/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 NUM_FUNCTIONS --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/sum_25x0-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-79ed534 [2020-07-19 23:17:58,383 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-19 23:17:58,386 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-19 23:17:58,407 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-07-19 23:17:58,434 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-19 23:17:58,437 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-19 23:17:58,439 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-19 23:17:58,441 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-19 23:17:58,444 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-19 23:17:58,447 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-19 23:17:58,449 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-19 23:17:58,456 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-19 23:17:58,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-19 23:17:58,462 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-19 23:17:58,464 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-19 23:17:58,465 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-19 23:17:58,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-19 23:17:58,481 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-19 23:17:58,482 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-19 23:17:58,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-19 23:17:58,484 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 [2020-07-19 23:17:58,507 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-19 23:17:58,507 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-19 23:17:58,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-19 23:17:58,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-19 23:17:58,510 INFO L138 SettingsManager]: * Use SBE=true [2020-07-19 23:17:58,511 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-19 23:17:58,511 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-19 23:17:58,512 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-19 23:17:58,512 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-19 23:17:58,512 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-19 23:17:58,513 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-19 23:17:58,513 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-19 23:17:58,514 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-19 23:17:58,514 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-19 23:17:58,514 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-19 23:17:58,515 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-19 23:17:58,515 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-19 23:17:58,515 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-19 23:17:58,515 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-19 23:17:58,516 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-19 23:17:58,516 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-19 23:17:58,516 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-19 23:17:58,516 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-19 23:17:58,516 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-19 23:17:58,517 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-19 23:17:58,517 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-19 23:17:58,517 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-19 23:17:58,517 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-19 23:17:58,517 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-19 23:17:58,518 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_FUNCTIONS 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 [2020-07-19 23:17:58,850 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-19 23:17:58,866 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-19 23:17:58,870 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-19 23:17:58,872 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-19 23:17:58,874 INFO L275 PluginConnector]: CDTParser initialized [2020-07-19 23:17:58,875 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/sum_25x0-2.c [2020-07-19 23:17:58,943 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4141d1708/159011bcd4864fd6abb066ea4ea486b5/FLAGdd2c1a411 [2020-07-19 23:17:59,420 INFO L306 CDTParser]: Found 1 translation units. [2020-07-19 23:17:59,421 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/sum_25x0-2.c [2020-07-19 23:17:59,427 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4141d1708/159011bcd4864fd6abb066ea4ea486b5/FLAGdd2c1a411 [2020-07-19 23:17:59,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4141d1708/159011bcd4864fd6abb066ea4ea486b5 [2020-07-19 23:17:59,849 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-19 23:17:59,853 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-19 23:17:59,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-19 23:17:59,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-19 23:17:59,859 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-19 23:17:59,860 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:17:59" (1/1) ... [2020-07-19 23:17:59,864 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26a1ff01 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:17:59, skipping insertion in model container [2020-07-19 23:17:59,864 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:17:59" (1/1) ... [2020-07-19 23:17:59,873 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-19 23:17:59,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-19 23:18:00,097 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:18:00,102 INFO L203 MainTranslator]: Completed pre-run [2020-07-19 23:18:00,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-19 23:18:00,132 INFO L208 MainTranslator]: Completed translation [2020-07-19 23:18:00,133 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:00 WrapperNode [2020-07-19 23:18:00,133 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-19 23:18:00,134 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-19 23:18:00,134 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-19 23:18:00,135 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-19 23:18:00,146 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:00" (1/1) ... [2020-07-19 23:18:00,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:00" (1/1) ... [2020-07-19 23:18:00,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:00" (1/1) ... [2020-07-19 23:18:00,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:00" (1/1) ... [2020-07-19 23:18:00,155 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:00" (1/1) ... [2020-07-19 23:18:00,157 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:00" (1/1) ... [2020-07-19 23:18:00,158 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:00" (1/1) ... [2020-07-19 23:18:00,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-19 23:18:00,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-19 23:18:00,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-19 23:18:00,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-19 23:18:00,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:00" (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 [2020-07-19 23:18:00,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-19 23:18:00,325 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-19 23:18:00,325 INFO L138 BoogieDeclarations]: Found implementation of procedure sum [2020-07-19 23:18:00,326 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-19 23:18:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-19 23:18:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure sum [2020-07-19 23:18:00,326 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-19 23:18:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-19 23:18:00,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-19 23:18:00,502 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-19 23:18:00,503 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-19 23:18:00,507 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:18:00 BoogieIcfgContainer [2020-07-19 23:18:00,507 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-19 23:18:00,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-19 23:18:00,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-19 23:18:00,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-19 23:18:00,513 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:17:59" (1/3) ... [2020-07-19 23:18:00,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7144c50a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:18:00, skipping insertion in model container [2020-07-19 23:18:00,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:18:00" (2/3) ... [2020-07-19 23:18:00,516 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7144c50a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:18:00, skipping insertion in model container [2020-07-19 23:18:00,516 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:18:00" (3/3) ... [2020-07-19 23:18:00,518 INFO L109 eAbstractionObserver]: Analyzing ICFG sum_25x0-2.c [2020-07-19 23:18:00,531 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-19 23:18:00,539 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-19 23:18:00,557 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-19 23:18:00,617 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-19 23:18:00,618 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-19 23:18:00,618 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-19 23:18:00,618 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-19 23:18:00,619 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-19 23:18:00,619 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-19 23:18:00,619 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-19 23:18:00,619 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-19 23:18:00,650 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-19 23:18:00,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-19 23:18:00,664 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:00,665 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:00,666 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:00,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:00,674 INFO L82 PathProgramCache]: Analyzing trace with hash 2001781660, now seen corresponding path program 1 times [2020-07-19 23:18:00,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:00,688 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114834944] [2020-07-19 23:18:00,688 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:00,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:00,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-19 23:18:00,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114834944] [2020-07-19 23:18:00,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-19 23:18:00,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-19 23:18:00,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903794283] [2020-07-19 23:18:00,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-19 23:18:00,986 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:01,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-19 23:18:01,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-19 23:18:01,009 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-19 23:18:01,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:01,138 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-19 23:18:01,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-19 23:18:01,141 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-19 23:18:01,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:01,152 INFO L225 Difference]: With dead ends: 30 [2020-07-19 23:18:01,153 INFO L226 Difference]: Without dead ends: 18 [2020-07-19 23:18:01,157 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 [2020-07-19 23:18:01,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-19 23:18:01,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-19 23:18:01,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-19 23:18:01,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-19 23:18:01,202 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-19 23:18:01,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:01,203 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-19 23:18:01,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-19 23:18:01,204 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-19 23:18:01,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-19 23:18:01,206 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:01,206 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:01,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-19 23:18:01,207 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:01,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:01,208 INFO L82 PathProgramCache]: Analyzing trace with hash -118151420, now seen corresponding path program 1 times [2020-07-19 23:18:01,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:01,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603003436] [2020-07-19 23:18:01,209 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:18:01,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603003436] [2020-07-19 23:18:01,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741760918] [2020-07-19 23:18:01,354 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@123b97ca No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:01,404 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@123b97ca issued 2 check-sat command(s) [2020-07-19 23:18:01,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:01,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-19 23:18:01,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-19 23:18:01,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:01,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-07-19 23:18:01,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280720764] [2020-07-19 23:18:01,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-19 23:18:01,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:01,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-19 23:18:01,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-07-19 23:18:01,492 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 7 states. [2020-07-19 23:18:01,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:01,562 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-19 23:18:01,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-19 23:18:01,563 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-07-19 23:18:01,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:01,564 INFO L225 Difference]: With dead ends: 25 [2020-07-19 23:18:01,564 INFO L226 Difference]: Without dead ends: 21 [2020-07-19 23:18:01,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:18:01,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-19 23:18:01,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-19 23:18:01,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-19 23:18:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-19 23:18:01,574 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-19 23:18:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:01,575 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-19 23:18:01,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-19 23:18:01,575 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-19 23:18:01,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-19 23:18:01,576 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:01,577 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:01,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-19 23:18:01,791 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:01,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:01,792 INFO L82 PathProgramCache]: Analyzing trace with hash 764931548, now seen corresponding path program 2 times [2020-07-19 23:18:01,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:01,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211993502] [2020-07-19 23:18:01,793 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:01,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:01,953 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 23:18:01,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211993502] [2020-07-19 23:18:01,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478701130] [2020-07-19 23:18:01,954 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63390cbd 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 [2020-07-19 23:18:01,993 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@63390cbd issued 2 check-sat command(s) [2020-07-19 23:18:01,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:01,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-19 23:18:01,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:02,031 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-19 23:18:02,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:02,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-07-19 23:18:02,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758274802] [2020-07-19 23:18:02,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-19 23:18:02,033 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:02,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-19 23:18:02,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-19 23:18:02,034 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 8 states. [2020-07-19 23:18:02,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:02,115 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-19 23:18:02,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-19 23:18:02,116 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 25 [2020-07-19 23:18:02,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:02,117 INFO L225 Difference]: With dead ends: 28 [2020-07-19 23:18:02,117 INFO L226 Difference]: Without dead ends: 24 [2020-07-19 23:18:02,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:18:02,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-19 23:18:02,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-19 23:18:02,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-19 23:18:02,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-19 23:18:02,125 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-19 23:18:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:02,126 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-19 23:18:02,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-19 23:18:02,126 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-19 23:18:02,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-19 23:18:02,128 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:02,128 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:02,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:02,342 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:02,343 INFO L82 PathProgramCache]: Analyzing trace with hash 601942852, now seen corresponding path program 3 times [2020-07-19 23:18:02,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:02,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783255834] [2020-07-19 23:18:02,344 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,537 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 23:18:02,537 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783255834] [2020-07-19 23:18:02,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541600124] [2020-07-19 23:18:02,538 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@61266a5d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:02,573 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@61266a5d issued 2 check-sat command(s) [2020-07-19 23:18:02,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:02,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-19 23:18:02,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-19 23:18:02,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:02,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-07-19 23:18:02,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006135802] [2020-07-19 23:18:02,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-19 23:18:02,609 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-19 23:18:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-19 23:18:02,609 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 9 states. [2020-07-19 23:18:02,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:02,689 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-19 23:18:02,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-19 23:18:02,690 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-07-19 23:18:02,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:02,691 INFO L225 Difference]: With dead ends: 31 [2020-07-19 23:18:02,691 INFO L226 Difference]: Without dead ends: 27 [2020-07-19 23:18:02,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:18:02,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-19 23:18:02,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-19 23:18:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-19 23:18:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-19 23:18:02,699 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-19 23:18:02,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:02,699 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-19 23:18:02,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-19 23:18:02,699 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-19 23:18:02,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-19 23:18:02,701 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:02,701 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:02,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:02,918 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:02,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:02,919 INFO L82 PathProgramCache]: Analyzing trace with hash -183109604, now seen corresponding path program 4 times [2020-07-19 23:18:02,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:02,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332080258] [2020-07-19 23:18:02,920 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,215 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-19 23:18:03,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332080258] [2020-07-19 23:18:03,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376671412] [2020-07-19 23:18:03,216 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e75f3f2 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 [2020-07-19 23:18:03,254 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@e75f3f2 issued 2 check-sat command(s) [2020-07-19 23:18:03,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:03,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-19 23:18:03,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:03,289 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-19 23:18:03,289 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:03,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-07-19 23:18:03,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305615037] [2020-07-19 23:18:03,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-19 23:18:03,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:03,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-19 23:18:03,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-19 23:18:03,292 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 10 states. [2020-07-19 23:18:03,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:03,414 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-19 23:18:03,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-19 23:18:03,415 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-07-19 23:18:03,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:03,417 INFO L225 Difference]: With dead ends: 34 [2020-07-19 23:18:03,417 INFO L226 Difference]: Without dead ends: 30 [2020-07-19 23:18:03,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:18:03,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-19 23:18:03,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-19 23:18:03,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-19 23:18:03,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-19 23:18:03,425 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-19 23:18:03,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:03,426 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-19 23:18:03,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-19 23:18:03,426 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-19 23:18:03,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-19 23:18:03,427 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:03,428 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:03,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:03,643 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:03,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:03,644 INFO L82 PathProgramCache]: Analyzing trace with hash -155447420, now seen corresponding path program 5 times [2020-07-19 23:18:03,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:03,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595040037] [2020-07-19 23:18:03,645 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:03,834 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-19 23:18:03,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595040037] [2020-07-19 23:18:03,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195144598] [2020-07-19 23:18:03,835 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6eeea985 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:03,879 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6eeea985 issued 2 check-sat command(s) [2020-07-19 23:18:03,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:03,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-19 23:18:03,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:03,934 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-19 23:18:03,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:03,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-07-19 23:18:03,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700284124] [2020-07-19 23:18:03,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-19 23:18:03,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:03,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-19 23:18:03,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-19 23:18:03,937 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 11 states. [2020-07-19 23:18:04,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:04,036 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-19 23:18:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-19 23:18:04,037 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 43 [2020-07-19 23:18:04,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:04,038 INFO L225 Difference]: With dead ends: 37 [2020-07-19 23:18:04,039 INFO L226 Difference]: Without dead ends: 33 [2020-07-19 23:18:04,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:18:04,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-19 23:18:04,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-19 23:18:04,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-19 23:18:04,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-19 23:18:04,047 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-19 23:18:04,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:04,047 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-19 23:18:04,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-19 23:18:04,047 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-19 23:18:04,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-19 23:18:04,049 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:04,050 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:04,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-19 23:18:04,264 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:04,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:04,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1716183644, now seen corresponding path program 6 times [2020-07-19 23:18:04,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:04,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200438787] [2020-07-19 23:18:04,265 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:04,477 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-19 23:18:04,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200438787] [2020-07-19 23:18:04,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707990283] [2020-07-19 23:18:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7951752b 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 [2020-07-19 23:18:04,523 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7951752b issued 2 check-sat command(s) [2020-07-19 23:18:04,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:04,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-19 23:18:04,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-19 23:18:04,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:04,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-07-19 23:18:04,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926417300] [2020-07-19 23:18:04,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-19 23:18:04,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:04,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-19 23:18:04,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-19 23:18:04,601 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 12 states. [2020-07-19 23:18:04,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:04,737 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-19 23:18:04,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-19 23:18:04,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-07-19 23:18:04,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:04,740 INFO L225 Difference]: With dead ends: 40 [2020-07-19 23:18:04,740 INFO L226 Difference]: Without dead ends: 36 [2020-07-19 23:18:04,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:18:04,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-19 23:18:04,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-19 23:18:04,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-19 23:18:04,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-19 23:18:04,755 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-19 23:18:04,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:04,756 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-19 23:18:04,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-19 23:18:04,757 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-19 23:18:04,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-19 23:18:04,758 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:04,762 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:04,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:04,977 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:04,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:04,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1079602236, now seen corresponding path program 7 times [2020-07-19 23:18:04,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:04,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669503053] [2020-07-19 23:18:04,979 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-19 23:18:05,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669503053] [2020-07-19 23:18:05,225 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673752853] [2020-07-19 23:18:05,225 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@339a1a36 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:05,269 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@339a1a36 issued 2 check-sat command(s) [2020-07-19 23:18:05,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:05,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-19 23:18:05,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:05,306 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-19 23:18:05,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:05,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-07-19 23:18:05,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234912653] [2020-07-19 23:18:05,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-19 23:18:05,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:05,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-19 23:18:05,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-19 23:18:05,309 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 13 states. [2020-07-19 23:18:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:05,446 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-19 23:18:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-19 23:18:05,447 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 55 [2020-07-19 23:18:05,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:05,448 INFO L225 Difference]: With dead ends: 43 [2020-07-19 23:18:05,449 INFO L226 Difference]: Without dead ends: 39 [2020-07-19 23:18:05,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2020-07-19 23:18:05,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-19 23:18:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-19 23:18:05,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-19 23:18:05,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-19 23:18:05,466 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-19 23:18:05,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:05,469 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-19 23:18:05,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-19 23:18:05,470 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-19 23:18:05,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-19 23:18:05,473 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:05,473 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:05,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:05,674 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:05,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:05,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1035381916, now seen corresponding path program 8 times [2020-07-19 23:18:05,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:05,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181880589] [2020-07-19 23:18:05,676 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,006 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-19 23:18:06,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181880589] [2020-07-19 23:18:06,007 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934758148] [2020-07-19 23:18:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45d5449f 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 [2020-07-19 23:18:06,062 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@45d5449f issued 2 check-sat command(s) [2020-07-19 23:18:06,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:06,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-19 23:18:06,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-19 23:18:06,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:06,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-07-19 23:18:06,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660490590] [2020-07-19 23:18:06,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-19 23:18:06,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:06,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-19 23:18:06,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-19 23:18:06,123 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-07-19 23:18:06,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:06,288 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-19 23:18:06,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-19 23:18:06,289 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-07-19 23:18:06,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:06,290 INFO L225 Difference]: With dead ends: 46 [2020-07-19 23:18:06,290 INFO L226 Difference]: Without dead ends: 42 [2020-07-19 23:18:06,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2020-07-19 23:18:06,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-19 23:18:06,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-19 23:18:06,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-19 23:18:06,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-19 23:18:06,303 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-19 23:18:06,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:06,303 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-19 23:18:06,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-19 23:18:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-19 23:18:06,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-19 23:18:06,309 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:06,309 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:06,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-19 23:18:06,511 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:06,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:06,512 INFO L82 PathProgramCache]: Analyzing trace with hash 952137732, now seen corresponding path program 9 times [2020-07-19 23:18:06,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:06,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211807936] [2020-07-19 23:18:06,514 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-19 23:18:06,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211807936] [2020-07-19 23:18:06,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855303018] [2020-07-19 23:18:06,895 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@53c93616 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:06,956 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@53c93616 issued 2 check-sat command(s) [2020-07-19 23:18:06,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:06,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-19 23:18:06,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-19 23:18:07,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:07,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-07-19 23:18:07,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406992067] [2020-07-19 23:18:07,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-19 23:18:07,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:07,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-19 23:18:07,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-19 23:18:07,038 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 15 states. [2020-07-19 23:18:07,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:07,225 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-19 23:18:07,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-19 23:18:07,226 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 67 [2020-07-19 23:18:07,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:07,227 INFO L225 Difference]: With dead ends: 49 [2020-07-19 23:18:07,232 INFO L226 Difference]: Without dead ends: 45 [2020-07-19 23:18:07,234 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=387, Unknown=0, NotChecked=0, Total=600 [2020-07-19 23:18:07,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-19 23:18:07,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-19 23:18:07,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-19 23:18:07,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-19 23:18:07,249 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-19 23:18:07,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:07,250 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-19 23:18:07,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-19 23:18:07,250 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-19 23:18:07,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-19 23:18:07,254 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:07,254 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:07,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:07,469 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:07,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:07,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1540970204, now seen corresponding path program 10 times [2020-07-19 23:18:07,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:07,471 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845159613] [2020-07-19 23:18:07,471 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:07,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:07,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:07,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:07,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:07,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-19 23:18:07,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845159613] [2020-07-19 23:18:07,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246325098] [2020-07-19 23:18:07,881 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3fe4122e 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 [2020-07-19 23:18:07,926 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@3fe4122e issued 2 check-sat command(s) [2020-07-19 23:18:07,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:07,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-19 23:18:07,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-19 23:18:07,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:07,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-07-19 23:18:07,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16332618] [2020-07-19 23:18:07,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-19 23:18:07,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:07,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-19 23:18:07,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-19 23:18:07,969 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 16 states. [2020-07-19 23:18:08,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:08,152 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-19 23:18:08,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-19 23:18:08,153 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 73 [2020-07-19 23:18:08,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:08,155 INFO L225 Difference]: With dead ends: 52 [2020-07-19 23:18:08,155 INFO L226 Difference]: Without dead ends: 48 [2020-07-19 23:18:08,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=250, Invalid=452, Unknown=0, NotChecked=0, Total=702 [2020-07-19 23:18:08,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-19 23:18:08,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-19 23:18:08,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-19 23:18:08,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-19 23:18:08,163 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-19 23:18:08,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:08,163 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-19 23:18:08,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-19 23:18:08,164 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-19 23:18:08,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-19 23:18:08,165 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:08,165 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:08,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:08,380 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:08,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:08,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2010530748, now seen corresponding path program 11 times [2020-07-19 23:18:08,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:08,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658027128] [2020-07-19 23:18:08,381 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:08,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:08,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:08,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:08,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:08,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:08,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:08,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:08,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:08,842 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-19 23:18:08,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658027128] [2020-07-19 23:18:08,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295644773] [2020-07-19 23:18:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@796d09ca No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:08,889 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@796d09ca issued 2 check-sat command(s) [2020-07-19 23:18:08,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:08,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-19 23:18:08,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-19 23:18:08,933 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:08,933 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-07-19 23:18:08,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320721637] [2020-07-19 23:18:08,934 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-19 23:18:08,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:08,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-19 23:18:08,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-19 23:18:08,936 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 17 states. [2020-07-19 23:18:09,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:09,147 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-19 23:18:09,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-19 23:18:09,147 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-07-19 23:18:09,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:09,148 INFO L225 Difference]: With dead ends: 55 [2020-07-19 23:18:09,149 INFO L226 Difference]: Without dead ends: 51 [2020-07-19 23:18:09,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2020-07-19 23:18:09,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-19 23:18:09,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-19 23:18:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-19 23:18:09,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-19 23:18:09,164 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-19 23:18:09,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:09,165 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-19 23:18:09,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-19 23:18:09,166 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-19 23:18:09,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-19 23:18:09,170 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:09,170 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:09,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-19 23:18:09,372 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:09,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:09,372 INFO L82 PathProgramCache]: Analyzing trace with hash -986521316, now seen corresponding path program 12 times [2020-07-19 23:18:09,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:09,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47744267] [2020-07-19 23:18:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:09,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:09,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:09,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:09,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:09,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:09,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-19 23:18:09,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47744267] [2020-07-19 23:18:09,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024525294] [2020-07-19 23:18:09,949 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15550190 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 [2020-07-19 23:18:10,000 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@15550190 issued 2 check-sat command(s) [2020-07-19 23:18:10,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:10,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-19 23:18:10,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:10,056 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-19 23:18:10,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:10,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-07-19 23:18:10,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049561365] [2020-07-19 23:18:10,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-19 23:18:10,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:10,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-19 23:18:10,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-19 23:18:10,059 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 18 states. [2020-07-19 23:18:10,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:10,280 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-19 23:18:10,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-19 23:18:10,281 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 85 [2020-07-19 23:18:10,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:10,282 INFO L225 Difference]: With dead ends: 58 [2020-07-19 23:18:10,282 INFO L226 Difference]: Without dead ends: 54 [2020-07-19 23:18:10,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=333, Invalid=597, Unknown=0, NotChecked=0, Total=930 [2020-07-19 23:18:10,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-19 23:18:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-19 23:18:10,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-19 23:18:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-19 23:18:10,294 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-19 23:18:10,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:10,294 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-19 23:18:10,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-19 23:18:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-19 23:18:10,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-19 23:18:10,298 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:10,298 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:10,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-19 23:18:10,499 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:10,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:10,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1073897604, now seen corresponding path program 13 times [2020-07-19 23:18:10,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:10,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947158648] [2020-07-19 23:18:10,500 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:10,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:10,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:10,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:10,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:10,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:11,024 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-19 23:18:11,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947158648] [2020-07-19 23:18:11,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362038087] [2020-07-19 23:18:11,025 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6410d250 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:11,074 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6410d250 issued 2 check-sat command(s) [2020-07-19 23:18:11,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:11,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-19 23:18:11,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-19 23:18:11,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:11,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-07-19 23:18:11,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606140181] [2020-07-19 23:18:11,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-19 23:18:11,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:11,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-19 23:18:11,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-19 23:18:11,137 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 19 states. [2020-07-19 23:18:11,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:11,342 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-19 23:18:11,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-19 23:18:11,342 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 91 [2020-07-19 23:18:11,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:11,343 INFO L225 Difference]: With dead ends: 61 [2020-07-19 23:18:11,343 INFO L226 Difference]: Without dead ends: 57 [2020-07-19 23:18:11,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=379, Invalid=677, Unknown=0, NotChecked=0, Total=1056 [2020-07-19 23:18:11,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-19 23:18:11,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-19 23:18:11,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-19 23:18:11,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-19 23:18:11,357 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-19 23:18:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:11,357 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-19 23:18:11,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-19 23:18:11,361 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-19 23:18:11,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-19 23:18:11,362 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:11,362 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:11,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-19 23:18:11,578 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:11,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:11,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1572648100, now seen corresponding path program 14 times [2020-07-19 23:18:11,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:11,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959402964] [2020-07-19 23:18:11,579 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:11,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:11,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:11,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:11,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:11,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:11,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:11,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:11,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:12,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:12,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:12,146 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-19 23:18:12,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959402964] [2020-07-19 23:18:12,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857211533] [2020-07-19 23:18:12,147 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a323f26 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 [2020-07-19 23:18:12,197 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@1a323f26 issued 2 check-sat command(s) [2020-07-19 23:18:12,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:12,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-19 23:18:12,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:12,241 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-19 23:18:12,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:12,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-07-19 23:18:12,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472531633] [2020-07-19 23:18:12,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-19 23:18:12,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:12,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-19 23:18:12,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-19 23:18:12,245 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 20 states. [2020-07-19 23:18:12,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:12,475 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-19 23:18:12,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-19 23:18:12,475 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-07-19 23:18:12,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:12,476 INFO L225 Difference]: With dead ends: 64 [2020-07-19 23:18:12,476 INFO L226 Difference]: Without dead ends: 60 [2020-07-19 23:18:12,478 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=428, Invalid=762, Unknown=0, NotChecked=0, Total=1190 [2020-07-19 23:18:12,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-19 23:18:12,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-19 23:18:12,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-19 23:18:12,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-19 23:18:12,487 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-19 23:18:12,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:12,488 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-19 23:18:12,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-19 23:18:12,489 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-19 23:18:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-19 23:18:12,490 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:12,490 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:12,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:12,706 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:12,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1584030916, now seen corresponding path program 15 times [2020-07-19 23:18:12,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:12,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459775227] [2020-07-19 23:18:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:12,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:12,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:13,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:13,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:13,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:13,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-19 23:18:13,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459775227] [2020-07-19 23:18:13,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139574950] [2020-07-19 23:18:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74c27b56 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:13,466 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@74c27b56 issued 2 check-sat command(s) [2020-07-19 23:18:13,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:13,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-19 23:18:13,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:13,548 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-19 23:18:13,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:13,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-07-19 23:18:13,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087379873] [2020-07-19 23:18:13,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-19 23:18:13,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:13,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-19 23:18:13,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-19 23:18:13,554 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 21 states. [2020-07-19 23:18:13,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:13,887 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-19 23:18:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-19 23:18:13,888 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-07-19 23:18:13,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:13,890 INFO L225 Difference]: With dead ends: 67 [2020-07-19 23:18:13,890 INFO L226 Difference]: Without dead ends: 63 [2020-07-19 23:18:13,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=480, Invalid=852, Unknown=0, NotChecked=0, Total=1332 [2020-07-19 23:18:13,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-19 23:18:13,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-19 23:18:13,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-19 23:18:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-19 23:18:13,909 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-19 23:18:13,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:13,910 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-19 23:18:13,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-19 23:18:13,913 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-19 23:18:13,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-19 23:18:13,915 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:13,917 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:14,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-19 23:18:14,131 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:14,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:14,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1066046876, now seen corresponding path program 16 times [2020-07-19 23:18:14,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:14,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644391875] [2020-07-19 23:18:14,132 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-19 23:18:14,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644391875] [2020-07-19 23:18:14,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807784224] [2020-07-19 23:18:14,768 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7790e4a7 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 [2020-07-19 23:18:14,824 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@7790e4a7 issued 2 check-sat command(s) [2020-07-19 23:18:14,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:14,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-19 23:18:14,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-19 23:18:14,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:14,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-07-19 23:18:14,912 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460486189] [2020-07-19 23:18:14,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-19 23:18:14,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:14,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-19 23:18:14,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-07-19 23:18:14,915 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 22 states. [2020-07-19 23:18:15,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:15,200 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-07-19 23:18:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-19 23:18:15,201 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 109 [2020-07-19 23:18:15,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:15,202 INFO L225 Difference]: With dead ends: 70 [2020-07-19 23:18:15,202 INFO L226 Difference]: Without dead ends: 66 [2020-07-19 23:18:15,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=535, Invalid=947, Unknown=0, NotChecked=0, Total=1482 [2020-07-19 23:18:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-19 23:18:15,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-19 23:18:15,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-19 23:18:15,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-07-19 23:18:15,209 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-07-19 23:18:15,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:15,209 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-07-19 23:18:15,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-19 23:18:15,210 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-07-19 23:18:15,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-19 23:18:15,211 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:15,211 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:15,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-19 23:18:15,412 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:15,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:15,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1300351236, now seen corresponding path program 17 times [2020-07-19 23:18:15,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:15,412 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962131894] [2020-07-19 23:18:15,413 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:15,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-19 23:18:16,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962131894] [2020-07-19 23:18:16,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743598025] [2020-07-19 23:18:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d84cb05 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:16,249 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@5d84cb05 issued 2 check-sat command(s) [2020-07-19 23:18:16,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:16,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-19 23:18:16,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:16,296 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-19 23:18:16,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:16,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-07-19 23:18:16,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603417720] [2020-07-19 23:18:16,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-19 23:18:16,298 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:16,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-19 23:18:16,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-07-19 23:18:16,298 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 23 states. [2020-07-19 23:18:16,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:16,602 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-19 23:18:16,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-19 23:18:16,603 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 115 [2020-07-19 23:18:16,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:16,605 INFO L225 Difference]: With dead ends: 73 [2020-07-19 23:18:16,605 INFO L226 Difference]: Without dead ends: 69 [2020-07-19 23:18:16,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=593, Invalid=1047, Unknown=0, NotChecked=0, Total=1640 [2020-07-19 23:18:16,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-19 23:18:16,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-19 23:18:16,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-19 23:18:16,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-19 23:18:16,611 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-07-19 23:18:16,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:16,612 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-19 23:18:16,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-19 23:18:16,612 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-19 23:18:16,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-19 23:18:16,613 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:16,613 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:16,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-19 23:18:16,828 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:16,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:16,828 INFO L82 PathProgramCache]: Analyzing trace with hash 227065820, now seen corresponding path program 18 times [2020-07-19 23:18:16,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:16,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632501790] [2020-07-19 23:18:16,829 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:16,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:16,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:16,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:16,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-19 23:18:17,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632501790] [2020-07-19 23:18:17,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69670706] [2020-07-19 23:18:17,849 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52ab63b6 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 [2020-07-19 23:18:17,936 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@52ab63b6 issued 2 check-sat command(s) [2020-07-19 23:18:17,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:17,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-19 23:18:17,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:17,999 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-19 23:18:18,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:18,001 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-07-19 23:18:18,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455870204] [2020-07-19 23:18:18,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-19 23:18:18,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:18,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-19 23:18:18,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-07-19 23:18:18,004 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 24 states. [2020-07-19 23:18:18,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:18,337 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-19 23:18:18,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-19 23:18:18,338 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 121 [2020-07-19 23:18:18,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:18,339 INFO L225 Difference]: With dead ends: 76 [2020-07-19 23:18:18,340 INFO L226 Difference]: Without dead ends: 72 [2020-07-19 23:18:18,342 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=654, Invalid=1152, Unknown=0, NotChecked=0, Total=1806 [2020-07-19 23:18:18,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-19 23:18:18,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-07-19 23:18:18,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-19 23:18:18,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-19 23:18:18,351 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-07-19 23:18:18,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:18,351 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-19 23:18:18,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-19 23:18:18,351 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-19 23:18:18,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-19 23:18:18,353 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:18,353 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:18,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:18,569 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:18,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:18,570 INFO L82 PathProgramCache]: Analyzing trace with hash -479687356, now seen corresponding path program 19 times [2020-07-19 23:18:18,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:18,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131498801] [2020-07-19 23:18:18,571 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:18,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:18,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:18,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:19,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:19,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:19,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:19,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:19,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:19,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:19,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:19,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-19 23:18:19,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131498801] [2020-07-19 23:18:19,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540125526] [2020-07-19 23:18:19,785 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@ae5db9c No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:19,853 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@ae5db9c issued 2 check-sat command(s) [2020-07-19 23:18:19,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:19,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-19 23:18:19,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:19,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-19 23:18:19,916 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:19,916 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-07-19 23:18:19,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002654292] [2020-07-19 23:18:19,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-19 23:18:19,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:19,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-19 23:18:19,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-07-19 23:18:19,918 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 25 states. [2020-07-19 23:18:20,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:20,241 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-07-19 23:18:20,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-19 23:18:20,246 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 127 [2020-07-19 23:18:20,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:20,247 INFO L225 Difference]: With dead ends: 79 [2020-07-19 23:18:20,247 INFO L226 Difference]: Without dead ends: 75 [2020-07-19 23:18:20,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=718, Invalid=1262, Unknown=0, NotChecked=0, Total=1980 [2020-07-19 23:18:20,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-19 23:18:20,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-19 23:18:20,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-19 23:18:20,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-07-19 23:18:20,253 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-07-19 23:18:20,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:20,254 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-07-19 23:18:20,254 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-19 23:18:20,254 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-07-19 23:18:20,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-19 23:18:20,255 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:20,255 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:20,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:20,470 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:20,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:20,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1598174692, now seen corresponding path program 20 times [2020-07-19 23:18:20,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:20,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018023717] [2020-07-19 23:18:20,472 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:20,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:20,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:20,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:20,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:21,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:21,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:21,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:21,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:21,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-19 23:18:21,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018023717] [2020-07-19 23:18:21,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530254564] [2020-07-19 23:18:21,422 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4ea43d4d No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:21,481 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@4ea43d4d issued 2 check-sat command(s) [2020-07-19 23:18:21,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:21,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 44 conjunts are in the unsatisfiable core [2020-07-19 23:18:21,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:21,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-19 23:18:21,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:21,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-07-19 23:18:21,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35099928] [2020-07-19 23:18:21,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-19 23:18:21,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:21,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-19 23:18:21,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-07-19 23:18:21,540 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 26 states. [2020-07-19 23:18:21,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:21,875 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-07-19 23:18:21,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-19 23:18:21,876 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 133 [2020-07-19 23:18:21,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:21,877 INFO L225 Difference]: With dead ends: 82 [2020-07-19 23:18:21,877 INFO L226 Difference]: Without dead ends: 78 [2020-07-19 23:18:21,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=785, Invalid=1377, Unknown=0, NotChecked=0, Total=2162 [2020-07-19 23:18:21,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-19 23:18:21,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-19 23:18:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-19 23:18:21,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-07-19 23:18:21,887 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-07-19 23:18:21,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:21,889 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-07-19 23:18:21,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-19 23:18:21,889 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-07-19 23:18:21,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-19 23:18:21,891 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:21,891 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:22,092 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-19 23:18:22,092 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:22,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:22,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1648275844, now seen corresponding path program 21 times [2020-07-19 23:18:22,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:22,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631762848] [2020-07-19 23:18:22,093 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:22,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-19 23:18:23,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631762848] [2020-07-19 23:18:23,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045706211] [2020-07-19 23:18:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@786dfee8 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:23,186 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@786dfee8 issued 2 check-sat command(s) [2020-07-19 23:18:23,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:23,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-19 23:18:23,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-19 23:18:23,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:23,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-07-19 23:18:23,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816170215] [2020-07-19 23:18:23,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-19 23:18:23,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:23,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-19 23:18:23,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=419, Unknown=0, NotChecked=0, Total=702 [2020-07-19 23:18:23,242 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 27 states. [2020-07-19 23:18:23,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:23,597 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2020-07-19 23:18:23,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-19 23:18:23,599 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 139 [2020-07-19 23:18:23,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:23,600 INFO L225 Difference]: With dead ends: 85 [2020-07-19 23:18:23,600 INFO L226 Difference]: Without dead ends: 81 [2020-07-19 23:18:23,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=855, Invalid=1497, Unknown=0, NotChecked=0, Total=2352 [2020-07-19 23:18:23,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-07-19 23:18:23,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-07-19 23:18:23,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-07-19 23:18:23,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-07-19 23:18:23,614 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 139 [2020-07-19 23:18:23,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:23,614 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-07-19 23:18:23,614 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-19 23:18:23,615 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-07-19 23:18:23,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-07-19 23:18:23,616 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:23,616 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:23,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-19 23:18:23,831 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:23,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:23,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1314278308, now seen corresponding path program 22 times [2020-07-19 23:18:23,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:23,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958288467] [2020-07-19 23:18:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:23,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:24,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-07-19 23:18:24,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958288467] [2020-07-19 23:18:24,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070994805] [2020-07-19 23:18:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6911d230 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:24,982 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@6911d230 issued 2 check-sat command(s) [2020-07-19 23:18:24,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:24,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 48 conjunts are in the unsatisfiable core [2020-07-19 23:18:24,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1474 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-07-19 23:18:25,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:25,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-07-19 23:18:25,057 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937434427] [2020-07-19 23:18:25,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-19 23:18:25,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:25,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-19 23:18:25,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=449, Unknown=0, NotChecked=0, Total=756 [2020-07-19 23:18:25,058 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 28 states. [2020-07-19 23:18:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:25,465 INFO L93 Difference]: Finished difference Result 88 states and 89 transitions. [2020-07-19 23:18:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-19 23:18:25,466 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 145 [2020-07-19 23:18:25,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:25,469 INFO L225 Difference]: With dead ends: 88 [2020-07-19 23:18:25,469 INFO L226 Difference]: Without dead ends: 84 [2020-07-19 23:18:25,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=928, Invalid=1622, Unknown=0, NotChecked=0, Total=2550 [2020-07-19 23:18:25,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-07-19 23:18:25,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-07-19 23:18:25,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-07-19 23:18:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2020-07-19 23:18:25,475 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 145 [2020-07-19 23:18:25,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:25,476 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2020-07-19 23:18:25,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-19 23:18:25,476 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2020-07-19 23:18:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-07-19 23:18:25,478 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:25,478 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:25,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:25,692 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:25,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:25,693 INFO L82 PathProgramCache]: Analyzing trace with hash 2015638980, now seen corresponding path program 23 times [2020-07-19 23:18:25,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:25,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782749173] [2020-07-19 23:18:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:25,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:25,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:25,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:25,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:25,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:26,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-07-19 23:18:26,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782749173] [2020-07-19 23:18:26,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349181853] [2020-07-19 23:18:26,937 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f5cd0f6 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:27,002 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2f5cd0f6 issued 2 check-sat command(s) [2020-07-19 23:18:27,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:27,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 50 conjunts are in the unsatisfiable core [2020-07-19 23:18:27,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:27,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-07-19 23:18:27,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:27,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-07-19 23:18:27,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145148233] [2020-07-19 23:18:27,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-19 23:18:27,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:27,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-19 23:18:27,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=332, Invalid=480, Unknown=0, NotChecked=0, Total=812 [2020-07-19 23:18:27,071 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand 29 states. [2020-07-19 23:18:27,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:27,460 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-07-19 23:18:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-19 23:18:27,461 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 151 [2020-07-19 23:18:27,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:27,463 INFO L225 Difference]: With dead ends: 91 [2020-07-19 23:18:27,463 INFO L226 Difference]: Without dead ends: 87 [2020-07-19 23:18:27,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1004, Invalid=1752, Unknown=0, NotChecked=0, Total=2756 [2020-07-19 23:18:27,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-07-19 23:18:27,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-07-19 23:18:27,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-07-19 23:18:27,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-07-19 23:18:27,469 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 151 [2020-07-19 23:18:27,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:27,469 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-07-19 23:18:27,469 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-19 23:18:27,470 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-07-19 23:18:27,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-07-19 23:18:27,471 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:27,471 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:27,683 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-07-19 23:18:27,684 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:27,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:27,685 INFO L82 PathProgramCache]: Analyzing trace with hash 483163804, now seen corresponding path program 24 times [2020-07-19 23:18:27,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:27,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576573303] [2020-07-19 23:18:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:27,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:27,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:27,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-19 23:18:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-07-19 23:18:28,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576573303] [2020-07-19 23:18:28,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099570438] [2020-07-19 23:18:28,949 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@132866ef No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:29,012 INFO L228 tOrderPrioritization]: Assert order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@132866ef issued 2 check-sat command(s) [2020-07-19 23:18:29,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-19 23:18:29,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 52 conjunts are in the unsatisfiable core [2020-07-19 23:18:29,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-19 23:18:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-07-19 23:18:29,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-19 23:18:29,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-07-19 23:18:29,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323567333] [2020-07-19 23:18:29,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-07-19 23:18:29,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL_SMT_AM [2020-07-19 23:18:29,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-07-19 23:18:29,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=512, Unknown=0, NotChecked=0, Total=870 [2020-07-19 23:18:29,080 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 30 states. [2020-07-19 23:18:29,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-19 23:18:29,488 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-07-19 23:18:29,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-19 23:18:29,489 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 157 [2020-07-19 23:18:29,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-19 23:18:29,490 INFO L225 Difference]: With dead ends: 94 [2020-07-19 23:18:29,490 INFO L226 Difference]: Without dead ends: 90 [2020-07-19 23:18:29,492 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1083, Invalid=1887, Unknown=0, NotChecked=0, Total=2970 [2020-07-19 23:18:29,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-07-19 23:18:29,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-07-19 23:18:29,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-07-19 23:18:29,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2020-07-19 23:18:29,498 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 157 [2020-07-19 23:18:29,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-19 23:18:29,499 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2020-07-19 23:18:29,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-07-19 23:18:29,499 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2020-07-19 23:18:29,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-07-19 23:18:29,501 INFO L414 BasicCegarLoop]: Found error trace [2020-07-19 23:18:29,501 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-19 23:18:29,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-19 23:18:29,716 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-19 23:18:29,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-19 23:18:29,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1060706820, now seen corresponding path program 25 times [2020-07-19 23:18:29,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL_SMT_AM [2020-07-19 23:18:29,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15149149] [2020-07-19 23:18:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.tracecheck.ITraceCheckPreferences$AssertCodeBlockOrder@2bfe7cbb [2020-07-19 23:18:29,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:18:29,759 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:18:29,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-19 23:18:29,791 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-07-19 23:18:29,815 INFO L174 FreeRefinementEngine]: Strategy CAMEL_SMT_AM found a feasible trace [2020-07-19 23:18:29,815 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-19 23:18:29,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-19 23:18:29,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.07 11:18:29 BoogieIcfgContainer [2020-07-19 23:18:29,876 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-19 23:18:29,878 INFO L168 Benchmark]: Toolchain (without parser) took 30026.65 ms. Allocated memory was 136.8 MB in the beginning and 687.3 MB in the end (delta: 550.5 MB). Free memory was 101.4 MB in the beginning and 625.0 MB in the end (delta: -523.7 MB). Peak memory consumption was 26.8 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:29,878 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-19 23:18:29,879 INFO L168 Benchmark]: CACSL2BoogieTranslator took 279.32 ms. Allocated memory is still 136.8 MB. Free memory was 100.9 MB in the beginning and 91.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:29,879 INFO L168 Benchmark]: Boogie Preprocessor took 25.71 ms. Allocated memory is still 136.8 MB. Free memory was 91.8 MB in the beginning and 90.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:29,880 INFO L168 Benchmark]: RCFGBuilder took 347.18 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 90.4 MB in the beginning and 168.9 MB in the end (delta: -78.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:29,880 INFO L168 Benchmark]: TraceAbstraction took 29366.73 ms. Allocated memory was 201.3 MB in the beginning and 687.3 MB in the end (delta: 486.0 MB). Free memory was 168.9 MB in the beginning and 625.0 MB in the end (delta: -456.1 MB). Peak memory consumption was 29.9 MB. Max. memory is 7.1 GB. [2020-07-19 23:18:29,882 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 136.8 MB. Free memory was 119.9 MB in the beginning and 119.7 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 279.32 ms. Allocated memory is still 136.8 MB. Free memory was 100.9 MB in the beginning and 91.8 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.71 ms. Allocated memory is still 136.8 MB. Free memory was 91.8 MB in the beginning and 90.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 347.18 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 90.4 MB in the beginning and 168.9 MB in the end (delta: -78.5 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 29366.73 ms. Allocated memory was 201.3 MB in the beginning and 687.3 MB in the end (delta: 486.0 MB). Free memory was 168.9 MB in the beginning and 625.0 MB in the end (delta: -456.1 MB). Peak memory consumption was 29.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 16]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L12] int a = 25; [L13] int b = 0; VAL [a=25, b=0] [L14] CALL, EXPR sum(a, b) VAL [\old(m)=0, \old(n)=25] [L4] COND FALSE !(n <= 0) VAL [\old(m)=0, \old(n)=25, m=0, n=25] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=24] [L4] COND FALSE !(n <= 0) VAL [\old(m)=1, \old(n)=24, m=1, n=24] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=23] [L4] COND FALSE !(n <= 0) VAL [\old(m)=2, \old(n)=23, m=2, n=23] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=22] [L4] COND FALSE !(n <= 0) VAL [\old(m)=3, \old(n)=22, m=3, n=22] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=21] [L4] COND FALSE !(n <= 0) VAL [\old(m)=4, \old(n)=21, m=4, n=21] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=20] [L4] COND FALSE !(n <= 0) VAL [\old(m)=5, \old(n)=20, m=5, n=20] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=19] [L4] COND FALSE !(n <= 0) VAL [\old(m)=6, \old(n)=19, m=6, n=19] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=18] [L4] COND FALSE !(n <= 0) VAL [\old(m)=7, \old(n)=18, m=7, n=18] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=17] [L4] COND FALSE !(n <= 0) VAL [\old(m)=8, \old(n)=17, m=8, n=17] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=16] [L4] COND FALSE !(n <= 0) VAL [\old(m)=9, \old(n)=16, m=9, n=16] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=15] [L4] COND FALSE !(n <= 0) VAL [\old(m)=10, \old(n)=15, m=10, n=15] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=14] [L4] COND FALSE !(n <= 0) VAL [\old(m)=11, \old(n)=14, m=11, n=14] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=13] [L4] COND FALSE !(n <= 0) VAL [\old(m)=12, \old(n)=13, m=12, n=13] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=12] [L4] COND FALSE !(n <= 0) VAL [\old(m)=13, \old(n)=12, m=13, n=12] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=11] [L4] COND FALSE !(n <= 0) VAL [\old(m)=14, \old(n)=11, m=14, n=11] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=10] [L4] COND FALSE !(n <= 0) VAL [\old(m)=15, \old(n)=10, m=15, n=10] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=9] [L4] COND FALSE !(n <= 0) VAL [\old(m)=16, \old(n)=9, m=16, n=9] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=8] [L4] COND FALSE !(n <= 0) VAL [\old(m)=17, \old(n)=8, m=17, n=8] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=7] [L4] COND FALSE !(n <= 0) VAL [\old(m)=18, \old(n)=7, m=18, n=7] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=6] [L4] COND FALSE !(n <= 0) VAL [\old(m)=19, \old(n)=6, m=19, n=6] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=5] [L4] COND FALSE !(n <= 0) VAL [\old(m)=20, \old(n)=5, m=20, n=5] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=21, \old(n)=4] [L4] COND FALSE !(n <= 0) VAL [\old(m)=21, \old(n)=4, m=21, n=4] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=22, \old(n)=3] [L4] COND FALSE !(n <= 0) VAL [\old(m)=22, \old(n)=3, m=22, n=3] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=23, \old(n)=2] [L4] COND FALSE !(n <= 0) VAL [\old(m)=23, \old(n)=2, m=23, n=2] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=24, \old(n)=1] [L4] COND FALSE !(n <= 0) VAL [\old(m)=24, \old(n)=1, m=24, n=1] [L7] CALL, EXPR sum(n - 1, m + 1) VAL [\old(m)=25, \old(n)=0] [L4] COND TRUE n <= 0 [L5] return m + n; VAL [\old(m)=25, \old(n)=0, \result=25, m=25, n=0] [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=24, \old(n)=1, m=24, n=1, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=23, \old(n)=2, m=23, n=2, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=22, \old(n)=3, m=22, n=3, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=21, \old(n)=4, m=21, n=4, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=20, \old(n)=5, m=20, n=5, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=19, \old(n)=6, m=19, n=6, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=18, \old(n)=7, m=18, n=7, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=17, \old(n)=8, m=17, n=8, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=16, \old(n)=9, m=16, n=9, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=15, \old(n)=10, m=15, n=10, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=14, \old(n)=11, m=14, n=11, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=13, \old(n)=12, m=13, n=12, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=12, \old(n)=13, m=12, n=13, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=11, \old(n)=14, m=11, n=14, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=10, \old(n)=15, m=10, n=15, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=9, \old(n)=16, m=9, n=16, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=8, \old(n)=17, m=8, n=17, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=7, \old(n)=18, m=7, n=18, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=6, \old(n)=19, m=6, n=19, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=5, \old(n)=20, m=5, n=20, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=4, \old(n)=21, m=4, n=21, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=3, \old(n)=22, m=3, n=22, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=2, \old(n)=23, m=2, n=23, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=1, \old(n)=24, m=1, n=24, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L7] RET, EXPR sum(n - 1, m + 1) VAL [\old(m)=0, \old(n)=25, m=0, n=25, sum(n - 1, m + 1)=25] [L7] return sum(n - 1, m + 1); [L14] RET, EXPR sum(a, b) VAL [a=25, b=0, sum(a, b)=25] [L14] int result = sum(a, b); [L15] COND TRUE result == a + b VAL [a=25, b=0, result=25] [L16] __VERIFIER_error() VAL [a=25, b=0, result=25] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 29.2s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 5.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 303 SDtfs, 1236 SDslu, 1607 SDs, 0 SdLazy, 1127 SolverSat, 294 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3513 GetRequests, 2789 SyntacticMatches, 0 SemanticMatches, 724 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5200 ImplicationChecksByTransitivity, 8.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 15.4s InterpolantComputationTime, 4400 NumberOfCodeBlocks, 3368 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 4188 ConstructedInterpolants, 0 QuantifiedInterpolants, 1139760 SizeOfPredicates, 348 NumberOfNonLiveVariables, 4814 ConjunctsInSsa, 696 ConjunctsInUnsatCore, 49 InterpolantComputations, 1 PerfectInterpolantSequences, 15000/30000 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...