:13:14,512 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:13:14,512 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:13:14,514 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-07-07 11:13:14,612 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/204c30b97/7dedae7875ac4c3998190bb70f179136/FLAGaa3b46599 [2020-07-07 11:13:15,273 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:13:15,274 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_15x0-1.c [2020-07-07 11:13:15,282 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/204c30b97/7dedae7875ac4c3998190bb70f179136/FLAGaa3b46599 [2020-07-07 11:13:15,658 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/204c30b97/7dedae7875ac4c3998190bb70f179136 [2020-07-07 11:13:15,673 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:13:15,676 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:13:15,677 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:13:15,677 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:13:15,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:13:15,683 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:13:15" (1/1) ... [2020-07-07 11:13:15,687 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@442d7b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:15, skipping insertion in model container [2020-07-07 11:13:15,687 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:13:15" (1/1) ... [2020-07-07 11:13:15,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:13:15,724 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:13:15,907 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:13:15,912 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:13:15,931 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:13:15,949 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:13:15,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:15 WrapperNode [2020-07-07 11:13:15,950 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:13:15,951 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:13:15,952 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:13:15,952 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:13:15,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:15" (1/1) ... [2020-07-07 11:13:15,969 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:15" (1/1) ... [2020-07-07 11:13:15,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:15" (1/1) ... [2020-07-07 11:13:15,976 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:15" (1/1) ... [2020-07-07 11:13:15,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:15" (1/1) ... [2020-07-07 11:13:15,983 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:15" (1/1) ... [2020-07-07 11:13:15,984 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:15" (1/1) ... [2020-07-07 11:13:15,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:13:15,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:13:15,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:13:15,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:13:15,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:15" (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 [2020-07-07 11:13:16,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:13:16,195 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:13:16,196 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-07 11:13:16,196 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:13:16,196 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:13:16,196 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-07 11:13:16,196 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:13:16,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:13:16,197 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:13:16,396 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:13:16,397 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:13:16,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:13:16 BoogieIcfgContainer [2020-07-07 11:13:16,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:13:16,409 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:13:16,409 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:13:16,414 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:13:16,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:13:15" (1/3) ... [2020-07-07 11:13:16,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28bb282e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:13:16, skipping insertion in model container [2020-07-07 11:13:16,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:13:15" (2/3) ... [2020-07-07 11:13:16,418 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28bb282e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:13:16, skipping insertion in model container [2020-07-07 11:13:16,419 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:13:16" (3/3) ... [2020-07-07 11:13:16,421 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_15x0-1.c [2020-07-07 11:13:16,435 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:13:16,447 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:13:16,461 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:13:16,487 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:13:16,488 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:13:16,488 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:13:16,488 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:13:16,488 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:13:16,489 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:13:16,489 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:13:16,489 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:13:16,508 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-07 11:13:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:13:16,515 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:16,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:16,518 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:16,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:16,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-07 11:13:16,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:16,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711461622] [2020-07-07 11:13:16,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:16,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:13:16,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711461622] [2020-07-07 11:13:16,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:13:16,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:13:16,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999035893] [2020-07-07 11:13:16,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:13:16,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:16,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:13:16,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:13:16,809 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-07 11:13:17,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:17,006 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-07 11:13:17,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:13:17,010 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-07 11:13:17,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:17,025 INFO L225 Difference]: With dead ends: 30 [2020-07-07 11:13:17,026 INFO L226 Difference]: Without dead ends: 18 [2020-07-07 11:13:17,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:13:17,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-07 11:13:17,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-07 11:13:17,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-07 11:13:17,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-07 11:13:17,125 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-07 11:13:17,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:17,126 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-07 11:13:17,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:13:17,126 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-07 11:13:17,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 11:13:17,134 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:17,134 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:17,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:13:17,135 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:17,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:17,136 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-07 11:13:17,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:17,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107852410] [2020-07-07 11:13:17,137 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:17,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:13:17,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107852410] [2020-07-07 11:13:17,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877034463] [2020-07-07 11:13:17,392 INFO L94 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 [2020-07-07 11:13:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:17,462 INFO L264 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:13:17,474 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:17,576 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:13:17,580 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:17,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-07 11:13:17,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473943275] [2020-07-07 11:13:17,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-07 11:13:17,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:17,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-07 11:13:17,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-07 11:13:17,587 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-07 11:13:17,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:17,699 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-07 11:13:17,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:13:17,701 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-07 11:13:17,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:17,703 INFO L225 Difference]: With dead ends: 25 [2020-07-07 11:13:17,703 INFO L226 Difference]: Without dead ends: 21 [2020-07-07 11:13:17,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:13:17,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-07 11:13:17,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-07 11:13:17,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 11:13:17,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-07 11:13:17,724 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-07 11:13:17,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:17,728 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-07 11:13:17,729 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-07 11:13:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-07 11:13:17,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 11:13:17,732 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:17,733 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:17,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:13:17,950 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:17,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:17,951 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-07 11:13:17,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:17,952 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970707107] [2020-07-07 11:13:17,953 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:13:18,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970707107] [2020-07-07 11:13:18,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678575295] [2020-07-07 11:13:18,160 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-07-07 11:13:18,200 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:13:18,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:18,202 INFO L264 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:13:18,205 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:13:18,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:18,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-07 11:13:18,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394122918] [2020-07-07 11:13:18,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:13:18,240 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:18,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:13:18,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:13:18,241 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-07 11:13:18,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:18,341 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-07 11:13:18,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:13:18,341 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-07 11:13:18,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:18,344 INFO L225 Difference]: With dead ends: 28 [2020-07-07 11:13:18,344 INFO L226 Difference]: Without dead ends: 24 [2020-07-07 11:13:18,346 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:13:18,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-07 11:13:18,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-07 11:13:18,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-07 11:13:18,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-07 11:13:18,362 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-07 11:13:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:18,363 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-07 11:13:18,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:13:18,363 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-07 11:13:18,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 11:13:18,365 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:18,365 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:18,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:18,582 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:18,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:18,584 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-07 11:13:18,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:18,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79567846] [2020-07-07 11:13:18,585 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:18,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:18,858 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:13:18,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79567846] [2020-07-07 11:13:18,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674254322] [2020-07-07 11:13:18,860 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-07-07 11:13:18,899 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 11:13:18,900 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:18,901 INFO L264 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 11:13:18,904 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:18,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:13:18,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:18,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-07 11:13:18,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883521484] [2020-07-07 11:13:18,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:13:18,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:18,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:13:18,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:13:18,944 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-07 11:13:19,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:19,059 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-07 11:13:19,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:13:19,060 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-07 11:13:19,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:19,061 INFO L225 Difference]: With dead ends: 31 [2020-07-07 11:13:19,062 INFO L226 Difference]: Without dead ends: 27 [2020-07-07 11:13:19,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:13:19,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-07 11:13:19,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-07 11:13:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 11:13:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-07 11:13:19,071 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-07 11:13:19,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:19,071 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-07 11:13:19,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:13:19,072 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-07 11:13:19,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 11:13:19,073 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:19,073 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:19,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:19,291 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:19,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:19,292 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-07 11:13:19,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:19,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555888515] [2020-07-07 11:13:19,293 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:19,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:19,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-07 11:13:19,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555888515] [2020-07-07 11:13:19,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483332495] [2020-07-07 11:13:19,495 INFO L92 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 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 [2020-07-07 11:13:19,534 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:13:19,535 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:19,536 INFO L264 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:13:19,539 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:19,601 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-07 11:13:19,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:19,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-07 11:13:19,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595245021] [2020-07-07 11:13:19,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:13:19,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:19,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:13:19,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:13:19,610 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-07 11:13:19,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:19,767 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-07 11:13:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:13:19,772 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-07 11:13:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:19,776 INFO L225 Difference]: With dead ends: 34 [2020-07-07 11:13:19,777 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 11:13:19,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:13:19,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 11:13:19,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-07 11:13:19,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 11:13:19,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-07 11:13:19,800 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-07 11:13:19,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:19,801 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-07 11:13:19,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:13:19,805 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-07 11:13:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-07 11:13:19,807 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:19,807 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:20,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:20,010 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:20,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:20,010 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-07 11:13:20,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:20,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347198988] [2020-07-07 11:13:20,012 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:20,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:20,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:20,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-07 11:13:20,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347198988] [2020-07-07 11:13:20,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487872353] [2020-07-07 11:13:20,253 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2020-07-07 11:13:20,308 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-07 11:13:20,308 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:20,310 INFO L264 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-07 11:13:20,314 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:20,355 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-07 11:13:20,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:20,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-07 11:13:20,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60691872] [2020-07-07 11:13:20,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:13:20,375 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:20,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:13:20,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:13:20,376 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-07 11:13:20,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:20,515 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-07 11:13:20,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:13:20,515 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-07 11:13:20,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:20,519 INFO L225 Difference]: With dead ends: 37 [2020-07-07 11:13:20,520 INFO L226 Difference]: Without dead ends: 33 [2020-07-07 11:13:20,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:13:20,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-07 11:13:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-07 11:13:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 11:13:20,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-07 11:13:20,530 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-07 11:13:20,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:20,530 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-07 11:13:20,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:13:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-07 11:13:20,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-07 11:13:20,533 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:20,533 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:20,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-07 11:13:20,741 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:20,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:20,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-07 11:13:20,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:20,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681882163] [2020-07-07 11:13:20,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:20,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:20,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:21,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:21,123 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-07 11:13:21,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681882163] [2020-07-07 11:13:21,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826486313] [2020-07-07 11:13:21,125 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-07-07 11:13:21,200 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-07 11:13:21,201 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:21,204 INFO L264 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-07 11:13:21,220 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-07 11:13:21,305 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:21,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-07 11:13:21,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260053308] [2020-07-07 11:13:21,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 11:13:21,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:21,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 11:13:21,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:13:21,309 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-07 11:13:21,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:21,465 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-07 11:13:21,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:13:21,466 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-07 11:13:21,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:21,468 INFO L225 Difference]: With dead ends: 40 [2020-07-07 11:13:21,468 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 11:13:21,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:13:21,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 11:13:21,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-07 11:13:21,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 11:13:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-07 11:13:21,477 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-07 11:13:21,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:21,478 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-07 11:13:21,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 11:13:21,478 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-07 11:13:21,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-07 11:13:21,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:21,480 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:21,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:21,696 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:21,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:21,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-07 11:13:21,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:21,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055645933] [2020-07-07 11:13:21,698 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:21,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:21,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:21,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:21,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:21,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-07 11:13:21,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055645933] [2020-07-07 11:13:21,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694606270] [2020-07-07 11:13:21,978 INFO L92 rtionOrderModulation]: Changing assertion order to 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 [2020-07-07 11:13:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:22,039 INFO L264 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-07 11:13:22,043 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:22,079 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-07 11:13:22,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:22,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-07 11:13:22,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798853109] [2020-07-07 11:13:22,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:13:22,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:22,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:13:22,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:13:22,083 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-07 11:13:22,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:22,218 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-07 11:13:22,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:13:22,219 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-07 11:13:22,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:22,221 INFO L225 Difference]: With dead ends: 43 [2020-07-07 11:13:22,221 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 11:13:22,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-07-07 11:13:22,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 11:13:22,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-07 11:13:22,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 11:13:22,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-07 11:13:22,229 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-07 11:13:22,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:22,230 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-07 11:13:22,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:13:22,230 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-07 11:13:22,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-07 11:13:22,231 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:22,232 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:22,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:22,436 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:22,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:22,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-07 11:13:22,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:22,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481187288] [2020-07-07 11:13:22,438 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:22,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:22,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:22,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:22,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:22,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:22,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:22,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:22,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-07 11:13:22,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481187288] [2020-07-07 11:13:22,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145123567] [2020-07-07 11:13:22,754 INFO L92 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 [2020-07-07 11:13:22,801 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:13:22,801 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:22,803 INFO L264 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-07 11:13:22,807 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-07 11:13:22,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:22,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-07 11:13:22,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259035465] [2020-07-07 11:13:22,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 11:13:22,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:22,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 11:13:22,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:13:22,872 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-07 11:13:23,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:23,064 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-07 11:13:23,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:13:23,065 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-07 11:13:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:23,067 INFO L225 Difference]: With dead ends: 46 [2020-07-07 11:13:23,068 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 11:13:23,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-07-07 11:13:23,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 11:13:23,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-07 11:13:23,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 11:13:23,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-07 11:13:23,099 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-07 11:13:23,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:23,099 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-07 11:13:23,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 11:13:23,100 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-07 11:13:23,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-07 11:13:23,101 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:23,101 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:23,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-07 11:13:23,317 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:23,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:23,318 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-07 11:13:23,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:23,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040285336] [2020-07-07 11:13:23,319 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:23,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-07 11:13:23,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040285336] [2020-07-07 11:13:23,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91471729] [2020-07-07 11:13:23,776 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-07-07 11:13:23,833 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-07-07 11:13:23,834 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:23,835 INFO L264 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-07 11:13:23,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-07 11:13:23,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:23,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-07 11:13:23,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700804959] [2020-07-07 11:13:23,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 11:13:23,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:23,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 11:13:23,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:13:23,882 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-07 11:13:24,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:24,064 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-07 11:13:24,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 11:13:24,065 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-07 11:13:24,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:24,067 INFO L225 Difference]: With dead ends: 49 [2020-07-07 11:13:24,067 INFO L226 Difference]: Without dead ends: 45 [2020-07-07 11:13:24,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-07-07 11:13:24,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-07 11:13:24,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-07 11:13:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 11:13:24,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-07 11:13:24,076 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-07 11:13:24,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:24,077 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-07 11:13:24,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 11:13:24,077 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-07 11:13:24,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-07 11:13:24,079 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:24,079 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:24,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:24,295 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:24,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:24,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-07 11:13:24,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:24,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423327716] [2020-07-07 11:13:24,297 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:24,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:24,842 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-07 11:13:24,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423327716] [2020-07-07 11:13:24,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186275281] [2020-07-07 11:13:24,843 INFO L92 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 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 [2020-07-07 11:13:24,904 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:13:24,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:24,907 INFO L264 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-07 11:13:24,915 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:24,981 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-07 11:13:24,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:24,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-07-07 11:13:24,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424091886] [2020-07-07 11:13:24,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 11:13:24,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:24,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 11:13:24,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:13:24,986 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-07-07 11:13:25,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:25,203 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-07 11:13:25,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:13:25,203 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-07-07 11:13:25,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:25,205 INFO L225 Difference]: With dead ends: 52 [2020-07-07 11:13:25,205 INFO L226 Difference]: Without dead ends: 48 [2020-07-07 11:13:25,207 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-07-07 11:13:25,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-07 11:13:25,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-07 11:13:25,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 11:13:25,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-07 11:13:25,215 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-07 11:13:25,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:25,215 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-07 11:13:25,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 11:13:25,216 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-07 11:13:25,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 11:13:25,217 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:25,217 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:25,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:25,432 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:25,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:25,433 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-07 11:13:25,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:25,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564300502] [2020-07-07 11:13:25,434 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:25,963 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-07 11:13:25,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564300502] [2020-07-07 11:13:25,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477732493] [2020-07-07 11:13:25,965 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2020-07-07 11:13:26,019 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-07-07 11:13:26,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:26,022 INFO L264 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-07 11:13:26,025 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-07 11:13:26,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:26,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-07-07 11:13:26,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380829843] [2020-07-07 11:13:26,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 11:13:26,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:26,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 11:13:26,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:13:26,087 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2020-07-07 11:13:26,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:26,308 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-07 11:13:26,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 11:13:26,309 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-07-07 11:13:26,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:26,311 INFO L225 Difference]: With dead ends: 55 [2020-07-07 11:13:26,311 INFO L226 Difference]: Without dead ends: 51 [2020-07-07 11:13:26,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-07-07 11:13:26,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-07 11:13:26,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-07 11:13:26,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 11:13:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-07 11:13:26,332 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-07 11:13:26,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:26,333 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-07 11:13:26,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 11:13:26,333 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-07 11:13:26,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-07 11:13:26,339 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:26,340 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:26,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-07 11:13:26,541 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:26,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:26,542 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-07-07 11:13:26,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:26,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214679069] [2020-07-07 11:13:26,543 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:26,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:26,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,152 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-07 11:13:27,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214679069] [2020-07-07 11:13:27,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464919221] [2020-07-07 11:13:27,153 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2020-07-07 11:13:27,230 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-07-07 11:13:27,231 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:27,234 INFO L264 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-07 11:13:27,242 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-07 11:13:27,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:27,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-07-07 11:13:27,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863338754] [2020-07-07 11:13:27,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 11:13:27,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:27,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 11:13:27,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:13:27,314 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-07-07 11:13:27,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:27,555 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-07 11:13:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 11:13:27,556 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-07-07 11:13:27,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:27,559 INFO L225 Difference]: With dead ends: 58 [2020-07-07 11:13:27,559 INFO L226 Difference]: Without dead ends: 54 [2020-07-07 11:13:27,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-07-07 11:13:27,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-07 11:13:27,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-07 11:13:27,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 11:13:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-07 11:13:27,586 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-07 11:13:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:27,587 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-07 11:13:27,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 11:13:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-07 11:13:27,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-07 11:13:27,592 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:27,593 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:27,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-07 11:13:27,805 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:27,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:27,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-07-07 11:13:27,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:27,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279854883] [2020-07-07 11:13:27,807 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:27,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-07 11:13:28,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279854883] [2020-07-07 11:13:28,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212273585] [2020-07-07 11:13:28,470 INFO L92 rtionOrderModulation]: Changing assertion order to 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 [2020-07-07 11:13:28,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:28,533 INFO L264 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-07 11:13:28,536 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:28,588 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-07 11:13:28,589 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:28,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-07-07 11:13:28,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553212460] [2020-07-07 11:13:28,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 11:13:28,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:28,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 11:13:28,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:13:28,592 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 19 states. [2020-07-07 11:13:28,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:28,817 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-07 11:13:28,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 11:13:28,818 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-07-07 11:13:28,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:28,819 INFO L225 Difference]: With dead ends: 61 [2020-07-07 11:13:28,820 INFO L226 Difference]: Without dead ends: 57 [2020-07-07 11:13:28,821 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-07-07 11:13:28,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-07 11:13:28,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-07 11:13:28,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:13:28,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-07 11:13:28,830 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-07 11:13:28,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:28,831 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-07 11:13:28,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 11:13:28,831 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-07 11:13:28,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-07 11:13:28,832 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:28,832 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:29,033 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-07 11:13:29,033 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:29,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:29,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-07-07 11:13:29,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:29,035 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273382945] [2020-07-07 11:13:29,035 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-07 11:13:29,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273382945] [2020-07-07 11:13:29,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237162249] [2020-07-07 11:13:29,905 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-07-07 11:13:29,981 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:13:29,982 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:29,986 INFO L264 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-07 11:13:29,991 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:30,043 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-07 11:13:30,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:30,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-07-07 11:13:30,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038883302] [2020-07-07 11:13:30,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 11:13:30,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:30,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 11:13:30,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:13:30,047 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2020-07-07 11:13:30,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:30,319 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-07 11:13:30,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 11:13:30,320 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-07-07 11:13:30,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:30,321 INFO L225 Difference]: With dead ends: 64 [2020-07-07 11:13:30,322 INFO L226 Difference]: Without dead ends: 60 [2020-07-07 11:13:30,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-07-07 11:13:30,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-07 11:13:30,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-07 11:13:30,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-07 11:13:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-07 11:13:30,341 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-07 11:13:30,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:30,343 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-07 11:13:30,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 11:13:30,343 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-07 11:13:30,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-07 11:13:30,345 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:13:30,346 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:13:30,546 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:13:30,547 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:13:30,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:13:30,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-07-07 11:13:30,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:13:30,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265950134] [2020-07-07 11:13:30,550 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:13:30,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:13:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 329 proven. 30 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2020-07-07 11:13:32,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265950134] [2020-07-07 11:13:32,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987797087] [2020-07-07 11:13:32,726 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2020-07-07 11:13:32,822 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-07-07 11:13:32,823 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:13:32,834 INFO L264 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 137 conjunts are in the unsatisfiable core [2020-07-07 11:13:32,839 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:13:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 29 proven. 345 refuted. 0 times theorem prover too weak. 316 trivial. 0 not checked. [2020-07-07 11:13:35,246 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:13:35,246 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 39] total 74 [2020-07-07 11:13:35,247 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988471075] [2020-07-07 11:13:35,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-07-07 11:13:35,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:13:35,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-07-07 11:13:35,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=5032, Unknown=0, NotChecked=0, Total=5402 [2020-07-07 11:13:35,254 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 74 states. [2020-07-07 11:13:39,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:13:39,108 INFO L93 Difference]: Finished difference Result 63 states and 65 transitions. [2020-07-07 11:13:39,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-07-07 11:13:39,109 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 103 [2020-07-07 11:13:39,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:13:39,110 INFO L225 Difference]: With dead ends: 63 [2020-07-07 11:13:39,111 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 11:13:39,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2121 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=902, Invalid=10440, Unknown=0, NotChecked=0, Total=11342 [2020-07-07 11:13:39,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 11:13:39,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 11:13:39,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 11:13:39,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 11:13:39,117 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 103 [2020-07-07 11:13:39,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:13:39,118 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 11:13:39,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-07-07 11:13:39,118 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 11:13:39,118 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 11:13:39,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-07 11:13:39,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 11:13:39,368 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 11:13:39,368 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:13:39,369 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:13:39,369 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 11:13:39,369 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 11:13:39,369 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:13:39,369 INFO L268 CegarLoopResult]: For program point sumEXIT(lines 3 9) no Hoare annotation was computed. [2020-07-07 11:13:39,370 INFO L264 CegarLoopResult]: At program point L7(line 7) the Hoare annotation is: (and (= sum_~m |sum_#in~m|) (= sum_~n |sum_#in~n|) (<= 1 sum_~n)) [2020-07-07 11:13:39,370 INFO L268 CegarLoopResult]: For program point L7-1(line 7) no Hoare annotation was computed. [2020-07-07 11:13:39,370 INFO L268 CegarLoopResult]: For program point L4(lines 4 8) no Hoare annotation was computed. [2020-07-07 11:13:39,370 INFO L268 CegarLoopResult]: For program point sumFINAL(lines 3 9) no Hoare annotation was computed. [2020-07-07 11:13:39,370 INFO L271 CegarLoopResult]: At program point sumENTRY(lines 3 9) the Hoare annotation is: true [2020-07-07 11:13:39,370 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2020-07-07 11:13:39,371 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 11 18) the Hoare annotation is: true [2020-07-07 11:13:39,371 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 11 18) no Hoare annotation was computed. [2020-07-07 11:13:39,371 INFO L268 CegarLoopResult]: For program point L16(line 16) no Hoare annotation was computed. [2020-07-07 11:13:39,371 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-07 11:13:39,371 INFO L264 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: (= 15 main_~a~0) [2020-07-07 11:13:39,371 INFO L268 CegarLoopResult]: For program point L14-1(line 14) no Hoare annotation was computed. [2020-07-07 11:13:39,372 INFO L268 CegarLoopResult]: For program point L15-2(lines 11 18) no Hoare annotation was computed. [2020-07-07 11:13:39,381 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:13:39 BoogieIcfgContainer [2020-07-07 11:13:39,382 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:13:39,385 INFO L168 Benchmark]: Toolchain (without parser) took 23709.25 ms. Allocated memory was 142.6 MB in the beginning and 470.8 MB in the end (delta: 328.2 MB). Free memory was 100.4 MB in the beginning and 390.7 MB in the end (delta: -290.3 MB). Peak memory consumption was 37.9 MB. Max. memory is 7.1 GB. [2020-07-07 11:13:39,386 INFO L168 Benchmark]: CDTParser took 1.57 ms. Allocated memory is still 142.6 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-07 11:13:39,387 INFO L168 Benchmark]: CACSL2BoogieTranslator took 273.94 ms. Allocated memory is still 142.6 MB. Free memory was 100.2 MB in the beginning and 90.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:13:39,388 INFO L168 Benchmark]: Boogie Preprocessor took 34.20 ms. Allocated memory is still 142.6 MB. Free memory was 90.9 MB in the beginning and 89.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-07 11:13:39,389 INFO L168 Benchmark]: RCFGBuilder took 418.33 ms. Allocated memory was 142.6 MB in the beginning and 199.8 MB in the end (delta: 57.1 MB). Free memory was 89.6 MB in the beginning and 167.1 MB in the end (delta: -77.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-07-07 11:13:39,389 INFO L168 Benchmark]: TraceAbstraction took 22972.71 ms. Allocated memory was 199.8 MB in the beginning and 470.8 MB in the end (delta: 271.1 MB). Free memory was 167.1 MB in the beginning and 390.7 MB in the end (delta: -223.6 MB). Peak memory consumption was 47.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:13:39,393 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.57 ms. Allocated memory is still 142.6 MB. Free memory was 118.9 MB in the beginning and 118.7 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 273.94 ms. Allocated memory is still 142.6 MB. Free memory was 100.2 MB in the beginning and 90.9 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 34.20 ms. Allocated memory is still 142.6 MB. Free memory was 90.9 MB in the beginning and 89.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 418.33 ms. Allocated memory was 142.6 MB in the beginning and 199.8 MB in the end (delta: 57.1 MB). Free memory was 89.6 MB in the beginning and 167.1 MB in the end (delta: -77.6 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 22972.71 ms. Allocated memory was 199.8 MB in the beginning and 470.8 MB in the end (delta: 271.1 MB). Free memory was 167.1 MB in the beginning and 390.7 MB in the end (delta: -223.6 MB). Peak memory consumption was 47.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 16]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.8s, OverallIterations: 16, TraceHistogramMax: 16, AutomataDifference: 6.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 207 SDtfs, 511 SDslu, 1615 SDs, 0 SdLazy, 2090 SolverSat, 149 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1559 GetRequests, 1170 SyntacticMatches, 0 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 9.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=15, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 16 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 18 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 11.0s InterpolantComputationTime, 1843 NumberOfCodeBlocks, 1843 NumberOfCodeBlocksAsserted, 97 NumberOfCheckSat, 1812 ConstructedInterpolants, 0 QuantifiedInterpolants, 414750 SizeOfPredicates, 154 NumberOfNonLiveVariables, 2700 ConjunctsInSsa, 403 ConjunctsInUnsatCore, 31 InterpolantComputations, 1 PerfectInterpolantSequences, 4155/7680 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...