/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 --traceabstraction.assert.codeblocks.term.scoring.heuristic BIGGEST_EQUIVALENCE_CLASS --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 4 --traceabstraction.trace.refinement.strategy CAMEL_SMT_AM -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/Ackermann03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 05:29:05,842 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 05:29:05,844 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 05:29:05,863 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 05:29:05,863 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 05:29:05,866 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 05:29:05,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 05:29:05,879 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 05:29:05,881 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 05:29:05,884 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 05:29:05,884 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 05:29:05,885 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 05:29:05,886 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 05:29:05,887 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 05:29:05,888 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 05:29:05,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 05:29:05,891 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 05:29:05,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 05:29:05,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 05:29:05,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 05:29:05,901 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 05:29:05,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 05:29:05,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 05:29:05,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 05:29:05,911 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-20 05:29:05,911 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-20 05:29:05,911 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-20 05:29:05,914 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-20 05:29:05,914 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-20 05:29:05,916 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-20 05:29:05,917 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-20 05:29:05,918 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-20 05:29:05,919 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-20 05:29:05,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-20 05:29:05,923 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-20 05:29:05,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-20 05:29:05,924 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-20 05:29:05,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-20 05:29:05,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 05:29:05,926 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 05:29:05,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 05:29:05,928 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 [2020-07-20 05:29:05,952 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 05:29:05,952 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 05:29:05,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 05:29:05,955 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 05:29:05,955 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 05:29:05,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 05:29:05,955 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 05:29:05,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 05:29:05,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 05:29:05,956 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 05:29:05,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 05:29:05,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 05:29:05,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 05:29:05,958 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 05:29:05,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 05:29:05,958 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 05:29:05,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 05:29:05,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 05:29:05,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 05:29:05,959 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 05:29:05,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 05:29:05,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 05:29:05,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 05:29:05,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 05:29:05,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 05:29:05,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 05:29:05,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 05:29:05,960 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 05:29:05,961 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 05:29:05,961 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> BIGGEST_EQUIVALENCE_CLASS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> CAMEL_SMT_AM [2020-07-20 05:29:06,271 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 05:29:06,283 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 05:29:06,287 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 05:29:06,288 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 05:29:06,289 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 05:29:06,289 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-20 05:29:06,351 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/680cfa76a/ce0fce2491974c87865982aed4a61dfa/FLAG3378fe863 [2020-07-20 05:29:06,834 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 05:29:06,835 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive/Ackermann03.c [2020-07-20 05:29:06,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/680cfa76a/ce0fce2491974c87865982aed4a61dfa/FLAG3378fe863 [2020-07-20 05:29:07,255 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/680cfa76a/ce0fce2491974c87865982aed4a61dfa [2020-07-20 05:29:07,262 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 05:29:07,265 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 05:29:07,266 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 05:29:07,266 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 05:29:07,269 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 05:29:07,270 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:29:07" (1/1) ... [2020-07-20 05:29:07,273 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f24acd0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:07, skipping insertion in model container [2020-07-20 05:29:07,273 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 05:29:07" (1/1) ... [2020-07-20 05:29:07,280 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 05:29:07,293 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 05:29:07,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:29:07,495 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 05:29:07,509 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 05:29:07,522 INFO L208 MainTranslator]: Completed translation [2020-07-20 05:29:07,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:07 WrapperNode [2020-07-20 05:29:07,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 05:29:07,523 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 05:29:07,524 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 05:29:07,524 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 05:29:07,535 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:07" (1/1) ... [2020-07-20 05:29:07,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:07" (1/1) ... [2020-07-20 05:29:07,540 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:07" (1/1) ... [2020-07-20 05:29:07,541 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:07" (1/1) ... [2020-07-20 05:29:07,544 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:07" (1/1) ... [2020-07-20 05:29:07,547 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:07" (1/1) ... [2020-07-20 05:29:07,548 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:07" (1/1) ... [2020-07-20 05:29:07,549 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 05:29:07,550 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 05:29:07,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 05:29:07,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 05:29:07,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:07" (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 [2020-07-20 05:29:07,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 05:29:07,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 05:29:07,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2020-07-20 05:29:07,675 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 05:29:07,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 05:29:07,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 05:29:07,675 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2020-07-20 05:29:07,676 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 05:29:07,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 05:29:07,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 05:29:07,869 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 05:29:07,869 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 05:29:07,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:29:07 BoogieIcfgContainer [2020-07-20 05:29:07,874 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 05:29:07,875 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 05:29:07,876 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 05:29:07,879 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 05:29:07,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 05:29:07" (1/3) ... [2020-07-20 05:29:07,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78951041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:29:07, skipping insertion in model container [2020-07-20 05:29:07,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 05:29:07" (2/3) ... [2020-07-20 05:29:07,881 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78951041 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 05:29:07, skipping insertion in model container [2020-07-20 05:29:07,881 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 05:29:07" (3/3) ... [2020-07-20 05:29:07,883 INFO L109 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2020-07-20 05:29:07,893 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 05:29:07,902 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 05:29:07,921 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 05:29:07,952 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 05:29:07,953 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 05:29:07,953 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 05:29:07,953 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 05:29:07,956 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 05:29:07,956 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 05:29:07,956 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 05:29:07,957 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 05:29:07,985 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-07-20 05:29:07,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-07-20 05:29:07,995 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:07,996 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:29:07,997 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:08,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:08,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1796234678, now seen corresponding path program 1 times [2020-07-20 05:29:08,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:08,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428276915] [2020-07-20 05:29:08,015 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@571594 [2020-07-20 05:29:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:08,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-20 05:29:08,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428276915] [2020-07-20 05:29:08,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 05:29:08,239 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 05:29:08,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237878034] [2020-07-20 05:29:08,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 05:29:08,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:08,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 05:29:08,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 05:29:08,263 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 5 states. [2020-07-20 05:29:08,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:08,407 INFO L93 Difference]: Finished difference Result 55 states and 77 transitions. [2020-07-20 05:29:08,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 05:29:08,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-07-20 05:29:08,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:08,420 INFO L225 Difference]: With dead ends: 55 [2020-07-20 05:29:08,421 INFO L226 Difference]: Without dead ends: 28 [2020-07-20 05:29:08,425 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 [2020-07-20 05:29:08,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-20 05:29:08,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-20 05:29:08,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-20 05:29:08,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2020-07-20 05:29:08,476 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 15 [2020-07-20 05:29:08,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:08,476 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2020-07-20 05:29:08,477 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 05:29:08,477 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2020-07-20 05:29:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-07-20 05:29:08,480 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:08,480 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:29:08,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 05:29:08,481 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:08,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:08,481 INFO L82 PathProgramCache]: Analyzing trace with hash -895156504, now seen corresponding path program 1 times [2020-07-20 05:29:08,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:08,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205357230] [2020-07-20 05:29:08,483 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@571594 [2020-07-20 05:29:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:08,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:08,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-07-20 05:29:08,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205357230] [2020-07-20 05:29:08,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244223546] [2020-07-20 05:29:08,589 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63c3ba4c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:08,650 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63c3ba4c issued 2 check-sat command(s) [2020-07-20 05:29:08,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:08,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 05:29:08,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:08,744 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-20 05:29:08,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:08,745 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2020-07-20 05:29:08,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164843210] [2020-07-20 05:29:08,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 05:29:08,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:08,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 05:29:08,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-07-20 05:29:08,749 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand 9 states. [2020-07-20 05:29:09,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:09,038 INFO L93 Difference]: Finished difference Result 64 states and 104 transitions. [2020-07-20 05:29:09,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 05:29:09,039 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-07-20 05:29:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:09,042 INFO L225 Difference]: With dead ends: 64 [2020-07-20 05:29:09,042 INFO L226 Difference]: Without dead ends: 38 [2020-07-20 05:29:09,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:29:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-20 05:29:09,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-20 05:29:09,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-20 05:29:09,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 57 transitions. [2020-07-20 05:29:09,059 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 57 transitions. Word has length 22 [2020-07-20 05:29:09,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:09,059 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 57 transitions. [2020-07-20 05:29:09,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 05:29:09,060 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 57 transitions. [2020-07-20 05:29:09,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-07-20 05:29:09,064 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:09,064 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:29:09,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 05:29:09,279 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:09,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:09,280 INFO L82 PathProgramCache]: Analyzing trace with hash 564623689, now seen corresponding path program 1 times [2020-07-20 05:29:09,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:09,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068663466] [2020-07-20 05:29:09,282 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@571594 [2020-07-20 05:29:09,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:09,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:09,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:09,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:09,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:09,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:09,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:09,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:09,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 95 proven. 63 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2020-07-20 05:29:09,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068663466] [2020-07-20 05:29:09,686 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781305878] [2020-07-20 05:29:09,687 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7ed4efc0 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 [2020-07-20 05:29:09,758 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7ed4efc0 issued 2 check-sat command(s) [2020-07-20 05:29:09,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:09,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 05:29:09,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 120 proven. 20 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-07-20 05:29:09,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:09,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2020-07-20 05:29:09,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842044544] [2020-07-20 05:29:09,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 05:29:09,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:09,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 05:29:09,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-07-20 05:29:09,875 INFO L87 Difference]: Start difference. First operand 38 states and 57 transitions. Second operand 13 states. [2020-07-20 05:29:10,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:10,352 INFO L93 Difference]: Finished difference Result 101 states and 230 transitions. [2020-07-20 05:29:10,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 05:29:10,353 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 82 [2020-07-20 05:29:10,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:10,356 INFO L225 Difference]: With dead ends: 101 [2020-07-20 05:29:10,356 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 05:29:10,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2020-07-20 05:29:10,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 05:29:10,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 05:29:10,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 05:29:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-07-20 05:29:10,371 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 82 [2020-07-20 05:29:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:10,372 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-07-20 05:29:10,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 05:29:10,372 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-07-20 05:29:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-20 05:29:10,374 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:10,374 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:29:10,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:10,590 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:10,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:10,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1732137516, now seen corresponding path program 2 times [2020-07-20 05:29:10,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:10,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893162766] [2020-07-20 05:29:10,591 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@571594 [2020-07-20 05:29:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:10,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:10,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:10,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:10,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:10,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:10,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:10,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 54 proven. 29 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2020-07-20 05:29:10,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893162766] [2020-07-20 05:29:10,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294045405] [2020-07-20 05:29:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7230d5ff No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:10,874 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7230d5ff issued 3 check-sat command(s) [2020-07-20 05:29:10,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:10,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 05:29:10,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:10,966 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-07-20 05:29:10,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:10,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 6] total 18 [2020-07-20 05:29:10,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845454272] [2020-07-20 05:29:10,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 05:29:10,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:10,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 05:29:10,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2020-07-20 05:29:10,970 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 18 states. [2020-07-20 05:29:11,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:11,685 INFO L93 Difference]: Finished difference Result 107 states and 147 transitions. [2020-07-20 05:29:11,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 05:29:11,685 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 62 [2020-07-20 05:29:11,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:11,688 INFO L225 Difference]: With dead ends: 107 [2020-07-20 05:29:11,688 INFO L226 Difference]: Without dead ends: 70 [2020-07-20 05:29:11,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=1317, Unknown=0, NotChecked=0, Total=1640 [2020-07-20 05:29:11,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-07-20 05:29:11,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-07-20 05:29:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-07-20 05:29:11,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 81 transitions. [2020-07-20 05:29:11,701 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 81 transitions. Word has length 62 [2020-07-20 05:29:11,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:11,702 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 81 transitions. [2020-07-20 05:29:11,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 05:29:11,702 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 81 transitions. [2020-07-20 05:29:11,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-07-20 05:29:11,705 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:11,705 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 11, 8, 7, 7, 7, 7, 7, 7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:29:11,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:11,920 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:11,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:11,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1835077495, now seen corresponding path program 3 times [2020-07-20 05:29:11,921 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:11,921 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799524561] [2020-07-20 05:29:11,922 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@571594 [2020-07-20 05:29:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:12,419 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 153 proven. 289 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2020-07-20 05:29:12,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799524561] [2020-07-20 05:29:12,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247732196] [2020-07-20 05:29:12,421 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@42cabbbc 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 [2020-07-20 05:29:12,519 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@42cabbbc issued 4 check-sat command(s) [2020-07-20 05:29:12,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:12,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 21 conjunts are in the unsatisfiable core [2020-07-20 05:29:12,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 475 proven. 114 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2020-07-20 05:29:12,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:12,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 18 [2020-07-20 05:29:12,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430114009] [2020-07-20 05:29:12,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 05:29:12,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:12,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 05:29:12,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2020-07-20 05:29:12,601 INFO L87 Difference]: Start difference. First operand 67 states and 81 transitions. Second operand 18 states. [2020-07-20 05:29:13,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:13,365 INFO L93 Difference]: Finished difference Result 125 states and 154 transitions. [2020-07-20 05:29:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-07-20 05:29:13,365 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 134 [2020-07-20 05:29:13,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:13,368 INFO L225 Difference]: With dead ends: 125 [2020-07-20 05:29:13,369 INFO L226 Difference]: Without dead ends: 80 [2020-07-20 05:29:13,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=1446, Unknown=0, NotChecked=0, Total=1806 [2020-07-20 05:29:13,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-07-20 05:29:13,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 72. [2020-07-20 05:29:13,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 05:29:13,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2020-07-20 05:29:13,382 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 134 [2020-07-20 05:29:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:13,382 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2020-07-20 05:29:13,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 05:29:13,382 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2020-07-20 05:29:13,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-20 05:29:13,385 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:13,386 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:29:13,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:13,601 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:13,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1434361927, now seen corresponding path program 4 times [2020-07-20 05:29:13,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:13,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980490278] [2020-07-20 05:29:13,603 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@571594 [2020-07-20 05:29:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:13,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:13,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:13,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:13,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:13,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:13,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:14,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:14,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:14,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:14,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:14,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 446 proven. 274 refuted. 0 times theorem prover too weak. 526 trivial. 0 not checked. [2020-07-20 05:29:14,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980490278] [2020-07-20 05:29:14,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975558853] [2020-07-20 05:29:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@23b476fe No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:14,374 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@23b476fe issued 4 check-sat command(s) [2020-07-20 05:29:14,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:14,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 35 conjunts are in the unsatisfiable core [2020-07-20 05:29:14,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2020-07-20 05:29:14,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:14,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 24 [2020-07-20 05:29:14,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880977589] [2020-07-20 05:29:14,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 05:29:14,538 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:14,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 05:29:14,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2020-07-20 05:29:14,539 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand 24 states. [2020-07-20 05:29:15,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:15,481 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2020-07-20 05:29:15,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-07-20 05:29:15,483 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 160 [2020-07-20 05:29:15,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:15,488 INFO L225 Difference]: With dead ends: 137 [2020-07-20 05:29:15,488 INFO L226 Difference]: Without dead ends: 93 [2020-07-20 05:29:15,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=2470, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 05:29:15,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-20 05:29:15,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-07-20 05:29:15,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-07-20 05:29:15,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2020-07-20 05:29:15,503 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 160 [2020-07-20 05:29:15,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:15,504 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2020-07-20 05:29:15,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 05:29:15,504 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2020-07-20 05:29:15,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-07-20 05:29:15,507 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:15,507 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:29:15,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 05:29:15,721 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:15,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:15,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1028004289, now seen corresponding path program 5 times [2020-07-20 05:29:15,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:15,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091205242] [2020-07-20 05:29:15,723 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@571594 [2020-07-20 05:29:15,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:15,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:15,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:15,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:15,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:15,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:16,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:16,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:16,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:16,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:16,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 600 proven. 156 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2020-07-20 05:29:16,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091205242] [2020-07-20 05:29:16,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864988376] [2020-07-20 05:29:16,665 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@782d138 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 [2020-07-20 05:29:16,765 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@782d138 issued 4 check-sat command(s) [2020-07-20 05:29:16,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:16,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 79 conjunts are in the unsatisfiable core [2020-07-20 05:29:16,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2020-07-20 05:29:17,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:17,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 25 [2020-07-20 05:29:17,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669984082] [2020-07-20 05:29:17,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 05:29:17,023 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:17,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 05:29:17,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=550, Unknown=0, NotChecked=0, Total=600 [2020-07-20 05:29:17,024 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand 25 states. [2020-07-20 05:29:18,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:18,819 INFO L93 Difference]: Finished difference Result 134 states and 177 transitions. [2020-07-20 05:29:18,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-07-20 05:29:18,819 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 186 [2020-07-20 05:29:18,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:18,822 INFO L225 Difference]: With dead ends: 134 [2020-07-20 05:29:18,822 INFO L226 Difference]: Without dead ends: 127 [2020-07-20 05:29:18,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 241 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=255, Invalid=2715, Unknown=0, NotChecked=0, Total=2970 [2020-07-20 05:29:18,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-07-20 05:29:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 99. [2020-07-20 05:29:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-07-20 05:29:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 134 transitions. [2020-07-20 05:29:18,842 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 134 transitions. Word has length 186 [2020-07-20 05:29:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:18,842 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 134 transitions. [2020-07-20 05:29:18,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 05:29:18,843 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 134 transitions. [2020-07-20 05:29:18,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-07-20 05:29:18,845 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:18,845 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:29:19,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:19,052 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:19,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:19,053 INFO L82 PathProgramCache]: Analyzing trace with hash -66876812, now seen corresponding path program 6 times [2020-07-20 05:29:19,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:19,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156512225] [2020-07-20 05:29:19,054 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@571594 [2020-07-20 05:29:19,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:19,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 503 proven. 360 refuted. 0 times theorem prover too weak. 620 trivial. 0 not checked. [2020-07-20 05:29:19,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156512225] [2020-07-20 05:29:19,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434578140] [2020-07-20 05:29:19,655 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e7feb0c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:19,780 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4e7feb0c issued 4 check-sat command(s) [2020-07-20 05:29:19,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:19,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 37 conjunts are in the unsatisfiable core [2020-07-20 05:29:19,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:19,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2020-07-20 05:29:19,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:19,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 25 [2020-07-20 05:29:19,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101858583] [2020-07-20 05:29:19,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 05:29:19,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:19,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 05:29:19,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2020-07-20 05:29:19,874 INFO L87 Difference]: Start difference. First operand 99 states and 134 transitions. Second operand 25 states. [2020-07-20 05:29:20,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:20,869 INFO L93 Difference]: Finished difference Result 206 states and 280 transitions. [2020-07-20 05:29:20,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-07-20 05:29:20,870 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 173 [2020-07-20 05:29:20,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:20,872 INFO L225 Difference]: With dead ends: 206 [2020-07-20 05:29:20,872 INFO L226 Difference]: Without dead ends: 135 [2020-07-20 05:29:20,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 227 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=619, Invalid=3041, Unknown=0, NotChecked=0, Total=3660 [2020-07-20 05:29:20,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-20 05:29:20,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 96. [2020-07-20 05:29:20,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-20 05:29:20,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 127 transitions. [2020-07-20 05:29:20,891 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 127 transitions. Word has length 173 [2020-07-20 05:29:20,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:20,892 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 127 transitions. [2020-07-20 05:29:20,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 05:29:20,892 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 127 transitions. [2020-07-20 05:29:20,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-07-20 05:29:20,895 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:20,895 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:29:21,108 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:21,109 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:21,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:21,110 INFO L82 PathProgramCache]: Analyzing trace with hash -2090243986, now seen corresponding path program 7 times [2020-07-20 05:29:21,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:21,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138186774] [2020-07-20 05:29:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@571594 [2020-07-20 05:29:21,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:21,862 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 665 proven. 517 refuted. 0 times theorem prover too weak. 838 trivial. 0 not checked. [2020-07-20 05:29:21,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138186774] [2020-07-20 05:29:21,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92942369] [2020-07-20 05:29:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b74caf1 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 [2020-07-20 05:29:22,007 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@b74caf1 issued 4 check-sat command(s) [2020-07-20 05:29:22,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:22,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 41 conjunts are in the unsatisfiable core [2020-07-20 05:29:22,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:22,175 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2020-07-20 05:29:22,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:22,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23] total 27 [2020-07-20 05:29:22,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702689493] [2020-07-20 05:29:22,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-20 05:29:22,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:22,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-20 05:29:22,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=604, Unknown=0, NotChecked=0, Total=702 [2020-07-20 05:29:22,181 INFO L87 Difference]: Start difference. First operand 96 states and 127 transitions. Second operand 27 states. [2020-07-20 05:29:23,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:23,051 INFO L93 Difference]: Finished difference Result 210 states and 273 transitions. [2020-07-20 05:29:23,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-07-20 05:29:23,052 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 199 [2020-07-20 05:29:23,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:23,054 INFO L225 Difference]: With dead ends: 210 [2020-07-20 05:29:23,055 INFO L226 Difference]: Without dead ends: 137 [2020-07-20 05:29:23,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 261 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=2213, Unknown=0, NotChecked=0, Total=2652 [2020-07-20 05:29:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-07-20 05:29:23,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2020-07-20 05:29:23,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-07-20 05:29:23,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 132 transitions. [2020-07-20 05:29:23,073 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 132 transitions. Word has length 199 [2020-07-20 05:29:23,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:23,074 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 132 transitions. [2020-07-20 05:29:23,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-20 05:29:23,074 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 132 transitions. [2020-07-20 05:29:23,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-07-20 05:29:23,077 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:23,077 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 17, 14, 13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:29:23,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 05:29:23,293 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:23,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:23,294 INFO L82 PathProgramCache]: Analyzing trace with hash 469178039, now seen corresponding path program 8 times [2020-07-20 05:29:23,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:23,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435556030] [2020-07-20 05:29:23,295 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@571594 [2020-07-20 05:29:23,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:23,866 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 268 proven. 783 refuted. 0 times theorem prover too weak. 1269 trivial. 0 not checked. [2020-07-20 05:29:23,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435556030] [2020-07-20 05:29:23,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565658516] [2020-07-20 05:29:23,867 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4ed2f1dd No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:23,957 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4ed2f1dd issued 3 check-sat command(s) [2020-07-20 05:29:23,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:23,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 25 conjunts are in the unsatisfiable core [2020-07-20 05:29:23,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:24,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1340 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-07-20 05:29:24,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:24,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 20 [2020-07-20 05:29:24,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711544920] [2020-07-20 05:29:24,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 05:29:24,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:24,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 05:29:24,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2020-07-20 05:29:24,051 INFO L87 Difference]: Start difference. First operand 101 states and 132 transitions. Second operand 20 states. [2020-07-20 05:29:24,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:24,578 INFO L93 Difference]: Finished difference Result 178 states and 230 transitions. [2020-07-20 05:29:24,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 05:29:24,579 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 212 [2020-07-20 05:29:24,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:24,581 INFO L225 Difference]: With dead ends: 178 [2020-07-20 05:29:24,581 INFO L226 Difference]: Without dead ends: 107 [2020-07-20 05:29:24,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=248, Invalid=1084, Unknown=0, NotChecked=0, Total=1332 [2020-07-20 05:29:24,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-07-20 05:29:24,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 96. [2020-07-20 05:29:24,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-07-20 05:29:24,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2020-07-20 05:29:24,595 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 212 [2020-07-20 05:29:24,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:24,595 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2020-07-20 05:29:24,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 05:29:24,596 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2020-07-20 05:29:24,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2020-07-20 05:29:24,597 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 05:29:24,598 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 23, 19, 18, 18, 18, 18, 18, 18, 18, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 05:29:24,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:24,811 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 05:29:24,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 05:29:24,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024914, now seen corresponding path program 9 times [2020-07-20 05:29:24,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 05:29:24,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429757398] [2020-07-20 05:29:24,813 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@571594 [2020-07-20 05:29:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:24,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 05:29:25,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 228 proven. 513 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2020-07-20 05:29:25,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429757398] [2020-07-20 05:29:25,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970920622] [2020-07-20 05:29:25,470 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@12d70534 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 [2020-07-20 05:29:25,582 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@12d70534 issued 3 check-sat command(s) [2020-07-20 05:29:25,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 05:29:25,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 726 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 05:29:25,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 05:29:25,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 507 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2020-07-20 05:29:25,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 05:29:25,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-20 05:29:25,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033556449] [2020-07-20 05:29:25,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 05:29:25,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 05:29:25,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 05:29:25,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-07-20 05:29:25,678 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand 10 states. [2020-07-20 05:29:25,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 05:29:25,825 INFO L93 Difference]: Finished difference Result 99 states and 122 transitions. [2020-07-20 05:29:25,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 05:29:25,826 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 284 [2020-07-20 05:29:25,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 05:29:25,827 INFO L225 Difference]: With dead ends: 99 [2020-07-20 05:29:25,828 INFO L226 Difference]: Without dead ends: 0 [2020-07-20 05:29:25,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 368 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-07-20 05:29:25,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-20 05:29:25,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-20 05:29:25,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-20 05:29:25,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-20 05:29:25,830 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 284 [2020-07-20 05:29:25,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 05:29:25,830 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-20 05:29:25,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 05:29:25,830 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-20 05:29:25,830 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-20 05:29:26,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 05:29:26,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-20 05:29:27,693 WARN L193 SmtUtils]: Spent 963.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 57 [2020-07-20 05:29:27,808 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 12 [2020-07-20 05:29:27,836 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-20 05:29:27,836 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:29:27,837 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-20 05:29:27,837 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-20 05:29:27,837 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-20 05:29:27,837 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-20 05:29:27,837 INFO L268 CegarLoopResult]: For program point ackermannEXIT(lines 14 22) no Hoare annotation was computed. [2020-07-20 05:29:27,837 INFO L271 CegarLoopResult]: At program point ackermannENTRY(lines 14 22) the Hoare annotation is: true [2020-07-20 05:29:27,838 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (or (not (<= 0 |ackermann_#in~m|)) (<= 1 |ackermann_#in~m|))) [2020-07-20 05:29:27,838 INFO L268 CegarLoopResult]: For program point L21-1(line 21) no Hoare annotation was computed. [2020-07-20 05:29:27,838 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (= ackermann_~n |ackermann_#in~n|) (not (= 0 |ackermann_#in~m|)) (= 0 |ackermann_#in~n|)) [2020-07-20 05:29:27,838 INFO L264 CegarLoopResult]: At program point L21-2(line 21) the Hoare annotation is: (let ((.cse0 (= ackermann_~m |ackermann_#in~m|)) (.cse1 (= ackermann_~n |ackermann_#in~n|))) (let ((.cse8 (and (<= 3 |ackermann_#in~m|) .cse0 .cse1)) (.cse9 (<= |ackermann_#t~ret1| 5)) (.cse5 (<= 3 |ackermann_#t~ret1|)) (.cse6 (<= |ackermann_#t~ret1| 3)) (.cse7 (<= |ackermann_#in~m| 1)) (.cse4 (<= |ackermann_#in~n| 1)) (.cse2 (<= 5 |ackermann_#t~ret1|)) (.cse3 (<= 3 |ackermann_#in~n|))) (and (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse5 .cse0 .cse6 .cse1) .cse7 .cse8 (and .cse0 .cse9 .cse1 .cse2 (<= 2 |ackermann_#in~n|))) (or (not (<= |ackermann_#in~n| 0)) .cse8) (or (<= 2 |ackermann_#in~m|) (not .cse4) (<= |ackermann_#t~ret1| 2)) (let ((.cse10 (<= 1 |ackermann_#in~m|))) (or (and (<= 4 |ackermann_#in~n|) (<= |ackermann_#in~n| 4) .cse0 .cse9 .cse1 .cse2 .cse10) (and .cse5 .cse0 .cse6 .cse1 (<= |ackermann_#in~n| 2) .cse10) (not .cse7) (and .cse4 .cse0 .cse1 (<= 2 |ackermann_#t~ret1|) .cse10) (and (<= 6 |ackermann_#in~n|) .cse0 .cse1 .cse2 .cse10) (and .cse0 .cse1 (<= 5 |ackermann_#in~n|) (<= |ackermann_#t~ret1| 6) .cse10 (<= 6 |ackermann_#t~ret1|)) (and .cse0 .cse1 (<= |ackermann_#t~ret1| 4) .cse3 .cse10 (<= |ackermann_#in~n| 3) (<= 4 |ackermann_#t~ret1|))))))) [2020-07-20 05:29:27,839 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-07-20 05:29:27,839 INFO L268 CegarLoopResult]: For program point L19-1(line 19) no Hoare annotation was computed. [2020-07-20 05:29:27,839 INFO L268 CegarLoopResult]: For program point L21-3(line 21) no Hoare annotation was computed. [2020-07-20 05:29:27,839 INFO L268 CegarLoopResult]: For program point L15(lines 15 17) no Hoare annotation was computed. [2020-07-20 05:29:27,839 INFO L268 CegarLoopResult]: For program point ackermannFINAL(lines 14 22) no Hoare annotation was computed. [2020-07-20 05:29:27,840 INFO L268 CegarLoopResult]: For program point L33(lines 33 38) no Hoare annotation was computed. [2020-07-20 05:29:27,840 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 43) no Hoare annotation was computed. [2020-07-20 05:29:27,840 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 25 45) the Hoare annotation is: true [2020-07-20 05:29:27,840 INFO L268 CegarLoopResult]: For program point L27(lines 27 31) no Hoare annotation was computed. [2020-07-20 05:29:27,840 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 25 45) no Hoare annotation was computed. [2020-07-20 05:29:27,840 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 25 45) no Hoare annotation was computed. [2020-07-20 05:29:27,841 INFO L268 CegarLoopResult]: For program point L43(line 43) no Hoare annotation was computed. [2020-07-20 05:29:27,842 INFO L268 CegarLoopResult]: For program point L40(lines 40 44) no Hoare annotation was computed. [2020-07-20 05:29:27,842 INFO L271 CegarLoopResult]: At program point L39(line 39) the Hoare annotation is: true [2020-07-20 05:29:27,842 INFO L268 CegarLoopResult]: For program point L39-1(line 39) no Hoare annotation was computed. [2020-07-20 05:29:27,849 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 05:29:27 BoogieIcfgContainer [2020-07-20 05:29:27,850 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 05:29:27,852 INFO L168 Benchmark]: Toolchain (without parser) took 20587.78 ms. Allocated memory was 140.0 MB in the beginning and 513.8 MB in the end (delta: 373.8 MB). Free memory was 103.2 MB in the beginning and 109.0 MB in the end (delta: -5.8 MB). Peak memory consumption was 368.1 MB. Max. memory is 7.1 GB. [2020-07-20 05:29:27,853 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-20 05:29:27,854 INFO L168 Benchmark]: CACSL2BoogieTranslator took 257.49 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 93.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-07-20 05:29:27,861 INFO L168 Benchmark]: Boogie Preprocessor took 25.86 ms. Allocated memory is still 140.0 MB. Free memory was 93.4 MB in the beginning and 92.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 05:29:27,867 INFO L168 Benchmark]: RCFGBuilder took 324.28 ms. Allocated memory was 140.0 MB in the beginning and 201.3 MB in the end (delta: 61.3 MB). Free memory was 92.0 MB in the beginning and 167.9 MB in the end (delta: -75.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-07-20 05:29:27,867 INFO L168 Benchmark]: TraceAbstraction took 19974.55 ms. Allocated memory was 201.3 MB in the beginning and 513.8 MB in the end (delta: 312.5 MB). Free memory was 167.3 MB in the beginning and 109.0 MB in the end (delta: 58.3 MB). Peak memory consumption was 370.8 MB. Max. memory is 7.1 GB. [2020-07-20 05:29:27,871 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.0 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 257.49 ms. Allocated memory is still 140.0 MB. Free memory was 103.0 MB in the beginning and 93.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.86 ms. Allocated memory is still 140.0 MB. Free memory was 93.4 MB in the beginning and 92.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 324.28 ms. Allocated memory was 140.0 MB in the beginning and 201.3 MB in the end (delta: 61.3 MB). Free memory was 92.0 MB in the beginning and 167.9 MB in the end (delta: -75.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19974.55 ms. Allocated memory was 201.3 MB in the beginning and 513.8 MB in the end (delta: 312.5 MB). Free memory was 167.3 MB in the beginning and 109.0 MB in the end (delta: 58.3 MB). Peak memory consumption was 370.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 43]: 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, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 18.0s, OverallIterations: 11, TraceHistogramMax: 42, AutomataDifference: 7.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 1.7s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 349 SDtfs, 441 SDslu, 2206 SDs, 0 SdLazy, 5089 SolverSat, 914 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2359 GetRequests, 1973 SyntacticMatches, 6 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3610 ImplicationChecksByTransitivity, 5.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 11 MinimizatonAttempts, 141 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 9 LocationsWithAnnotation, 381 PreInvPairs, 584 NumberOfFragments, 240 HoareAnnotationTreeSize, 381 FomulaSimplifications, 49850 FormulaSimplificationTreeSizeReduction, 0.5s HoareSimplificationTime, 9 FomulaSimplificationsInter, 4009 FormulaSimplificationTreeSizeReductionInter, 1.2s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 6.1s InterpolantComputationTime, 3043 NumberOfCodeBlocks, 2855 NumberOfCodeBlocksAsserted, 44 NumberOfCheckSat, 3022 ConstructedInterpolants, 0 QuantifiedInterpolants, 1004584 SizeOfPredicates, 85 NumberOfNonLiveVariables, 4176 ConjunctsInSsa, 272 ConjunctsInUnsatCore, 21 InterpolantComputations, 1 PerfectInterpolantSequences, 23563/28750 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...