/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 DAGSIZE --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-simple/id_i20_o20-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-20 03:35:19,895 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-20 03:35:19,897 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-20 03:35:19,915 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-20 03:35:19,916 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-20 03:35:19,917 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-20 03:35:19,918 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-20 03:35:19,920 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-20 03:35:19,922 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-20 03:35:19,923 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-20 03:35:19,924 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-20 03:35:19,925 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-20 03:35:19,925 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-20 03:35:19,926 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-20 03:35:19,927 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-20 03:35:19,928 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-20 03:35:19,929 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-20 03:35:19,930 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-20 03:35:19,932 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-20 03:35:19,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-20 03:35:19,935 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-20 03:35:19,936 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-20 03:35:19,938 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-20 03:35:19,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-20 03:35:19,941 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-20 03:35:19,949 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-20 03:35:19,950 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-20 03:35:19,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-20 03:35:19,952 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 03:35:19,967 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-20 03:35:19,967 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-20 03:35:19,968 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-20 03:35:19,968 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-20 03:35:19,969 INFO L138 SettingsManager]: * Use SBE=true [2020-07-20 03:35:19,969 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-20 03:35:19,969 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-20 03:35:19,969 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-20 03:35:19,970 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-20 03:35:19,970 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-20 03:35:19,970 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-20 03:35:19,970 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-20 03:35:19,970 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-20 03:35:19,971 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-20 03:35:19,971 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-20 03:35:19,971 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-20 03:35:19,971 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-20 03:35:19,971 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-20 03:35:19,972 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-20 03:35:19,972 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-20 03:35:19,972 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-20 03:35:19,972 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-20 03:35:19,972 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-20 03:35:19,973 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-20 03:35:19,973 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-20 03:35:19,973 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-20 03:35:19,973 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-20 03:35:19,973 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-20 03:35:19,973 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-20 03:35:19,974 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> DAGSIZE 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 03:35:20,248 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-20 03:35:20,262 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-20 03:35:20,266 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-20 03:35:20,267 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-20 03:35:20,268 INFO L275 PluginConnector]: CDTParser initialized [2020-07-20 03:35:20,269 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c [2020-07-20 03:35:20,334 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95389e9f3/544e8ae7e0184769b4849c470c340fc6/FLAGc86477a1b [2020-07-20 03:35:20,770 INFO L306 CDTParser]: Found 1 translation units. [2020-07-20 03:35:20,771 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i20_o20-2.c [2020-07-20 03:35:20,778 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95389e9f3/544e8ae7e0184769b4849c470c340fc6/FLAGc86477a1b [2020-07-20 03:35:21,212 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95389e9f3/544e8ae7e0184769b4849c470c340fc6 [2020-07-20 03:35:21,221 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-20 03:35:21,224 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-20 03:35:21,226 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-20 03:35:21,226 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-20 03:35:21,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-20 03:35:21,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:35:21" (1/1) ... [2020-07-20 03:35:21,238 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48ebf41a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:21, skipping insertion in model container [2020-07-20 03:35:21,239 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 03:35:21" (1/1) ... [2020-07-20 03:35:21,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-20 03:35:21,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-20 03:35:21,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:35:21,439 INFO L203 MainTranslator]: Completed pre-run [2020-07-20 03:35:21,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-20 03:35:21,469 INFO L208 MainTranslator]: Completed translation [2020-07-20 03:35:21,469 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:21 WrapperNode [2020-07-20 03:35:21,469 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-20 03:35:21,470 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-20 03:35:21,470 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-20 03:35:21,470 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-20 03:35:21,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:21" (1/1) ... [2020-07-20 03:35:21,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:21" (1/1) ... [2020-07-20 03:35:21,486 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:21" (1/1) ... [2020-07-20 03:35:21,486 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:21" (1/1) ... [2020-07-20 03:35:21,490 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:21" (1/1) ... [2020-07-20 03:35:21,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:21" (1/1) ... [2020-07-20 03:35:21,493 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:21" (1/1) ... [2020-07-20 03:35:21,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-20 03:35:21,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-20 03:35:21,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-20 03:35:21,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-20 03:35:21,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:21" (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 03:35:21,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-20 03:35:21,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-20 03:35:21,652 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-20 03:35:21,652 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-20 03:35:21,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-20 03:35:21,652 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-20 03:35:21,652 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-20 03:35:21,652 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-20 03:35:21,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-20 03:35:21,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-20 03:35:21,819 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-20 03:35:21,819 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-20 03:35:21,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:35:21 BoogieIcfgContainer [2020-07-20 03:35:21,823 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-20 03:35:21,824 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-20 03:35:21,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-20 03:35:21,828 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-20 03:35:21,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 03:35:21" (1/3) ... [2020-07-20 03:35:21,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b68eb66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:35:21, skipping insertion in model container [2020-07-20 03:35:21,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 03:35:21" (2/3) ... [2020-07-20 03:35:21,830 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b68eb66 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 03:35:21, skipping insertion in model container [2020-07-20 03:35:21,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 03:35:21" (3/3) ... [2020-07-20 03:35:21,832 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-2.c [2020-07-20 03:35:21,843 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-20 03:35:21,851 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-20 03:35:21,866 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-20 03:35:21,891 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-20 03:35:21,891 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-20 03:35:21,891 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-20 03:35:21,892 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-20 03:35:21,892 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-20 03:35:21,892 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-20 03:35:21,892 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-20 03:35:21,892 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-20 03:35:21,911 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-20 03:35:21,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-20 03:35:21,918 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:21,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:21,920 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:21,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:21,925 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-20 03:35:21,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:21,934 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26263499] [2020-07-20 03:35:21,934 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:22,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,166 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 03:35:22,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26263499] [2020-07-20 03:35:22,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-20 03:35:22,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-20 03:35:22,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941690928] [2020-07-20 03:35:22,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-20 03:35:22,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:22,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-20 03:35:22,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-20 03:35:22,218 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-20 03:35:22,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:22,294 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-20 03:35:22,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-20 03:35:22,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-20 03:35:22,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:22,308 INFO L225 Difference]: With dead ends: 30 [2020-07-20 03:35:22,308 INFO L226 Difference]: Without dead ends: 18 [2020-07-20 03:35:22,312 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 03:35:22,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-20 03:35:22,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-20 03:35:22,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-20 03:35:22,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-20 03:35:22,361 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-20 03:35:22,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:22,362 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-20 03:35:22,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-20 03:35:22,363 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-20 03:35:22,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-20 03:35:22,369 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:22,371 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:22,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-20 03:35:22,371 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:22,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:22,372 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-20 03:35:22,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:22,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [132609275] [2020-07-20 03:35:22,373 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:22,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:22,558 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 03:35:22,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [132609275] [2020-07-20 03:35:22,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660734240] [2020-07-20 03:35:22,560 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@166c676d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:22,621 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@166c676d issued 3 check-sat command(s) [2020-07-20 03:35:22,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:22,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-20 03:35:22,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:22,705 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 03:35:22,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:22,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-20 03:35:22,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83243224] [2020-07-20 03:35:22,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-20 03:35:22,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:22,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-20 03:35:22,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-20 03:35:22,710 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-20 03:35:22,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:22,783 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-20 03:35:22,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-20 03:35:22,784 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-20 03:35:22,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:22,785 INFO L225 Difference]: With dead ends: 25 [2020-07-20 03:35:22,785 INFO L226 Difference]: Without dead ends: 21 [2020-07-20 03:35:22,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:35:22,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-20 03:35:22,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-20 03:35:22,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-20 03:35:22,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-20 03:35:22,794 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-20 03:35:22,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:22,795 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-20 03:35:22,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-20 03:35:22,795 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-20 03:35:22,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-20 03:35:22,796 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:22,797 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:23,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-20 03:35:23,012 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:23,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:23,013 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-20 03:35:23,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:23,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108585962] [2020-07-20 03:35:23,014 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:23,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,145 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 03:35:23,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108585962] [2020-07-20 03:35:23,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793977715] [2020-07-20 03:35:23,146 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a59182e 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 03:35:23,184 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6a59182e issued 3 check-sat command(s) [2020-07-20 03:35:23,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:23,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-20 03:35:23,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:23,227 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-20 03:35:23,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:23,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-20 03:35:23,228 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788474394] [2020-07-20 03:35:23,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-20 03:35:23,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:23,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-20 03:35:23,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-20 03:35:23,230 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-07-20 03:35:23,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:23,300 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-20 03:35:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-20 03:35:23,301 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-07-20 03:35:23,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:23,302 INFO L225 Difference]: With dead ends: 28 [2020-07-20 03:35:23,302 INFO L226 Difference]: Without dead ends: 24 [2020-07-20 03:35:23,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:35:23,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-20 03:35:23,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-20 03:35:23,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-20 03:35:23,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-20 03:35:23,310 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-20 03:35:23,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:23,311 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-20 03:35:23,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-20 03:35:23,311 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-20 03:35:23,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-20 03:35:23,312 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:23,313 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:23,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:23,526 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:23,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:23,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-20 03:35:23,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:23,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352427261] [2020-07-20 03:35:23,527 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:23,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:23,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 03:35:23,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352427261] [2020-07-20 03:35:23,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946604326] [2020-07-20 03:35:23,719 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@711c6437 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:23,754 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@711c6437 issued 3 check-sat command(s) [2020-07-20 03:35:23,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:23,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-20 03:35:23,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-20 03:35:23,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:23,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-20 03:35:23,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754851640] [2020-07-20 03:35:23,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-20 03:35:23,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:23,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-20 03:35:23,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-20 03:35:23,797 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-07-20 03:35:23,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:23,871 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-20 03:35:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-20 03:35:23,872 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-20 03:35:23,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:23,873 INFO L225 Difference]: With dead ends: 31 [2020-07-20 03:35:23,873 INFO L226 Difference]: Without dead ends: 27 [2020-07-20 03:35:23,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:35:23,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-20 03:35:23,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-20 03:35:23,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-20 03:35:23,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-20 03:35:23,881 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-20 03:35:23,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:23,882 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-20 03:35:23,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-20 03:35:23,882 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-20 03:35:23,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-20 03:35:23,883 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:23,883 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:24,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:24,098 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:24,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:24,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-20 03:35:24,099 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:24,099 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876417387] [2020-07-20 03:35:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 03:35:24,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876417387] [2020-07-20 03:35:24,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635586698] [2020-07-20 03:35:24,265 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2eacef62 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 03:35:24,302 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2eacef62 issued 3 check-sat command(s) [2020-07-20 03:35:24,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:24,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-20 03:35:24,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-20 03:35:24,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:24,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-07-20 03:35:24,348 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929415795] [2020-07-20 03:35:24,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-20 03:35:24,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:24,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-20 03:35:24,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-20 03:35:24,349 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-07-20 03:35:24,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:24,433 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-20 03:35:24,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-20 03:35:24,434 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-07-20 03:35:24,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:24,435 INFO L225 Difference]: With dead ends: 34 [2020-07-20 03:35:24,435 INFO L226 Difference]: Without dead ends: 30 [2020-07-20 03:35:24,436 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:35:24,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-20 03:35:24,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-20 03:35:24,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-20 03:35:24,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-20 03:35:24,443 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-20 03:35:24,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:24,443 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-20 03:35:24,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-20 03:35:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-20 03:35:24,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-20 03:35:24,445 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:24,445 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:24,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:24,659 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:24,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-20 03:35:24,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:24,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344139302] [2020-07-20 03:35:24,661 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:24,924 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 03:35:24,925 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344139302] [2020-07-20 03:35:24,926 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326084019] [2020-07-20 03:35:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56d82ac5 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:24,979 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@56d82ac5 issued 3 check-sat command(s) [2020-07-20 03:35:24,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:24,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-20 03:35:24,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-20 03:35:25,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:25,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-07-20 03:35:25,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253379401] [2020-07-20 03:35:25,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-20 03:35:25,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:25,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-20 03:35:25,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-20 03:35:25,054 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-07-20 03:35:25,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:25,161 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-20 03:35:25,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-20 03:35:25,161 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-07-20 03:35:25,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:25,163 INFO L225 Difference]: With dead ends: 37 [2020-07-20 03:35:25,163 INFO L226 Difference]: Without dead ends: 33 [2020-07-20 03:35:25,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:35:25,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-20 03:35:25,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-20 03:35:25,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-20 03:35:25,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-20 03:35:25,171 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-20 03:35:25,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:25,172 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-20 03:35:25,172 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-20 03:35:25,172 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-20 03:35:25,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-20 03:35:25,173 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:25,174 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:25,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-20 03:35:25,388 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:25,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:25,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-20 03:35:25,390 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:25,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605027675] [2020-07-20 03:35:25,390 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:25,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:25,558 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 03:35:25,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605027675] [2020-07-20 03:35:25,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700608976] [2020-07-20 03:35:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5490baf7 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 03:35:25,596 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5490baf7 issued 3 check-sat command(s) [2020-07-20 03:35:25,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:25,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-20 03:35:25,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:25,644 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-20 03:35:25,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:25,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-20 03:35:25,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990963194] [2020-07-20 03:35:25,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-20 03:35:25,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:25,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-20 03:35:25,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-20 03:35:25,647 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-07-20 03:35:25,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:25,761 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-20 03:35:25,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-20 03:35:25,762 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-07-20 03:35:25,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:25,763 INFO L225 Difference]: With dead ends: 40 [2020-07-20 03:35:25,763 INFO L226 Difference]: Without dead ends: 36 [2020-07-20 03:35:25,764 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-07-20 03:35:25,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-20 03:35:25,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-20 03:35:25,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-20 03:35:25,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-20 03:35:25,771 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-20 03:35:25,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:25,771 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-20 03:35:25,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-20 03:35:25,772 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-20 03:35:25,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-20 03:35:25,773 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:25,773 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:25,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:25,987 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:25,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:25,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-20 03:35:25,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:25,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224704299] [2020-07-20 03:35:25,988 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:25,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,206 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 03:35:26,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224704299] [2020-07-20 03:35:26,207 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917626865] [2020-07-20 03:35:26,207 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a6f6dc2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:26,255 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a6f6dc2 issued 3 check-sat command(s) [2020-07-20 03:35:26,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:26,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-20 03:35:26,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-20 03:35:26,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:26,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-07-20 03:35:26,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888544313] [2020-07-20 03:35:26,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-20 03:35:26,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:26,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-20 03:35:26,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-20 03:35:26,306 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-07-20 03:35:26,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:26,434 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-20 03:35:26,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-20 03:35:26,435 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-07-20 03:35:26,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:26,436 INFO L225 Difference]: With dead ends: 43 [2020-07-20 03:35:26,436 INFO L226 Difference]: Without dead ends: 39 [2020-07-20 03:35:26,437 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-07-20 03:35:26,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-20 03:35:26,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-20 03:35:26,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-20 03:35:26,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-20 03:35:26,444 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-20 03:35:26,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:26,444 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-20 03:35:26,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-20 03:35:26,445 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-20 03:35:26,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-20 03:35:26,446 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:26,446 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:26,659 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:26,660 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:26,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:26,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-20 03:35:26,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:26,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844671571] [2020-07-20 03:35:26,662 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 03:35:26,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844671571] [2020-07-20 03:35:26,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465571592] [2020-07-20 03:35:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@61ba26ee 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 03:35:26,984 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@61ba26ee issued 3 check-sat command(s) [2020-07-20 03:35:26,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:26,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-20 03:35:26,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-20 03:35:27,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:27,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-20 03:35:27,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996596333] [2020-07-20 03:35:27,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-20 03:35:27,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:27,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-20 03:35:27,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-20 03:35:27,111 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-07-20 03:35:27,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:27,288 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-20 03:35:27,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-20 03:35:27,290 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-07-20 03:35:27,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:27,292 INFO L225 Difference]: With dead ends: 46 [2020-07-20 03:35:27,292 INFO L226 Difference]: Without dead ends: 42 [2020-07-20 03:35:27,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-07-20 03:35:27,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-20 03:35:27,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-20 03:35:27,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-20 03:35:27,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-20 03:35:27,307 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-20 03:35:27,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:27,307 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-20 03:35:27,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-20 03:35:27,308 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-20 03:35:27,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-20 03:35:27,311 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:27,312 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:27,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-20 03:35:27,526 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:27,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:27,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-20 03:35:27,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:27,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306050938] [2020-07-20 03:35:27,527 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 03:35:27,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306050938] [2020-07-20 03:35:27,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067355437] [2020-07-20 03:35:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5491f627 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:27,813 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5491f627 issued 3 check-sat command(s) [2020-07-20 03:35:27,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:27,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-20 03:35:27,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-20 03:35:27,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:27,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-07-20 03:35:27,866 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213756405] [2020-07-20 03:35:27,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-20 03:35:27,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:27,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-20 03:35:27,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-20 03:35:27,867 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-07-20 03:35:28,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:28,008 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-20 03:35:28,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-20 03:35:28,009 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-07-20 03:35:28,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:28,010 INFO L225 Difference]: With dead ends: 49 [2020-07-20 03:35:28,010 INFO L226 Difference]: Without dead ends: 45 [2020-07-20 03:35:28,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-07-20 03:35:28,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-20 03:35:28,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-20 03:35:28,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-20 03:35:28,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-20 03:35:28,017 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-20 03:35:28,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:28,018 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-20 03:35:28,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-20 03:35:28,018 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-20 03:35:28,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-20 03:35:28,019 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:28,020 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:28,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:28,235 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:28,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:28,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-20 03:35:28,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:28,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620322643] [2020-07-20 03:35:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:28,551 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 03:35:28,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620322643] [2020-07-20 03:35:28,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554688359] [2020-07-20 03:35:28,552 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26183e39 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 03:35:28,591 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@26183e39 issued 3 check-sat command(s) [2020-07-20 03:35:28,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:28,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-20 03:35:28,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-20 03:35:28,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:28,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-07-20 03:35:28,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181779218] [2020-07-20 03:35:28,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-20 03:35:28,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:28,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-20 03:35:28,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-20 03:35:28,657 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-07-20 03:35:28,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:28,833 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-20 03:35:28,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-20 03:35:28,834 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-07-20 03:35:28,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:28,835 INFO L225 Difference]: With dead ends: 52 [2020-07-20 03:35:28,835 INFO L226 Difference]: Without dead ends: 48 [2020-07-20 03:35:28,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-07-20 03:35:28,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-20 03:35:28,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-20 03:35:28,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-20 03:35:28,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-20 03:35:28,843 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-20 03:35:28,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:28,843 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-20 03:35:28,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-20 03:35:28,844 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-20 03:35:28,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-20 03:35:28,845 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:28,845 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:29,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:29,060 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:29,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:29,060 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-07-20 03:35:29,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:29,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937576611] [2020-07-20 03:35:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:29,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,408 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 03:35:29,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937576611] [2020-07-20 03:35:29,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466137553] [2020-07-20 03:35:29,409 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7134ea0d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:29,452 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7134ea0d issued 3 check-sat command(s) [2020-07-20 03:35:29,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:29,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-20 03:35:29,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-20 03:35:29,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:29,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-07-20 03:35:29,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305654316] [2020-07-20 03:35:29,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-20 03:35:29,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:29,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-20 03:35:29,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-20 03:35:29,511 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-07-20 03:35:29,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:29,689 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-20 03:35:29,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-20 03:35:29,690 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-07-20 03:35:29,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:29,691 INFO L225 Difference]: With dead ends: 55 [2020-07-20 03:35:29,691 INFO L226 Difference]: Without dead ends: 51 [2020-07-20 03:35:29,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-07-20 03:35:29,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-20 03:35:29,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-20 03:35:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-20 03:35:29,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-20 03:35:29,698 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-20 03:35:29,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:29,699 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-20 03:35:29,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-20 03:35:29,699 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-20 03:35:29,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-20 03:35:29,700 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:29,700 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:29,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-20 03:35:29,916 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:29,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:29,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-07-20 03:35:29,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:29,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864067418] [2020-07-20 03:35:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:29,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,328 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 03:35:30,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864067418] [2020-07-20 03:35:30,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808509873] [2020-07-20 03:35:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1731cb53 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:30,372 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1731cb53 issued 3 check-sat command(s) [2020-07-20 03:35:30,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:30,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-20 03:35:30,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:30,448 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-20 03:35:30,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:30,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-07-20 03:35:30,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34379852] [2020-07-20 03:35:30,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-20 03:35:30,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:30,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-20 03:35:30,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-20 03:35:30,453 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-07-20 03:35:30,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:30,647 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-20 03:35:30,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-20 03:35:30,648 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-07-20 03:35:30,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:30,649 INFO L225 Difference]: With dead ends: 58 [2020-07-20 03:35:30,649 INFO L226 Difference]: Without dead ends: 54 [2020-07-20 03:35:30,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2020-07-20 03:35:30,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-20 03:35:30,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-20 03:35:30,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-20 03:35:30,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-20 03:35:30,656 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-20 03:35:30,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:30,657 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-20 03:35:30,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-20 03:35:30,657 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-20 03:35:30,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-20 03:35:30,658 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:30,658 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:30,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-20 03:35:30,872 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:30,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:30,872 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-07-20 03:35:30,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:30,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280336180] [2020-07-20 03:35:30,873 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:30,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:31,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:31,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:31,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:31,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:31,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:31,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:31,407 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 03:35:31,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280336180] [2020-07-20 03:35:31,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067643675] [2020-07-20 03:35:31,408 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@299bdade No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:31,459 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@299bdade issued 3 check-sat command(s) [2020-07-20 03:35:31,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:31,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-20 03:35:31,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:31,529 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-20 03:35:31,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:31,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-07-20 03:35:31,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145652030] [2020-07-20 03:35:31,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-20 03:35:31,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:31,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-20 03:35:31,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-20 03:35:31,532 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-07-20 03:35:31,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:31,749 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-20 03:35:31,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-20 03:35:31,750 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-07-20 03:35:31,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:31,751 INFO L225 Difference]: With dead ends: 61 [2020-07-20 03:35:31,751 INFO L226 Difference]: Without dead ends: 57 [2020-07-20 03:35:31,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-07-20 03:35:31,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-20 03:35:31,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-20 03:35:31,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-20 03:35:31,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-20 03:35:31,762 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-20 03:35:31,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:31,762 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-20 03:35:31,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-20 03:35:31,763 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-20 03:35:31,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-20 03:35:31,764 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:31,764 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:31,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-20 03:35:31,980 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:31,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:31,981 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-07-20 03:35:31,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:31,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114712768] [2020-07-20 03:35:31,982 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:32,566 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 03:35:32,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114712768] [2020-07-20 03:35:32,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675999537] [2020-07-20 03:35:32,568 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3419558f No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:32,640 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3419558f issued 3 check-sat command(s) [2020-07-20 03:35:32,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:32,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-20 03:35:32,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:32,767 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-20 03:35:32,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:32,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-07-20 03:35:32,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361725695] [2020-07-20 03:35:32,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-20 03:35:32,770 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:32,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-20 03:35:32,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-20 03:35:32,772 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-07-20 03:35:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:33,074 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-20 03:35:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-20 03:35:33,075 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-07-20 03:35:33,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:33,076 INFO L225 Difference]: With dead ends: 64 [2020-07-20 03:35:33,077 INFO L226 Difference]: Without dead ends: 60 [2020-07-20 03:35:33,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-07-20 03:35:33,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-20 03:35:33,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-20 03:35:33,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-20 03:35:33,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-20 03:35:33,093 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-20 03:35:33,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:33,095 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-20 03:35:33,095 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-20 03:35:33,095 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-20 03:35:33,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-20 03:35:33,097 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:33,097 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:33,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:33,311 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:33,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:33,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-07-20 03:35:33,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:33,312 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425812958] [2020-07-20 03:35:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:33,854 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 03:35:33,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425812958] [2020-07-20 03:35:33,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040609742] [2020-07-20 03:35:33,855 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@baa7bfc No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:33,910 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@baa7bfc issued 3 check-sat command(s) [2020-07-20 03:35:33,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:33,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-20 03:35:33,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:33,970 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-20 03:35:33,971 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:33,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-07-20 03:35:33,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796074258] [2020-07-20 03:35:33,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-20 03:35:33,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:33,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-20 03:35:33,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-07-20 03:35:33,973 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-07-20 03:35:34,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:34,235 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-20 03:35:34,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-20 03:35:34,237 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2020-07-20 03:35:34,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:34,238 INFO L225 Difference]: With dead ends: 67 [2020-07-20 03:35:34,238 INFO L226 Difference]: Without dead ends: 63 [2020-07-20 03:35:34,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2020-07-20 03:35:34,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-20 03:35:34,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-20 03:35:34,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-20 03:35:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-20 03:35:34,250 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-20 03:35:34,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:34,252 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-20 03:35:34,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-20 03:35:34,253 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-20 03:35:34,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-20 03:35:34,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:34,254 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:34,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-20 03:35:34,467 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:34,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:34,467 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-07-20 03:35:34,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:34,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859425213] [2020-07-20 03:35:34,468 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:34,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-20 03:35:35,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859425213] [2020-07-20 03:35:35,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341239406] [2020-07-20 03:35:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6db45cc2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:35,104 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6db45cc2 issued 3 check-sat command(s) [2020-07-20 03:35:35,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:35,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-20 03:35:35,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:35,166 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-20 03:35:35,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:35,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-07-20 03:35:35,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574064420] [2020-07-20 03:35:35,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-20 03:35:35,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:35,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-20 03:35:35,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-07-20 03:35:35,169 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2020-07-20 03:35:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:35,394 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-07-20 03:35:35,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-20 03:35:35,394 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-07-20 03:35:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:35,396 INFO L225 Difference]: With dead ends: 70 [2020-07-20 03:35:35,396 INFO L226 Difference]: Without dead ends: 66 [2020-07-20 03:35:35,397 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2020-07-20 03:35:35,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-20 03:35:35,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-20 03:35:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-20 03:35:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-07-20 03:35:35,407 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-07-20 03:35:35,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:35,407 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-07-20 03:35:35,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-20 03:35:35,408 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-07-20 03:35:35,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-20 03:35:35,410 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:35,410 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:35,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-20 03:35:35,622 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:35,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:35,623 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-07-20 03:35:35,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:35,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148636881] [2020-07-20 03:35:35,623 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:35,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:35,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:35,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:35,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:35,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:35,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:36,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:36,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-20 03:35:36,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148636881] [2020-07-20 03:35:36,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624916381] [2020-07-20 03:35:36,262 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3301addf No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:36,310 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3301addf issued 3 check-sat command(s) [2020-07-20 03:35:36,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:36,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-20 03:35:36,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-20 03:35:36,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:36,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-07-20 03:35:36,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573980713] [2020-07-20 03:35:36,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-20 03:35:36,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:36,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-20 03:35:36,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-07-20 03:35:36,383 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 24 states. [2020-07-20 03:35:36,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:36,674 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-20 03:35:36,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-20 03:35:36,675 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 115 [2020-07-20 03:35:36,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:36,676 INFO L225 Difference]: With dead ends: 73 [2020-07-20 03:35:36,676 INFO L226 Difference]: Without dead ends: 69 [2020-07-20 03:35:36,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2020-07-20 03:35:36,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-20 03:35:36,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-20 03:35:36,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-20 03:35:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-20 03:35:36,685 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-07-20 03:35:36,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:36,686 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-20 03:35:36,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-20 03:35:36,687 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-20 03:35:36,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-20 03:35:36,689 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:36,689 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:36,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-20 03:35:36,902 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:36,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:36,902 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-07-20 03:35:36,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:36,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656447400] [2020-07-20 03:35:36,902 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:36,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:36,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-20 03:35:37,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656447400] [2020-07-20 03:35:37,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755240312] [2020-07-20 03:35:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b32c5d8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:37,758 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6b32c5d8 issued 3 check-sat command(s) [2020-07-20 03:35:37,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:37,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-20 03:35:37,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-20 03:35:37,833 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:37,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-07-20 03:35:37,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562335892] [2020-07-20 03:35:37,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-20 03:35:37,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:37,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-20 03:35:37,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-07-20 03:35:37,835 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 25 states. [2020-07-20 03:35:38,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:38,148 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-20 03:35:38,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-20 03:35:38,150 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 121 [2020-07-20 03:35:38,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:38,151 INFO L225 Difference]: With dead ends: 76 [2020-07-20 03:35:38,151 INFO L226 Difference]: Without dead ends: 72 [2020-07-20 03:35:38,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=676, Invalid=1216, Unknown=0, NotChecked=0, Total=1892 [2020-07-20 03:35:38,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-20 03:35:38,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-07-20 03:35:38,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-20 03:35:38,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-20 03:35:38,156 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-07-20 03:35:38,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:38,156 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-20 03:35:38,156 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-20 03:35:38,156 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-20 03:35:38,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-20 03:35:38,158 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:38,158 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:38,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:38,369 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:38,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:38,370 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-07-20 03:35:38,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:38,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455290396] [2020-07-20 03:35:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:38,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:38,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:39,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:39,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-20 03:35:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-20 03:35:39,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455290396] [2020-07-20 03:35:39,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033981970] [2020-07-20 03:35:39,201 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65b2ef28 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:39,251 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@65b2ef28 issued 3 check-sat command(s) [2020-07-20 03:35:39,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-20 03:35:39,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-20 03:35:39,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-20 03:35:39,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-20 03:35:39,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-20 03:35:39,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-07-20 03:35:39,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378450203] [2020-07-20 03:35:39,329 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-20 03:35:39,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-20 03:35:39,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-20 03:35:39,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-07-20 03:35:39,330 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 26 states. [2020-07-20 03:35:39,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-20 03:35:39,658 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-07-20 03:35:39,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-20 03:35:39,665 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-07-20 03:35:39,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-20 03:35:39,666 INFO L225 Difference]: With dead ends: 79 [2020-07-20 03:35:39,666 INFO L226 Difference]: Without dead ends: 75 [2020-07-20 03:35:39,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2020-07-20 03:35:39,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-20 03:35:39,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-20 03:35:39,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-20 03:35:39,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-07-20 03:35:39,674 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-07-20 03:35:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-20 03:35:39,675 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-07-20 03:35:39,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-20 03:35:39,675 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-07-20 03:35:39,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-20 03:35:39,676 INFO L414 BasicCegarLoop]: Found error trace [2020-07-20 03:35:39,676 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-20 03:35:39,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-20 03:35:39,890 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-20 03:35:39,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-20 03:35:39,891 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-07-20 03:35:39,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-20 03:35:39,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044501723] [2020-07-20 03:35:39,892 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6f4c5c4 [2020-07-20 03:35:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:35:39,914 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:35:39,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-20 03:35:39,939 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-20 03:35:39,959 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-20 03:35:39,959 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-20 03:35:39,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-20 03:35:40,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.07 03:35:40 BoogieIcfgContainer [2020-07-20 03:35:40,000 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-20 03:35:40,003 INFO L168 Benchmark]: Toolchain (without parser) took 18779.41 ms. Allocated memory was 145.8 MB in the beginning and 449.3 MB in the end (delta: 303.6 MB). Free memory was 103.4 MB in the beginning and 409.3 MB in the end (delta: -305.9 MB). Peak memory consumption was 319.7 MB. Max. memory is 7.1 GB. [2020-07-20 03:35:40,003 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-07-20 03:35:40,004 INFO L168 Benchmark]: CACSL2BoogieTranslator took 243.81 ms. Allocated memory is still 145.8 MB. Free memory was 103.0 MB in the beginning and 93.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-20 03:35:40,004 INFO L168 Benchmark]: Boogie Preprocessor took 24.18 ms. Allocated memory is still 145.8 MB. Free memory was 93.9 MB in the beginning and 92.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-20 03:35:40,005 INFO L168 Benchmark]: RCFGBuilder took 328.75 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 92.5 MB in the beginning and 171.6 MB in the end (delta: -79.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-07-20 03:35:40,005 INFO L168 Benchmark]: TraceAbstraction took 18175.87 ms. Allocated memory was 203.4 MB in the beginning and 449.3 MB in the end (delta: 245.9 MB). Free memory was 170.9 MB in the beginning and 409.3 MB in the end (delta: -238.4 MB). Peak memory consumption was 329.6 MB. Max. memory is 7.1 GB. [2020-07-20 03:35:40,008 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 145.8 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 243.81 ms. Allocated memory is still 145.8 MB. Free memory was 103.0 MB in the beginning and 93.9 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 24.18 ms. Allocated memory is still 145.8 MB. Free memory was 93.9 MB in the beginning and 92.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 328.75 ms. Allocated memory was 145.8 MB in the beginning and 203.4 MB in the end (delta: 57.7 MB). Free memory was 92.5 MB in the beginning and 171.6 MB in the end (delta: -79.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 18175.87 ms. Allocated memory was 203.4 MB in the beginning and 449.3 MB in the end (delta: 245.9 MB). Free memory was 170.9 MB in the beginning and 409.3 MB in the end (delta: -238.4 MB). Peak memory consumption was 329.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 20; VAL [input=20] [L11] CALL, EXPR id(input) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) VAL [id(input)=20, input=20] [L11] int result = id(input); [L12] COND TRUE result == 20 VAL [input=20, result=20] [L13] __VERIFIER_error() VAL [input=20, result=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 18.0s, OverallIterations: 21, TraceHistogramMax: 21, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 264 SDtfs, 877 SDslu, 1288 SDs, 0 SdLazy, 752 SolverSat, 229 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2308 GetRequests, 1810 SyntacticMatches, 0 SemanticMatches, 498 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2850 ImplicationChecksByTransitivity, 5.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=75occurred in iteration=20, 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, 20 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 8.4s InterpolantComputationTime, 2920 NumberOfCodeBlocks, 2601 NumberOfCodeBlocksAsserted, 78 NumberOfCheckSat, 2748 ConstructedInterpolants, 0 QuantifiedInterpolants, 602160 SizeOfPredicates, 228 NumberOfNonLiveVariables, 2785 ConjunctsInSsa, 456 ConjunctsInUnsatCore, 39 InterpolantComputations, 1 PerfectInterpolantSequences, 7600/15200 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 incorrect! Received shutdown request...