/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 11:12:24,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 11:12:24,364 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 11:12:24,381 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 11:12:24,382 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 11:12:24,383 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 11:12:24,384 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 11:12:24,386 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 11:12:24,388 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 11:12:24,388 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 11:12:24,389 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 11:12:24,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 11:12:24,391 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 11:12:24,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 11:12:24,393 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 11:12:24,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 11:12:24,395 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 11:12:24,396 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 11:12:24,397 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 11:12:24,399 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 11:12:24,400 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 11:12:24,402 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 11:12:24,403 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 11:12:24,404 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 11:12:24,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 11:12:24,414 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 11:12:24,414 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 11:12:24,415 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 11:12:24,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-07-07 11:12:24,430 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 11:12:24,431 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 11:12:24,432 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-07 11:12:24,432 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-07 11:12:24,432 INFO L138 SettingsManager]: * Use SBE=true [2020-07-07 11:12:24,433 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 11:12:24,433 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 11:12:24,433 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 11:12:24,433 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 11:12:24,433 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 11:12:24,434 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 11:12:24,434 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 11:12:24,434 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 11:12:24,434 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 11:12:24,434 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 11:12:24,434 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 11:12:24,435 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 11:12:24,435 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 11:12:24,435 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-07 11:12:24,435 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 11:12:24,435 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 11:12:24,436 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:12:24,436 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 11:12:24,436 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-07 11:12:24,436 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-07 11:12:24,436 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-07 11:12:24,437 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-07 11:12:24,437 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 11:12:24,437 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-07 11:12:24,437 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-07 11:12:24,713 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 11:12:24,733 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 11:12:24,737 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 11:12:24,738 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 11:12:24,739 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 11:12:24,740 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2020-07-07 11:12:24,817 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06d3b591b/dfeb23137e20461e8f8c899579ced718/FLAG27b610ae0 [2020-07-07 11:12:25,284 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 11:12:25,284 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i20_o20-1.c [2020-07-07 11:12:25,291 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06d3b591b/dfeb23137e20461e8f8c899579ced718/FLAG27b610ae0 [2020-07-07 11:12:25,672 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/06d3b591b/dfeb23137e20461e8f8c899579ced718 [2020-07-07 11:12:25,680 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 11:12:25,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 11:12:25,683 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 11:12:25,683 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 11:12:25,686 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 11:12:25,687 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:12:25" (1/1) ... [2020-07-07 11:12:25,690 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fbb5df and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:25, skipping insertion in model container [2020-07-07 11:12:25,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 11:12:25" (1/1) ... [2020-07-07 11:12:25,698 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 11:12:25,712 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 11:12:25,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:12:25,857 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 11:12:25,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 11:12:25,887 INFO L208 MainTranslator]: Completed translation [2020-07-07 11:12:25,887 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:25 WrapperNode [2020-07-07 11:12:25,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 11:12:25,888 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 11:12:25,888 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 11:12:25,889 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 11:12:25,902 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:25" (1/1) ... [2020-07-07 11:12:25,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:25" (1/1) ... [2020-07-07 11:12:25,907 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:25" (1/1) ... [2020-07-07 11:12:25,908 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:25" (1/1) ... [2020-07-07 11:12:25,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:25" (1/1) ... [2020-07-07 11:12:25,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:25" (1/1) ... [2020-07-07 11:12:25,914 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:25" (1/1) ... [2020-07-07 11:12:25,915 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 11:12:25,916 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 11:12:25,916 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 11:12:25,916 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 11:12:25,917 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:25" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 11:12:26,058 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 11:12:26,059 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 11:12:26,059 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-07 11:12:26,059 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 11:12:26,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 11:12:26,060 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 11:12:26,060 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-07 11:12:26,061 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 11:12:26,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 11:12:26,061 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 11:12:26,219 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 11:12:26,219 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-07 11:12:26,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:12:26 BoogieIcfgContainer [2020-07-07 11:12:26,223 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 11:12:26,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 11:12:26,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 11:12:26,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 11:12:26,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 11:12:25" (1/3) ... [2020-07-07 11:12:26,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f31d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:12:26, skipping insertion in model container [2020-07-07 11:12:26,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 11:12:25" (2/3) ... [2020-07-07 11:12:26,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52f31d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 11:12:26, skipping insertion in model container [2020-07-07 11:12:26,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 11:12:26" (3/3) ... [2020-07-07 11:12:26,232 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2020-07-07 11:12:26,242 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-07-07 11:12:26,249 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 11:12:26,262 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 11:12:26,286 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 11:12:26,286 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 11:12:26,286 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-07-07 11:12:26,286 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 11:12:26,286 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 11:12:26,287 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 11:12:26,287 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 11:12:26,287 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 11:12:26,304 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states. [2020-07-07 11:12:26,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-07-07 11:12:26,310 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:26,311 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:26,312 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:26,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:26,318 INFO L82 PathProgramCache]: Analyzing trace with hash -872342019, now seen corresponding path program 1 times [2020-07-07 11:12:26,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:26,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723970109] [2020-07-07 11:12:26,327 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:26,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:26,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:26,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 11:12:26,507 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723970109] [2020-07-07 11:12:26,508 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 11:12:26,508 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-07 11:12:26,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526331889] [2020-07-07 11:12:26,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-07 11:12:26,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:26,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-07 11:12:26,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-07 11:12:26,539 INFO L87 Difference]: Start difference. First operand 20 states. Second operand 5 states. [2020-07-07 11:12:26,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:26,621 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-07-07 11:12:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-07 11:12:26,624 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-07-07 11:12:26,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:26,634 INFO L225 Difference]: With dead ends: 30 [2020-07-07 11:12:26,634 INFO L226 Difference]: Without dead ends: 18 [2020-07-07 11:12:26,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-07 11:12:26,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-07-07 11:12:26,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-07-07 11:12:26,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-07-07 11:12:26,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-07-07 11:12:26,680 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2020-07-07 11:12:26,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:26,681 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-07-07 11:12:26,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-07 11:12:26,681 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-07-07 11:12:26,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-07-07 11:12:26,683 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:26,683 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:26,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 11:12:26,684 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:26,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:26,684 INFO L82 PathProgramCache]: Analyzing trace with hash -953570577, now seen corresponding path program 1 times [2020-07-07 11:12:26,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:26,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381450672] [2020-07-07 11:12:26,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:26,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:26,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:26,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:26,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:26,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:12:26,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381450672] [2020-07-07 11:12:26,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771559291] [2020-07-07 11:12:26,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:26,865 INFO L264 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 6 conjunts are in the unsatisfiable core [2020-07-07 11:12:26,872 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:26,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-07 11:12:26,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:26,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-07-07 11:12:26,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316231846] [2020-07-07 11:12:26,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 11:12:26,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:26,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 11:12:26,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 11:12:26,948 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 8 states. [2020-07-07 11:12:27,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:27,004 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-07-07 11:12:27,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-07 11:12:27,006 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2020-07-07 11:12:27,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:27,007 INFO L225 Difference]: With dead ends: 25 [2020-07-07 11:12:27,007 INFO L226 Difference]: Without dead ends: 21 [2020-07-07 11:12:27,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:12:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-07-07 11:12:27,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-07-07 11:12:27,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-07-07 11:12:27,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-07-07 11:12:27,016 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2020-07-07 11:12:27,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:27,016 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-07-07 11:12:27,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 11:12:27,017 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-07-07 11:12:27,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 11:12:27,018 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:27,018 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:27,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-07-07 11:12:27,233 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:27,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:27,234 INFO L82 PathProgramCache]: Analyzing trace with hash 397359997, now seen corresponding path program 2 times [2020-07-07 11:12:27,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:27,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110098565] [2020-07-07 11:12:27,236 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:27,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:27,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:27,416 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:12:27,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110098565] [2020-07-07 11:12:27,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120736442] [2020-07-07 11:12:27,418 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:27,453 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:12:27,453 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:27,454 INFO L264 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjunts are in the unsatisfiable core [2020-07-07 11:12:27,457 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:27,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-07 11:12:27,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:27,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-07-07 11:12:27,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007631873] [2020-07-07 11:12:27,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-07 11:12:27,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:27,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-07 11:12:27,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-07-07 11:12:27,496 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 9 states. [2020-07-07 11:12:27,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:27,567 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-07-07 11:12:27,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 11:12:27,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-07-07 11:12:27,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:27,569 INFO L225 Difference]: With dead ends: 28 [2020-07-07 11:12:27,569 INFO L226 Difference]: Without dead ends: 24 [2020-07-07 11:12:27,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:12:27,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-07-07 11:12:27,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-07-07 11:12:27,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-07-07 11:12:27,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-07-07 11:12:27,578 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2020-07-07 11:12:27,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:27,578 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-07-07 11:12:27,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-07 11:12:27,579 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-07-07 11:12:27,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-07-07 11:12:27,580 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:27,580 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:27,780 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:27,782 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:27,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:27,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1198310127, now seen corresponding path program 3 times [2020-07-07 11:12:27,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:27,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880997464] [2020-07-07 11:12:27,786 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:27,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:27,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:27,980 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:12:27,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880997464] [2020-07-07 11:12:27,981 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386828510] [2020-07-07 11:12:27,981 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:28,019 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-07-07 11:12:28,019 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:28,020 INFO L264 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-07 11:12:28,022 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-07 11:12:28,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:28,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-07-07 11:12:28,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787034561] [2020-07-07 11:12:28,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-07 11:12:28,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:28,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-07 11:12:28,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-07-07 11:12:28,061 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-07-07 11:12:28,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:28,131 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2020-07-07 11:12:28,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-07 11:12:28,131 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-07-07 11:12:28,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:28,133 INFO L225 Difference]: With dead ends: 31 [2020-07-07 11:12:28,133 INFO L226 Difference]: Without dead ends: 27 [2020-07-07 11:12:28,134 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:12:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-07-07 11:12:28,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-07-07 11:12:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-07-07 11:12:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-07-07 11:12:28,140 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2020-07-07 11:12:28,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:28,141 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-07-07 11:12:28,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-07 11:12:28,141 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-07-07 11:12:28,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-07-07 11:12:28,142 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:28,142 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:28,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:28,357 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:28,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:28,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1080764669, now seen corresponding path program 4 times [2020-07-07 11:12:28,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:28,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922798034] [2020-07-07 11:12:28,359 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,532 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-07 11:12:28,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922798034] [2020-07-07 11:12:28,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728735495] [2020-07-07 11:12:28,533 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:28,564 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:12:28,564 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:28,565 INFO L264 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 12 conjunts are in the unsatisfiable core [2020-07-07 11:12:28,568 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:28,608 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-07 11:12:28,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:28,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2020-07-07 11:12:28,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45255137] [2020-07-07 11:12:28,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-07 11:12:28,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:28,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-07 11:12:28,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-07-07 11:12:28,611 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 11 states. [2020-07-07 11:12:28,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:28,697 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-07 11:12:28,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 11:12:28,698 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2020-07-07 11:12:28,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:28,699 INFO L225 Difference]: With dead ends: 34 [2020-07-07 11:12:28,699 INFO L226 Difference]: Without dead ends: 30 [2020-07-07 11:12:28,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:12:28,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-07-07 11:12:28,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-07-07 11:12:28,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-07-07 11:12:28,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-07-07 11:12:28,707 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2020-07-07 11:12:28,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:28,707 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-07-07 11:12:28,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-07 11:12:28,707 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-07-07 11:12:28,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-07-07 11:12:28,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:28,709 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:28,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:28,923 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:28,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:28,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1752970513, now seen corresponding path program 5 times [2020-07-07 11:12:28,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:28,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890398540] [2020-07-07 11:12:28,924 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:28,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:28,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-07 11:12:29,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890398540] [2020-07-07 11:12:29,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600474327] [2020-07-07 11:12:29,088 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:29,124 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-07-07 11:12:29,124 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:29,125 INFO L264 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2020-07-07 11:12:29,128 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-07 11:12:29,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:29,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2020-07-07 11:12:29,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873040031] [2020-07-07 11:12:29,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-07 11:12:29,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:29,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-07 11:12:29,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-07-07 11:12:29,175 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand 12 states. [2020-07-07 11:12:29,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:29,289 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2020-07-07 11:12:29,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-07 11:12:29,290 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-07-07 11:12:29,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:29,291 INFO L225 Difference]: With dead ends: 37 [2020-07-07 11:12:29,291 INFO L226 Difference]: Without dead ends: 33 [2020-07-07 11:12:29,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:12:29,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-07 11:12:29,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-07 11:12:29,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-07 11:12:29,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-07 11:12:29,299 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2020-07-07 11:12:29,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:29,299 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-07 11:12:29,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-07 11:12:29,300 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-07 11:12:29,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-07-07 11:12:29,301 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:29,302 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:29,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-07-07 11:12:29,517 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:29,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:29,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1590630787, now seen corresponding path program 6 times [2020-07-07 11:12:29,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:29,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387203726] [2020-07-07 11:12:29,518 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:29,692 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-07 11:12:29,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387203726] [2020-07-07 11:12:29,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695977034] [2020-07-07 11:12:29,693 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:29,729 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-07-07 11:12:29,729 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:29,730 INFO L264 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-07-07 11:12:29,733 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:29,775 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-07 11:12:29,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:29,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-07-07 11:12:29,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280449101] [2020-07-07 11:12:29,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-07 11:12:29,777 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:29,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-07 11:12:29,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-07-07 11:12:29,778 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 13 states. [2020-07-07 11:12:29,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:29,879 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-07-07 11:12:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-07 11:12:29,879 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-07-07 11:12:29,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:29,881 INFO L225 Difference]: With dead ends: 40 [2020-07-07 11:12:29,881 INFO L226 Difference]: Without dead ends: 36 [2020-07-07 11:12:29,882 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:12:29,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-07-07 11:12:29,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-07-07 11:12:29,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-07-07 11:12:29,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-07-07 11:12:29,888 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2020-07-07 11:12:29,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:29,888 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-07-07 11:12:29,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-07 11:12:29,888 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-07-07 11:12:29,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-07-07 11:12:29,890 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:29,890 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:30,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:30,106 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:30,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:30,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1532150511, now seen corresponding path program 7 times [2020-07-07 11:12:30,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:30,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461505021] [2020-07-07 11:12:30,108 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-07 11:12:30,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461505021] [2020-07-07 11:12:30,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545351496] [2020-07-07 11:12:30,310 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:30,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,359 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-07-07 11:12:30,362 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:30,409 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-07 11:12:30,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:30,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-07-07 11:12:30,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475731891] [2020-07-07 11:12:30,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-07 11:12:30,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:30,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-07 11:12:30,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-07-07 11:12:30,412 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 14 states. [2020-07-07 11:12:30,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:30,524 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2020-07-07 11:12:30,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-07 11:12:30,524 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 55 [2020-07-07 11:12:30,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:30,526 INFO L225 Difference]: With dead ends: 43 [2020-07-07 11:12:30,526 INFO L226 Difference]: Without dead ends: 39 [2020-07-07 11:12:30,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:12:30,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-07-07 11:12:30,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-07-07 11:12:30,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-07-07 11:12:30,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-07-07 11:12:30,533 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2020-07-07 11:12:30,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:30,533 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-07-07 11:12:30,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-07 11:12:30,534 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-07-07 11:12:30,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-07-07 11:12:30,535 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:30,535 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:30,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:30,750 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:30,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:30,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1140618237, now seen corresponding path program 8 times [2020-07-07 11:12:30,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:30,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722852091] [2020-07-07 11:12:30,752 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-07 11:12:30,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722852091] [2020-07-07 11:12:30,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235408188] [2020-07-07 11:12:30,983 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:31,019 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:12:31,020 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:31,021 INFO L264 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 20 conjunts are in the unsatisfiable core [2020-07-07 11:12:31,024 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:31,078 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-07 11:12:31,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:31,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-07-07 11:12:31,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985018066] [2020-07-07 11:12:31,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-07 11:12:31,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:31,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-07 11:12:31,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-07-07 11:12:31,080 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 15 states. [2020-07-07 11:12:31,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:31,197 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-07-07 11:12:31,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-07 11:12:31,198 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 61 [2020-07-07 11:12:31,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:31,199 INFO L225 Difference]: With dead ends: 46 [2020-07-07 11:12:31,199 INFO L226 Difference]: Without dead ends: 42 [2020-07-07 11:12:31,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=191, Invalid=361, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:12:31,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-07-07 11:12:31,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-07-07 11:12:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-07-07 11:12:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-07-07 11:12:31,225 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2020-07-07 11:12:31,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:31,226 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-07-07 11:12:31,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-07 11:12:31,226 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-07-07 11:12:31,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-07-07 11:12:31,229 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:31,229 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:31,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-07-07 11:12:31,445 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:31,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:31,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1749177617, now seen corresponding path program 9 times [2020-07-07 11:12:31,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:31,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998657773] [2020-07-07 11:12:31,447 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:31,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-07 11:12:31,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998657773] [2020-07-07 11:12:31,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120949476] [2020-07-07 11:12:31,706 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:31,749 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-07-07 11:12:31,749 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:31,751 INFO L264 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 22 conjunts are in the unsatisfiable core [2020-07-07 11:12:31,754 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-07 11:12:31,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:31,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-07-07 11:12:31,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655747002] [2020-07-07 11:12:31,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-07 11:12:31,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:31,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-07 11:12:31,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2020-07-07 11:12:31,814 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 16 states. [2020-07-07 11:12:31,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:31,968 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-07 11:12:31,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-07 11:12:31,969 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 67 [2020-07-07 11:12:31,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:31,970 INFO L225 Difference]: With dead ends: 49 [2020-07-07 11:12:31,970 INFO L226 Difference]: Without dead ends: 45 [2020-07-07 11:12:31,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=424, Unknown=0, NotChecked=0, Total=650 [2020-07-07 11:12:31,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-07-07 11:12:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-07-07 11:12:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 11:12:31,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-07-07 11:12:31,977 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2020-07-07 11:12:31,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:31,977 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-07-07 11:12:31,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-07 11:12:31,978 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-07-07 11:12:31,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-07-07 11:12:31,979 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:31,979 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:32,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:32,193 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:32,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:32,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1580609155, now seen corresponding path program 10 times [2020-07-07 11:12:32,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:32,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992163153] [2020-07-07 11:12:32,194 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:32,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:32,586 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-07 11:12:32,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992163153] [2020-07-07 11:12:32,587 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436529652] [2020-07-07 11:12:32,587 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:32,628 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:12:32,628 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:32,629 INFO L264 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 24 conjunts are in the unsatisfiable core [2020-07-07 11:12:32,633 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:32,687 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-07 11:12:32,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:32,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-07-07 11:12:32,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812942656] [2020-07-07 11:12:32,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-07 11:12:32,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:32,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-07 11:12:32,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2020-07-07 11:12:32,690 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-07-07 11:12:32,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:32,848 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2020-07-07 11:12:32,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-07 11:12:32,849 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 73 [2020-07-07 11:12:32,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:32,850 INFO L225 Difference]: With dead ends: 52 [2020-07-07 11:12:32,851 INFO L226 Difference]: Without dead ends: 48 [2020-07-07 11:12:32,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2020-07-07 11:12:32,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-07 11:12:32,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-07 11:12:32,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-07 11:12:32,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-07 11:12:32,865 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2020-07-07 11:12:32,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:32,865 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-07 11:12:32,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-07 11:12:32,866 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-07 11:12:32,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-07-07 11:12:32,867 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:32,867 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:33,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:33,069 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:33,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:33,069 INFO L82 PathProgramCache]: Analyzing trace with hash -223837457, now seen corresponding path program 11 times [2020-07-07 11:12:33,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:33,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593739565] [2020-07-07 11:12:33,070 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,457 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-07 11:12:33,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593739565] [2020-07-07 11:12:33,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017865594] [2020-07-07 11:12:33,458 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:33,504 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-07-07 11:12:33,504 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:33,505 INFO L264 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 26 conjunts are in the unsatisfiable core [2020-07-07 11:12:33,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:33,559 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-07 11:12:33,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:33,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-07-07 11:12:33,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243343163] [2020-07-07 11:12:33,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-07 11:12:33,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:33,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-07 11:12:33,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-07-07 11:12:33,562 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 18 states. [2020-07-07 11:12:33,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:33,736 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-07-07 11:12:33,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-07 11:12:33,737 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 79 [2020-07-07 11:12:33,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:33,738 INFO L225 Difference]: With dead ends: 55 [2020-07-07 11:12:33,738 INFO L226 Difference]: Without dead ends: 51 [2020-07-07 11:12:33,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=305, Invalid=565, Unknown=0, NotChecked=0, Total=870 [2020-07-07 11:12:33,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-07-07 11:12:33,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-07-07 11:12:33,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-07-07 11:12:33,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-07-07 11:12:33,745 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2020-07-07 11:12:33,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:33,745 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-07-07 11:12:33,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-07 11:12:33,745 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-07-07 11:12:33,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-07-07 11:12:33,746 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:33,746 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:33,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-07-07 11:12:33,950 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:33,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:33,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1653931773, now seen corresponding path program 12 times [2020-07-07 11:12:33,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:33,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889049063] [2020-07-07 11:12:33,951 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,363 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-07 11:12:34,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889049063] [2020-07-07 11:12:34,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020445921] [2020-07-07 11:12:34,364 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:34,424 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-07-07 11:12:34,424 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:34,426 INFO L264 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 28 conjunts are in the unsatisfiable core [2020-07-07 11:12:34,428 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-07 11:12:34,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:34,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-07-07 11:12:34,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774451447] [2020-07-07 11:12:34,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-07 11:12:34,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:34,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-07 11:12:34,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2020-07-07 11:12:34,487 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 19 states. [2020-07-07 11:12:34,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:34,687 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2020-07-07 11:12:34,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-07 11:12:34,688 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-07-07 11:12:34,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:34,689 INFO L225 Difference]: With dead ends: 58 [2020-07-07 11:12:34,689 INFO L226 Difference]: Without dead ends: 54 [2020-07-07 11:12:34,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=349, Invalid=643, Unknown=0, NotChecked=0, Total=992 [2020-07-07 11:12:34,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-07-07 11:12:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-07-07 11:12:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-07-07 11:12:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-07-07 11:12:34,696 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2020-07-07 11:12:34,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:34,696 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-07-07 11:12:34,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-07 11:12:34,696 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-07-07 11:12:34,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-07-07 11:12:34,698 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:34,698 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:34,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-07-07 11:12:34,899 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:34,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:34,899 INFO L82 PathProgramCache]: Analyzing trace with hash -218674449, now seen corresponding path program 13 times [2020-07-07 11:12:34,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:34,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417910423] [2020-07-07 11:12:34,900 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,450 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-07 11:12:35,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417910423] [2020-07-07 11:12:35,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807089972] [2020-07-07 11:12:35,451 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,493 INFO L264 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjunts are in the unsatisfiable core [2020-07-07 11:12:35,495 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:35,546 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-07 11:12:35,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:35,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-07-07 11:12:35,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944844598] [2020-07-07 11:12:35,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-07 11:12:35,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:35,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-07 11:12:35,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-07-07 11:12:35,549 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 20 states. [2020-07-07 11:12:35,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:35,728 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2020-07-07 11:12:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-07 11:12:35,728 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-07-07 11:12:35,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:35,729 INFO L225 Difference]: With dead ends: 61 [2020-07-07 11:12:35,730 INFO L226 Difference]: Without dead ends: 57 [2020-07-07 11:12:35,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=396, Invalid=726, Unknown=0, NotChecked=0, Total=1122 [2020-07-07 11:12:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-07 11:12:35,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-07-07 11:12:35,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-07-07 11:12:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-07-07 11:12:35,737 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2020-07-07 11:12:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:35,737 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-07-07 11:12:35,737 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-07 11:12:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-07-07 11:12:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-07-07 11:12:35,739 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:35,739 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:35,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-07-07 11:12:35,953 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:35,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:35,953 INFO L82 PathProgramCache]: Analyzing trace with hash 492436605, now seen corresponding path program 14 times [2020-07-07 11:12:35,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:35,954 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096245705] [2020-07-07 11:12:35,954 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:35,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-07 11:12:36,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096245705] [2020-07-07 11:12:36,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272331348] [2020-07-07 11:12:36,449 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:36,497 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:12:36,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:36,499 INFO L264 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 32 conjunts are in the unsatisfiable core [2020-07-07 11:12:36,502 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-07 11:12:36,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:36,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-07-07 11:12:36,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481788014] [2020-07-07 11:12:36,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-07 11:12:36,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:36,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-07 11:12:36,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2020-07-07 11:12:36,562 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 21 states. [2020-07-07 11:12:36,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:36,765 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-07 11:12:36,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-07 11:12:36,766 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 97 [2020-07-07 11:12:36,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:36,767 INFO L225 Difference]: With dead ends: 64 [2020-07-07 11:12:36,767 INFO L226 Difference]: Without dead ends: 60 [2020-07-07 11:12:36,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=446, Invalid=814, Unknown=0, NotChecked=0, Total=1260 [2020-07-07 11:12:36,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-07-07 11:12:36,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-07-07 11:12:36,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-07-07 11:12:36,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-07-07 11:12:36,773 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2020-07-07 11:12:36,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:36,774 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-07-07 11:12:36,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-07 11:12:36,775 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-07-07 11:12:36,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-07-07 11:12:36,776 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:36,776 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:36,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:36,991 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:36,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:36,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1083048687, now seen corresponding path program 15 times [2020-07-07 11:12:36,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:36,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584963253] [2020-07-07 11:12:36,992 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-07 11:12:37,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584963253] [2020-07-07 11:12:37,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097406286] [2020-07-07 11:12:37,577 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:37,635 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-07-07 11:12:37,636 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:37,638 INFO L264 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 34 conjunts are in the unsatisfiable core [2020-07-07 11:12:37,640 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:37,702 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-07 11:12:37,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:37,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-07-07 11:12:37,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464609690] [2020-07-07 11:12:37,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-07 11:12:37,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:37,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-07 11:12:37,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-07-07 11:12:37,705 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 22 states. [2020-07-07 11:12:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:37,919 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2020-07-07 11:12:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-07 11:12:37,920 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 103 [2020-07-07 11:12:37,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:37,921 INFO L225 Difference]: With dead ends: 67 [2020-07-07 11:12:37,921 INFO L226 Difference]: Without dead ends: 63 [2020-07-07 11:12:37,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=907, Unknown=0, NotChecked=0, Total=1406 [2020-07-07 11:12:37,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-07 11:12:37,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-07 11:12:37,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-07 11:12:37,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-07 11:12:37,933 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2020-07-07 11:12:37,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:37,933 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-07 11:12:37,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-07 11:12:37,933 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-07 11:12:37,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-07-07 11:12:37,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:37,937 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:38,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-07-07 11:12:38,138 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:38,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:38,139 INFO L82 PathProgramCache]: Analyzing trace with hash 404015613, now seen corresponding path program 16 times [2020-07-07 11:12:38,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:38,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456961295] [2020-07-07 11:12:38,140 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:38,776 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-07 11:12:38,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456961295] [2020-07-07 11:12:38,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698348626] [2020-07-07 11:12:38,777 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-07 11:12:38,832 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-07-07 11:12:38,833 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:38,835 INFO L264 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 36 conjunts are in the unsatisfiable core [2020-07-07 11:12:38,837 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-07 11:12:38,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:38,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-07-07 11:12:38,908 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554488500] [2020-07-07 11:12:38,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-07 11:12:38,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:38,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-07 11:12:38,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-07-07 11:12:38,913 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 23 states. [2020-07-07 11:12:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:39,186 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2020-07-07 11:12:39,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-07 11:12:39,187 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-07-07 11:12:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:39,188 INFO L225 Difference]: With dead ends: 70 [2020-07-07 11:12:39,188 INFO L226 Difference]: Without dead ends: 66 [2020-07-07 11:12:39,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=555, Invalid=1005, Unknown=0, NotChecked=0, Total=1560 [2020-07-07 11:12:39,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-07-07 11:12:39,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-07-07 11:12:39,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-07-07 11:12:39,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2020-07-07 11:12:39,194 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2020-07-07 11:12:39,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:39,194 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2020-07-07 11:12:39,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-07 11:12:39,195 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2020-07-07 11:12:39,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-07-07 11:12:39,196 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:39,196 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:39,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-07-07 11:12:39,397 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:39,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:39,398 INFO L82 PathProgramCache]: Analyzing trace with hash -464475409, now seen corresponding path program 17 times [2020-07-07 11:12:39,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:39,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573134733] [2020-07-07 11:12:39,399 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:39,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-07 11:12:40,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573134733] [2020-07-07 11:12:40,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724074234] [2020-07-07 11:12:40,199 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-07 11:12:40,257 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-07-07 11:12:40,257 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:40,259 INFO L264 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 38 conjunts are in the unsatisfiable core [2020-07-07 11:12:40,262 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:40,345 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-07 11:12:40,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:40,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-07-07 11:12:40,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863275031] [2020-07-07 11:12:40,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-07 11:12:40,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:40,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-07 11:12:40,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2020-07-07 11:12:40,348 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 24 states. [2020-07-07 11:12:40,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:40,692 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-07-07 11:12:40,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-07 11:12:40,693 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 115 [2020-07-07 11:12:40,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:40,695 INFO L225 Difference]: With dead ends: 73 [2020-07-07 11:12:40,695 INFO L226 Difference]: Without dead ends: 69 [2020-07-07 11:12:40,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=614, Invalid=1108, Unknown=0, NotChecked=0, Total=1722 [2020-07-07 11:12:40,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-07-07 11:12:40,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-07-07 11:12:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-07-07 11:12:40,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-07-07 11:12:40,705 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2020-07-07 11:12:40,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:40,706 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-07-07 11:12:40,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-07 11:12:40,706 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-07-07 11:12:40,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-07-07 11:12:40,709 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:40,710 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:40,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-07-07 11:12:40,925 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:40,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:40,926 INFO L82 PathProgramCache]: Analyzing trace with hash 130115453, now seen corresponding path program 18 times [2020-07-07 11:12:40,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:40,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389153518] [2020-07-07 11:12:40,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:40,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:40,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:41,660 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-07 11:12:41,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389153518] [2020-07-07 11:12:41,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329142542] [2020-07-07 11:12:41,661 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-07 11:12:41,718 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-07-07 11:12:41,718 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:41,720 INFO L264 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 40 conjunts are in the unsatisfiable core [2020-07-07 11:12:41,723 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-07 11:12:41,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:41,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 25 [2020-07-07 11:12:41,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687149483] [2020-07-07 11:12:41,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-07 11:12:41,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:41,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-07 11:12:41,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=362, Unknown=0, NotChecked=0, Total=600 [2020-07-07 11:12:41,791 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 25 states. [2020-07-07 11:12:42,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:42,041 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2020-07-07 11:12:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-07 11:12:42,043 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 121 [2020-07-07 11:12:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:42,044 INFO L225 Difference]: With dead ends: 76 [2020-07-07 11:12:42,044 INFO L226 Difference]: Without dead ends: 72 [2020-07-07 11:12:42,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=676, Invalid=1216, Unknown=0, NotChecked=0, Total=1892 [2020-07-07 11:12:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-07-07 11:12:42,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-07-07 11:12:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-07-07 11:12:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-07-07 11:12:42,051 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2020-07-07 11:12:42,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:42,051 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-07-07 11:12:42,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-07 11:12:42,051 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-07-07 11:12:42,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-07-07 11:12:42,053 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:42,053 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:42,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:42,255 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:42,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:42,256 INFO L82 PathProgramCache]: Analyzing trace with hash -2010955025, now seen corresponding path program 19 times [2020-07-07 11:12:42,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:42,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857007986] [2020-07-07 11:12:42,257 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:42,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-07 11:12:43,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857007986] [2020-07-07 11:12:43,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467680606] [2020-07-07 11:12:43,174 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-07 11:12:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,231 INFO L264 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 42 conjunts are in the unsatisfiable core [2020-07-07 11:12:43,234 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:43,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-07 11:12:43,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:43,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 26 [2020-07-07 11:12:43,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755509329] [2020-07-07 11:12:43,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-07 11:12:43,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:43,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-07 11:12:43,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=390, Unknown=0, NotChecked=0, Total=650 [2020-07-07 11:12:43,309 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 26 states. [2020-07-07 11:12:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:43,617 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-07-07 11:12:43,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-07 11:12:43,618 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-07-07 11:12:43,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:43,619 INFO L225 Difference]: With dead ends: 79 [2020-07-07 11:12:43,619 INFO L226 Difference]: Without dead ends: 75 [2020-07-07 11:12:43,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 167 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=741, Invalid=1329, Unknown=0, NotChecked=0, Total=2070 [2020-07-07 11:12:43,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-07-07 11:12:43,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-07-07 11:12:43,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-07-07 11:12:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2020-07-07 11:12:43,625 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2020-07-07 11:12:43,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:43,625 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2020-07-07 11:12:43,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-07 11:12:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2020-07-07 11:12:43,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-07-07 11:12:43,627 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:43,627 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:43,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-07-07 11:12:43,840 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:43,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:43,840 INFO L82 PathProgramCache]: Analyzing trace with hash -799288067, now seen corresponding path program 20 times [2020-07-07 11:12:43,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:43,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127626979] [2020-07-07 11:12:43,841 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:43,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:44,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:44,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:44,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:44,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:44,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:44,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:44,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:45,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:45,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:45,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:45,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-07 11:12:45,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127626979] [2020-07-07 11:12:45,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688102632] [2020-07-07 11:12:45,830 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-07 11:12:45,923 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-07-07 11:12:45,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:45,927 INFO L264 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 87 conjunts are in the unsatisfiable core [2020-07-07 11:12:45,932 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-07 11:12:46,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-07-07 11:12:46,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2020-07-07 11:12:46,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674582198] [2020-07-07 11:12:46,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-07-07 11:12:46,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:46,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-07-07 11:12:46,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-07-07 11:12:46,187 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand 45 states. [2020-07-07 11:12:46,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:46,996 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-07-07 11:12:46,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-07-07 11:12:46,997 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 133 [2020-07-07 11:12:46,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:46,998 INFO L225 Difference]: With dead ends: 82 [2020-07-07 11:12:46,998 INFO L226 Difference]: Without dead ends: 78 [2020-07-07 11:12:47,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 175 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2020-07-07 11:12:47,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-07 11:12:47,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-07 11:12:47,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-07 11:12:47,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-07-07 11:12:47,004 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2020-07-07 11:12:47,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:47,005 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-07-07 11:12:47,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-07-07 11:12:47,005 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-07-07 11:12:47,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-07-07 11:12:47,006 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 11:12:47,006 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 11:12:47,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-07-07 11:12:47,209 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 11:12:47,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 11:12:47,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1226192145, now seen corresponding path program 21 times [2020-07-07 11:12:47,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-07-07 11:12:47,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302337946] [2020-07-07 11:12:47,211 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 11:12:47,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:47,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:48,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:48,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 11:12:48,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 630 proven. 42 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-07 11:12:48,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302337946] [2020-07-07 11:12:48,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69314267] [2020-07-07 11:12:48,261 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-07-07 11:12:48,324 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-07-07 11:12:48,325 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-07 11:12:48,327 INFO L264 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 46 conjunts are in the unsatisfiable core [2020-07-07 11:12:48,329 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-07-07 11:12:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-07 11:12:48,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-07-07 11:12:48,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [26] total 29 [2020-07-07 11:12:48,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25297475] [2020-07-07 11:12:48,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-07 11:12:48,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-07-07 11:12:48,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-07 11:12:48,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=523, Unknown=0, NotChecked=0, Total=812 [2020-07-07 11:12:48,461 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 26 states. [2020-07-07 11:12:49,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 11:12:49,023 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2020-07-07 11:12:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-07 11:12:49,025 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 139 [2020-07-07 11:12:49,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 11:12:49,025 INFO L225 Difference]: With dead ends: 78 [2020-07-07 11:12:49,026 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 11:12:49,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=839, Invalid=1711, Unknown=0, NotChecked=0, Total=2550 [2020-07-07 11:12:49,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 11:12:49,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 11:12:49,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 11:12:49,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 11:12:49,032 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2020-07-07 11:12:49,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 11:12:49,032 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 11:12:49,032 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-07 11:12:49,032 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 11:12:49,033 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 11:12:49,240 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-07-07 11:12:49,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 11:12:49,275 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 11:12:49,275 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:12:49,275 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-07-07 11:12:49,275 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 11:12:49,275 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 11:12:49,275 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-07-07 11:12:49,276 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 13) no Hoare annotation was computed. [2020-07-07 11:12:49,276 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 15) the Hoare annotation is: true [2020-07-07 11:12:49,276 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 15) no Hoare annotation was computed. [2020-07-07 11:12:49,276 INFO L268 CegarLoopResult]: For program point L13(line 13) no Hoare annotation was computed. [2020-07-07 11:12:49,276 INFO L268 CegarLoopResult]: For program point L12(lines 12 14) no Hoare annotation was computed. [2020-07-07 11:12:49,279 INFO L264 CegarLoopResult]: At program point L11(line 11) the Hoare annotation is: (and (<= 20 main_~input~0) (<= main_~input~0 20)) [2020-07-07 11:12:49,279 INFO L268 CegarLoopResult]: For program point L11-1(line 11) no Hoare annotation was computed. [2020-07-07 11:12:49,279 INFO L268 CegarLoopResult]: For program point L12-2(lines 9 15) no Hoare annotation was computed. [2020-07-07 11:12:49,280 INFO L268 CegarLoopResult]: For program point idFINAL(lines 4 7) no Hoare annotation was computed. [2020-07-07 11:12:49,280 INFO L268 CegarLoopResult]: For program point idEXIT(lines 4 7) no Hoare annotation was computed. [2020-07-07 11:12:49,280 INFO L271 CegarLoopResult]: At program point idENTRY(lines 4 7) the Hoare annotation is: true [2020-07-07 11:12:49,280 INFO L264 CegarLoopResult]: At program point L6(line 6) the Hoare annotation is: (= |id_#in~x| id_~x) [2020-07-07 11:12:49,280 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-07-07 11:12:49,280 INFO L268 CegarLoopResult]: For program point L6-1(line 6) no Hoare annotation was computed. [2020-07-07 11:12:49,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 11:12:49 BoogieIcfgContainer [2020-07-07 11:12:49,287 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 11:12:49,290 INFO L168 Benchmark]: Toolchain (without parser) took 23607.58 ms. Allocated memory was 144.2 MB in the beginning and 520.1 MB in the end (delta: 375.9 MB). Free memory was 102.1 MB in the beginning and 235.6 MB in the end (delta: -133.5 MB). Peak memory consumption was 242.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:49,292 INFO L168 Benchmark]: CDTParser took 1.37 ms. Allocated memory is still 144.2 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-07-07 11:12:49,299 INFO L168 Benchmark]: CACSL2BoogieTranslator took 205.35 ms. Allocated memory is still 144.2 MB. Free memory was 101.9 MB in the beginning and 92.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:49,299 INFO L168 Benchmark]: Boogie Preprocessor took 27.30 ms. Allocated memory is still 144.2 MB. Free memory was 92.7 MB in the beginning and 91.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:49,303 INFO L168 Benchmark]: RCFGBuilder took 307.20 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 91.3 MB in the beginning and 169.9 MB in the end (delta: -78.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:49,304 INFO L168 Benchmark]: TraceAbstraction took 23063.05 ms. Allocated memory was 201.3 MB in the beginning and 520.1 MB in the end (delta: 318.8 MB). Free memory was 169.2 MB in the beginning and 235.6 MB in the end (delta: -66.3 MB). Peak memory consumption was 252.5 MB. Max. memory is 7.1 GB. [2020-07-07 11:12:49,310 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.37 ms. Allocated memory is still 144.2 MB. Free memory was 120.5 MB in the beginning and 120.2 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 205.35 ms. Allocated memory is still 144.2 MB. Free memory was 101.9 MB in the beginning and 92.7 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 27.30 ms. Allocated memory is still 144.2 MB. Free memory was 92.7 MB in the beginning and 91.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 307.20 ms. Allocated memory was 144.2 MB in the beginning and 201.3 MB in the end (delta: 57.1 MB). Free memory was 91.3 MB in the beginning and 169.9 MB in the end (delta: -78.6 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23063.05 ms. Allocated memory was 201.3 MB in the beginning and 520.1 MB in the end (delta: 318.8 MB). Free memory was 169.2 MB in the beginning and 235.6 MB in the end (delta: -66.3 MB). Peak memory consumption was 252.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 22.9s, OverallIterations: 22, TraceHistogramMax: 22, AutomataDifference: 4.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 370 SDtfs, 881 SDslu, 3375 SDs, 0 SdLazy, 2199 SolverSat, 230 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2760 GetRequests, 2167 SyntacticMatches, 3 SemanticMatches, 590 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2913 ImplicationChecksByTransitivity, 7.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 9 PreInvPairs, 9 NumberOfFragments, 15 HoareAnnotationTreeSize, 9 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 4 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 11.7s InterpolantComputationTime, 3331 NumberOfCodeBlocks, 3331 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 3288 ConstructedInterpolants, 0 QuantifiedInterpolants, 836136 SizeOfPredicates, 252 NumberOfNonLiveVariables, 3885 ConjunctsInSsa, 589 ConjunctsInUnsatCore, 43 InterpolantComputations, 2 PerfectInterpolantSequences, 11466/20328 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...