/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/array-crafted/bor4.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:35:39,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:35:39,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:35:39,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:35:39,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:35:39,367 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:35:39,369 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:35:39,379 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:35:39,383 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:35:39,386 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:35:39,388 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:35:39,390 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:35:39,390 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:35:39,392 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:35:39,394 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:35:39,396 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:35:39,398 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:35:39,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:35:39,403 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:35:39,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:35:39,414 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:35:39,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:35:39,419 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:35:39,420 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:35:39,422 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:35:39,437 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:35:39,438 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:35:39,439 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:35:39,439 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 [2019-11-06 18:35:39,472 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:35:39,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:35:39,477 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:35:39,478 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:35:39,478 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:35:39,478 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:35:39,478 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:35:39,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:35:39,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:35:39,480 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:35:39,481 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:35:39,481 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:35:39,481 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:35:39,481 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:35:39,481 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:35:39,484 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:35:39,484 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:35:39,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:35:39,485 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:35:39,485 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:35:39,485 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:35:39,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:35:39,486 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:35:39,486 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:35:39,486 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:35:39,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:35:39,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:35:39,487 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:35:39,489 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:35:39,811 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:35:39,832 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:35:39,836 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:35:39,837 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:35:39,838 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:35:39,839 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/bor4.i [2019-11-06 18:35:39,911 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90bd70b4f/5ba632d9f8f64b1098bfef2e1b8df427/FLAG9bfdbf82a [2019-11-06 18:35:40,349 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:35:40,349 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/bor4.i [2019-11-06 18:35:40,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90bd70b4f/5ba632d9f8f64b1098bfef2e1b8df427/FLAG9bfdbf82a [2019-11-06 18:35:40,749 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/90bd70b4f/5ba632d9f8f64b1098bfef2e1b8df427 [2019-11-06 18:35:40,758 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:35:40,760 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:35:40,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:35:40,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:35:40,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:35:40,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:35:40" (1/1) ... [2019-11-06 18:35:40,770 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@128aa138 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:40, skipping insertion in model container [2019-11-06 18:35:40,770 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:35:40" (1/1) ... [2019-11-06 18:35:40,777 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:35:40,794 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:35:41,030 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:35:41,044 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:35:41,086 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:35:41,225 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:35:41,226 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:41 WrapperNode [2019-11-06 18:35:41,227 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:35:41,227 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:35:41,228 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:35:41,228 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:35:41,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:41" (1/1) ... [2019-11-06 18:35:41,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:41" (1/1) ... [2019-11-06 18:35:41,255 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:41" (1/1) ... [2019-11-06 18:35:41,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:41" (1/1) ... [2019-11-06 18:35:41,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:41" (1/1) ... [2019-11-06 18:35:41,282 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:41" (1/1) ... [2019-11-06 18:35:41,284 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:41" (1/1) ... [2019-11-06 18:35:41,286 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:35:41,286 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:35:41,287 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:35:41,287 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:35:41,288 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:41" (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 [2019-11-06 18:35:41,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:35:41,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:35:41,351 INFO L138 BoogieDeclarations]: Found implementation of procedure bor [2019-11-06 18:35:41,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:35:41,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:35:41,352 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:35:41,352 INFO L130 BoogieDeclarations]: Found specification of procedure bor [2019-11-06 18:35:41,352 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:35:41,352 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:35:41,353 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:35:41,353 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:35:41,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:35:41,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:35:41,353 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:35:41,613 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:35:41,614 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:35:41,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:35:41 BoogieIcfgContainer [2019-11-06 18:35:41,616 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:35:41,617 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:35:41,617 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:35:41,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:35:41,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:35:40" (1/3) ... [2019-11-06 18:35:41,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a526b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:35:41, skipping insertion in model container [2019-11-06 18:35:41,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:35:41" (2/3) ... [2019-11-06 18:35:41,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a526b3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:35:41, skipping insertion in model container [2019-11-06 18:35:41,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:35:41" (3/3) ... [2019-11-06 18:35:41,623 INFO L109 eAbstractionObserver]: Analyzing ICFG bor4.i [2019-11-06 18:35:41,634 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:35:41,643 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:35:41,658 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:35:41,701 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:35:41,702 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:35:41,702 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:35:41,702 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:35:41,702 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:35:41,703 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:35:41,703 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:35:41,703 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:35:41,748 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-11-06 18:35:41,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:35:41,760 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:41,764 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:41,768 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:41,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:41,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1283808693, now seen corresponding path program 1 times [2019-11-06 18:35:41,781 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:41,782 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996233943] [2019-11-06 18:35:41,782 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:41,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:35:42,034 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996233943] [2019-11-06 18:35:42,035 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:35:42,035 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:35:42,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775528909] [2019-11-06 18:35:42,041 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:42,042 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:42,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:42,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:35:42,058 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2019-11-06 18:35:42,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:42,172 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-11-06 18:35:42,173 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:42,174 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:35:42,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:42,183 INFO L225 Difference]: With dead ends: 54 [2019-11-06 18:35:42,183 INFO L226 Difference]: Without dead ends: 26 [2019-11-06 18:35:42,187 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:35:42,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-11-06 18:35:42,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-11-06 18:35:42,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-11-06 18:35:42,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-11-06 18:35:42,230 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-11-06 18:35:42,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:42,230 INFO L462 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-11-06 18:35:42,231 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:42,231 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-11-06 18:35:42,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-11-06 18:35:42,233 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:42,233 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:42,234 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:42,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:42,234 INFO L82 PathProgramCache]: Analyzing trace with hash 721846027, now seen corresponding path program 1 times [2019-11-06 18:35:42,235 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:42,235 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166228466] [2019-11-06 18:35:42,235 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,351 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-11-06 18:35:42,352 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166228466] [2019-11-06 18:35:42,352 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307824830] [2019-11-06 18:35:42,352 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 [2019-11-06 18:35:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:35:42,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:42,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:35:42,463 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:35:42,463 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2019-11-06 18:35:42,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847177969] [2019-11-06 18:35:42,466 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:42,466 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:42,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:42,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:35:42,467 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-11-06 18:35:42,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:42,482 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-11-06 18:35:42,483 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:42,483 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-11-06 18:35:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:42,484 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:35:42,484 INFO L226 Difference]: Without dead ends: 28 [2019-11-06 18:35:42,486 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:35:42,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-11-06 18:35:42,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-11-06 18:35:42,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-11-06 18:35:42,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-11-06 18:35:42,503 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-11-06 18:35:42,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:42,505 INFO L462 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-11-06 18:35:42,505 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:42,505 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-11-06 18:35:42,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-11-06 18:35:42,507 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:42,507 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:42,711 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:42,711 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:42,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:42,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1487444845, now seen corresponding path program 1 times [2019-11-06 18:35:42,712 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:42,712 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674346291] [2019-11-06 18:35:42,712 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-11-06 18:35:42,808 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674346291] [2019-11-06 18:35:42,808 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970491888] [2019-11-06 18:35:42,809 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:35:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:42,868 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:35:42,870 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:42,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-11-06 18:35:42,888 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:35:42,888 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2019-11-06 18:35:42,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271629306] [2019-11-06 18:35:42,891 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:42,892 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:42,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:42,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:35:42,892 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 3 states. [2019-11-06 18:35:42,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:42,906 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-11-06 18:35:42,907 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:42,907 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2019-11-06 18:35:42,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:42,908 INFO L225 Difference]: With dead ends: 46 [2019-11-06 18:35:42,908 INFO L226 Difference]: Without dead ends: 29 [2019-11-06 18:35:42,909 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:35:42,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-11-06 18:35:42,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-11-06 18:35:42,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:35:42,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-11-06 18:35:42,916 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-11-06 18:35:42,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:42,916 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-11-06 18:35:42,916 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:42,916 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-11-06 18:35:42,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-11-06 18:35:42,918 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:42,918 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:43,128 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:43,128 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:43,129 INFO L82 PathProgramCache]: Analyzing trace with hash 2063023467, now seen corresponding path program 1 times [2019-11-06 18:35:43,129 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:43,130 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40264254] [2019-11-06 18:35:43,130 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:43,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:35:43,252 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40264254] [2019-11-06 18:35:43,252 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714035294] [2019-11-06 18:35:43,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:35:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,308 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2019-11-06 18:35:43,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-11-06 18:35:43,328 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-11-06 18:35:43,328 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2019-11-06 18:35:43,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584032548] [2019-11-06 18:35:43,329 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:35:43,329 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:43,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:35:43,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:43,330 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-11-06 18:35:43,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:43,344 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-11-06 18:35:43,345 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:35:43,345 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-11-06 18:35:43,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:43,346 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:35:43,346 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:35:43,347 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:43,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:35:43,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-11-06 18:35:43,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:35:43,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-11-06 18:35:43,353 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-11-06 18:35:43,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:43,355 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-11-06 18:35:43,356 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:35:43,356 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-11-06 18:35:43,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-11-06 18:35:43,357 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:43,357 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:43,561 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:43,561 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:43,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:43,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1550668567, now seen corresponding path program 1 times [2019-11-06 18:35:43,562 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:43,563 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816258863] [2019-11-06 18:35:43,563 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,664 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2019-11-06 18:35:43,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816258863] [2019-11-06 18:35:43,665 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746321713] [2019-11-06 18:35:43,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2019-11-06 18:35:43,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:43,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:35:43,740 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:43,760 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-11-06 18:35:43,760 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:43,761 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 8 [2019-11-06 18:35:43,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494796534] [2019-11-06 18:35:43,762 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:35:43,762 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:43,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:35:43,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:35:43,763 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 8 states. [2019-11-06 18:35:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:43,901 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2019-11-06 18:35:43,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:35:43,903 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2019-11-06 18:35:43,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:43,904 INFO L225 Difference]: With dead ends: 55 [2019-11-06 18:35:43,904 INFO L226 Difference]: Without dead ends: 35 [2019-11-06 18:35:43,907 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:35:43,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2019-11-06 18:35:43,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2019-11-06 18:35:43,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-11-06 18:35:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-11-06 18:35:43,914 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 42 [2019-11-06 18:35:43,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:43,914 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-11-06 18:35:43,915 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:35:43,915 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-11-06 18:35:43,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2019-11-06 18:35:43,916 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:43,916 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:44,120 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:44,121 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:44,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:44,121 INFO L82 PathProgramCache]: Analyzing trace with hash 948091209, now seen corresponding path program 2 times [2019-11-06 18:35:44,122 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:44,122 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752959227] [2019-11-06 18:35:44,122 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:35:44,231 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752959227] [2019-11-06 18:35:44,231 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509690347] [2019-11-06 18:35:44,231 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 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 [2019-11-06 18:35:44,300 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:44,300 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:44,301 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:35:44,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:35:44,337 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:44,337 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:35:44,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603554536] [2019-11-06 18:35:44,338 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:35:44,338 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:44,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:35:44,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:44,339 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 7 states. [2019-11-06 18:35:44,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:44,425 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2019-11-06 18:35:44,426 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:35:44,426 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2019-11-06 18:35:44,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:44,427 INFO L225 Difference]: With dead ends: 58 [2019-11-06 18:35:44,427 INFO L226 Difference]: Without dead ends: 36 [2019-11-06 18:35:44,428 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:35:44,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2019-11-06 18:35:44,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2019-11-06 18:35:44,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:35:44,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2019-11-06 18:35:44,434 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 50 [2019-11-06 18:35:44,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:44,434 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2019-11-06 18:35:44,435 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:35:44,435 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2019-11-06 18:35:44,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:35:44,436 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:44,436 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:44,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:44,640 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:44,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:44,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1603223851, now seen corresponding path program 3 times [2019-11-06 18:35:44,642 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:44,643 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706961256] [2019-11-06 18:35:44,643 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:44,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:44,774 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2019-11-06 18:35:44,775 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706961256] [2019-11-06 18:35:44,775 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599630438] [2019-11-06 18:35:44,775 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 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 [2019-11-06 18:35:44,824 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:35:44,824 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:44,825 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:35:44,828 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 34 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2019-11-06 18:35:44,858 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:44,858 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 4] total 9 [2019-11-06 18:35:44,858 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643449172] [2019-11-06 18:35:44,859 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:35:44,859 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:44,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:35:44,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:44,860 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 9 states. [2019-11-06 18:35:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:44,968 INFO L93 Difference]: Finished difference Result 63 states and 72 transitions. [2019-11-06 18:35:44,968 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:35:44,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 52 [2019-11-06 18:35:44,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:44,970 INFO L225 Difference]: With dead ends: 63 [2019-11-06 18:35:44,970 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:35:44,970 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:44,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:35:44,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-06 18:35:44,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:35:44,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-11-06 18:35:44,982 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 52 [2019-11-06 18:35:44,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:44,982 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-11-06 18:35:44,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:35:44,983 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-11-06 18:35:44,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-11-06 18:35:44,986 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:44,987 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:45,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:45,188 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:45,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:45,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1402505333, now seen corresponding path program 4 times [2019-11-06 18:35:45,188 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:45,188 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47910582] [2019-11-06 18:35:45,188 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:45,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:35:45,278 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47910582] [2019-11-06 18:35:45,279 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575731656] [2019-11-06 18:35:45,279 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 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 [2019-11-06 18:35:45,334 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:45,335 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:45,336 INFO L256 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:35:45,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:35:45,377 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:45,377 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:35:45,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988386463] [2019-11-06 18:35:45,379 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:35:45,379 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:45,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:35:45,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:45,380 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 9 states. [2019-11-06 18:35:45,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:45,492 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-11-06 18:35:45,493 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:35:45,493 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2019-11-06 18:35:45,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:45,494 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:35:45,494 INFO L226 Difference]: Without dead ends: 42 [2019-11-06 18:35:45,494 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:35:45,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2019-11-06 18:35:45,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2019-11-06 18:35:45,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:35:45,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2019-11-06 18:35:45,500 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 56 [2019-11-06 18:35:45,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:45,501 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2019-11-06 18:35:45,501 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:35:45,501 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2019-11-06 18:35:45,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-11-06 18:35:45,502 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:45,502 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:45,705 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:45,706 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:45,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:45,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1995640301, now seen corresponding path program 5 times [2019-11-06 18:35:45,707 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:45,707 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157790369] [2019-11-06 18:35:45,707 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:45,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:45,836 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-11-06 18:35:45,836 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157790369] [2019-11-06 18:35:45,836 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975779632] [2019-11-06 18:35:45,836 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 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 [2019-11-06 18:35:45,932 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:35:45,932 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:45,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:35:45,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:45,969 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2019-11-06 18:35:45,969 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:45,969 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2019-11-06 18:35:45,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022717694] [2019-11-06 18:35:45,970 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:35:45,970 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:45,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:35:45,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:35:45,971 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 12 states. [2019-11-06 18:35:46,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:46,116 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2019-11-06 18:35:46,116 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:35:46,116 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 58 [2019-11-06 18:35:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:46,117 INFO L225 Difference]: With dead ends: 71 [2019-11-06 18:35:46,117 INFO L226 Difference]: Without dead ends: 47 [2019-11-06 18:35:46,118 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:35:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-11-06 18:35:46,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2019-11-06 18:35:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-11-06 18:35:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-11-06 18:35:46,124 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 58 [2019-11-06 18:35:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:46,125 INFO L462 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-11-06 18:35:46,125 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:35:46,125 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-11-06 18:35:46,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-11-06 18:35:46,126 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:46,126 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:46,329 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:46,330 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:46,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:46,330 INFO L82 PathProgramCache]: Analyzing trace with hash -1611767219, now seen corresponding path program 6 times [2019-11-06 18:35:46,331 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:46,331 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761306232] [2019-11-06 18:35:46,332 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2019-11-06 18:35:46,438 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761306232] [2019-11-06 18:35:46,438 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906659657] [2019-11-06 18:35:46,438 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 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 [2019-11-06 18:35:46,512 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:35:46,513 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:46,514 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:35:46,515 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:46,559 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2019-11-06 18:35:46,560 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:46,560 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2019-11-06 18:35:46,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594968296] [2019-11-06 18:35:46,562 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:35:46,562 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:46,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:35:46,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:35:46,563 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 14 states. [2019-11-06 18:35:46,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:46,739 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-11-06 18:35:46,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:35:46,740 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 66 [2019-11-06 18:35:46,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:46,740 INFO L225 Difference]: With dead ends: 77 [2019-11-06 18:35:46,741 INFO L226 Difference]: Without dead ends: 51 [2019-11-06 18:35:46,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:35:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2019-11-06 18:35:46,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2019-11-06 18:35:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:35:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2019-11-06 18:35:46,747 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 66 [2019-11-06 18:35:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:46,748 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2019-11-06 18:35:46,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:35:46,748 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2019-11-06 18:35:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-11-06 18:35:46,749 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:46,749 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:46,958 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:46,959 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:46,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:46,960 INFO L82 PathProgramCache]: Analyzing trace with hash -133387091, now seen corresponding path program 7 times [2019-11-06 18:35:46,960 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:46,960 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629460749] [2019-11-06 18:35:46,961 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:46,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,081 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:47,081 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629460749] [2019-11-06 18:35:47,081 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408296855] [2019-11-06 18:35:47,081 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 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 [2019-11-06 18:35:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,142 INFO L256 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:35:47,144 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:47,165 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:47,166 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:47,166 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:35:47,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348312818] [2019-11-06 18:35:47,167 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:35:47,168 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:47,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:35:47,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:35:47,168 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 12 states. [2019-11-06 18:35:47,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:47,257 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2019-11-06 18:35:47,257 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:35:47,257 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2019-11-06 18:35:47,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:47,258 INFO L225 Difference]: With dead ends: 80 [2019-11-06 18:35:47,258 INFO L226 Difference]: Without dead ends: 52 [2019-11-06 18:35:47,259 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:35:47,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-06 18:35:47,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-11-06 18:35:47,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-11-06 18:35:47,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-11-06 18:35:47,265 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 74 [2019-11-06 18:35:47,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:47,265 INFO L462 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-11-06 18:35:47,265 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:35:47,265 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-11-06 18:35:47,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-11-06 18:35:47,266 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:47,267 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 8, 8, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:47,471 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:47,472 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:47,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:47,473 INFO L82 PathProgramCache]: Analyzing trace with hash -430428529, now seen corresponding path program 8 times [2019-11-06 18:35:47,473 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:47,474 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473852717] [2019-11-06 18:35:47,474 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:47,584 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473852717] [2019-11-06 18:35:47,585 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293307592] [2019-11-06 18:35:47,585 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 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 [2019-11-06 18:35:47,646 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:47,647 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:47,648 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:35:47,651 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:47,675 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:47,676 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:47,676 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:35:47,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13559542] [2019-11-06 18:35:47,677 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:35:47,677 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:47,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:35:47,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:35:47,678 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 13 states. [2019-11-06 18:35:47,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:47,782 INFO L93 Difference]: Finished difference Result 82 states and 90 transitions. [2019-11-06 18:35:47,783 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:35:47,783 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 76 [2019-11-06 18:35:47,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:47,784 INFO L225 Difference]: With dead ends: 82 [2019-11-06 18:35:47,784 INFO L226 Difference]: Without dead ends: 54 [2019-11-06 18:35:47,785 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:35:47,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2019-11-06 18:35:47,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2019-11-06 18:35:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:35:47,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2019-11-06 18:35:47,791 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 76 [2019-11-06 18:35:47,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:47,792 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2019-11-06 18:35:47,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:35:47,792 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2019-11-06 18:35:47,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-11-06 18:35:47,793 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:47,793 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 9, 9, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:47,996 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:47,996 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:47,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:47,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1875558385, now seen corresponding path program 9 times [2019-11-06 18:35:47,997 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:47,997 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282246677] [2019-11-06 18:35:47,997 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:48,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:48,151 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2019-11-06 18:35:48,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282246677] [2019-11-06 18:35:48,152 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203151908] [2019-11-06 18:35:48,152 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 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 [2019-11-06 18:35:48,213 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:35:48,213 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:48,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:35:48,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:48,258 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 90 proven. 4 refuted. 0 times theorem prover too weak. 174 trivial. 0 not checked. [2019-11-06 18:35:48,258 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:48,258 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5] total 16 [2019-11-06 18:35:48,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479925802] [2019-11-06 18:35:48,263 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:35:48,263 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:48,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:35:48,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:35:48,265 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand 16 states. [2019-11-06 18:35:48,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:48,419 INFO L93 Difference]: Finished difference Result 87 states and 96 transitions. [2019-11-06 18:35:48,419 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:35:48,420 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 78 [2019-11-06 18:35:48,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:48,421 INFO L225 Difference]: With dead ends: 87 [2019-11-06 18:35:48,421 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:35:48,421 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:35:48,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:35:48,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2019-11-06 18:35:48,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:35:48,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2019-11-06 18:35:48,434 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 78 [2019-11-06 18:35:48,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:48,434 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2019-11-06 18:35:48,434 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:35:48,438 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2019-11-06 18:35:48,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-11-06 18:35:48,439 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:48,439 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:48,639 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:48,640 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:48,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:48,640 INFO L82 PathProgramCache]: Analyzing trace with hash 237602385, now seen corresponding path program 10 times [2019-11-06 18:35:48,641 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:48,641 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42040376] [2019-11-06 18:35:48,641 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:48,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2019-11-06 18:35:48,784 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42040376] [2019-11-06 18:35:48,784 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055044450] [2019-11-06 18:35:48,784 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 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 [2019-11-06 18:35:48,881 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:48,881 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:48,882 INFO L256 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:35:48,885 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2019-11-06 18:35:48,986 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:48,986 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2019-11-06 18:35:48,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858014098] [2019-11-06 18:35:48,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:35:48,988 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:48,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:35:48,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:35:48,989 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand 19 states. [2019-11-06 18:35:49,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:49,268 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-11-06 18:35:49,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:35:49,269 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 82 [2019-11-06 18:35:49,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:49,270 INFO L225 Difference]: With dead ends: 93 [2019-11-06 18:35:49,270 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:35:49,271 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:49,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:35:49,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2019-11-06 18:35:49,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2019-11-06 18:35:49,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 65 transitions. [2019-11-06 18:35:49,277 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 65 transitions. Word has length 82 [2019-11-06 18:35:49,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:49,277 INFO L462 AbstractCegarLoop]: Abstraction has 61 states and 65 transitions. [2019-11-06 18:35:49,278 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:35:49,279 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 65 transitions. [2019-11-06 18:35:49,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-11-06 18:35:49,280 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:49,280 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 11, 11, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:49,481 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:49,481 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:49,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:49,482 INFO L82 PathProgramCache]: Analyzing trace with hash 537663665, now seen corresponding path program 11 times [2019-11-06 18:35:49,482 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:49,482 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512962845] [2019-11-06 18:35:49,483 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:49,662 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2019-11-06 18:35:49,662 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512962845] [2019-11-06 18:35:49,662 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301395633] [2019-11-06 18:35:49,663 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 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 [2019-11-06 18:35:49,872 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 18:35:49,872 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:49,874 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:35:49,875 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 124 proven. 25 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2019-11-06 18:35:49,985 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:49,985 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2019-11-06 18:35:49,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634955578] [2019-11-06 18:35:49,986 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:35:49,986 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:49,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:35:49,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:35:49,987 INFO L87 Difference]: Start difference. First operand 61 states and 65 transitions. Second operand 21 states. [2019-11-06 18:35:50,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:50,259 INFO L93 Difference]: Finished difference Result 99 states and 111 transitions. [2019-11-06 18:35:50,259 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:35:50,259 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 90 [2019-11-06 18:35:50,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:50,260 INFO L225 Difference]: With dead ends: 99 [2019-11-06 18:35:50,261 INFO L226 Difference]: Without dead ends: 67 [2019-11-06 18:35:50,262 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=174, Invalid=528, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:35:50,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-11-06 18:35:50,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-11-06 18:35:50,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-06 18:35:50,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2019-11-06 18:35:50,268 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 90 [2019-11-06 18:35:50,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:50,268 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2019-11-06 18:35:50,268 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:35:50,268 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2019-11-06 18:35:50,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 18:35:50,270 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:50,270 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 12, 12, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:50,474 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:50,475 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:50,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:50,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1797792017, now seen corresponding path program 12 times [2019-11-06 18:35:50,476 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:50,476 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590894413] [2019-11-06 18:35:50,476 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:50,652 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2019-11-06 18:35:50,653 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590894413] [2019-11-06 18:35:50,653 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191654051] [2019-11-06 18:35:50,653 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 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 [2019-11-06 18:35:50,778 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2019-11-06 18:35:50,779 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:50,782 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:35:50,786 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 178 proven. 9 refuted. 0 times theorem prover too weak. 341 trivial. 0 not checked. [2019-11-06 18:35:50,837 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:50,838 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2019-11-06 18:35:50,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252402187] [2019-11-06 18:35:50,839 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:35:50,839 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:50,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:35:50,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:35:50,840 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand 20 states. [2019-11-06 18:35:51,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:51,039 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2019-11-06 18:35:51,039 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:35:51,040 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 98 [2019-11-06 18:35:51,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:51,041 INFO L225 Difference]: With dead ends: 105 [2019-11-06 18:35:51,042 INFO L226 Difference]: Without dead ends: 71 [2019-11-06 18:35:51,043 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:35:51,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2019-11-06 18:35:51,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2019-11-06 18:35:51,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-11-06 18:35:51,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 73 transitions. [2019-11-06 18:35:51,055 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 73 transitions. Word has length 98 [2019-11-06 18:35:51,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:51,055 INFO L462 AbstractCegarLoop]: Abstraction has 69 states and 73 transitions. [2019-11-06 18:35:51,055 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:35:51,055 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 73 transitions. [2019-11-06 18:35:51,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2019-11-06 18:35:51,056 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:51,057 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 13, 13, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:51,260 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:51,261 INFO L410 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:51,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:51,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1464793713, now seen corresponding path program 13 times [2019-11-06 18:35:51,261 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:51,261 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216358314] [2019-11-06 18:35:51,261 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:51,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:51,438 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216358314] [2019-11-06 18:35:51,438 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563296886] [2019-11-06 18:35:51,439 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 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 [2019-11-06 18:35:51,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:51,521 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:35:51,523 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:51,548 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:51,548 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:51,548 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:35:51,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019946242] [2019-11-06 18:35:51,549 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:35:51,549 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:51,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:35:51,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:35:51,550 INFO L87 Difference]: Start difference. First operand 69 states and 73 transitions. Second operand 18 states. [2019-11-06 18:35:51,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:51,650 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2019-11-06 18:35:51,650 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:35:51,650 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 102 [2019-11-06 18:35:51,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:51,651 INFO L225 Difference]: With dead ends: 108 [2019-11-06 18:35:51,652 INFO L226 Difference]: Without dead ends: 72 [2019-11-06 18:35:51,652 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:35:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2019-11-06 18:35:51,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2019-11-06 18:35:51,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-11-06 18:35:51,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-11-06 18:35:51,657 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 102 [2019-11-06 18:35:51,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:51,658 INFO L462 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-11-06 18:35:51,658 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:35:51,658 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-11-06 18:35:51,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-11-06 18:35:51,659 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:51,659 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 14, 14, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:51,862 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:51,862 INFO L410 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:51,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:51,863 INFO L82 PathProgramCache]: Analyzing trace with hash -238635693, now seen corresponding path program 14 times [2019-11-06 18:35:51,863 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:51,864 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821567485] [2019-11-06 18:35:51,864 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,074 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:52,075 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821567485] [2019-11-06 18:35:52,075 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199463672] [2019-11-06 18:35:52,075 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 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 [2019-11-06 18:35:52,151 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:52,152 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:52,153 INFO L256 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:35:52,155 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:52,180 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:52,180 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:35:52,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588129999] [2019-11-06 18:35:52,180 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:35:52,181 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:52,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:35:52,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:35:52,181 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 19 states. [2019-11-06 18:35:52,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:52,292 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2019-11-06 18:35:52,292 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:35:52,293 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-11-06 18:35:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:52,293 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:35:52,293 INFO L226 Difference]: Without dead ends: 74 [2019-11-06 18:35:52,294 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:35:52,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2019-11-06 18:35:52,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2019-11-06 18:35:52,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2019-11-06 18:35:52,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2019-11-06 18:35:52,303 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 104 [2019-11-06 18:35:52,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:52,303 INFO L462 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2019-11-06 18:35:52,303 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:35:52,303 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2019-11-06 18:35:52,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-11-06 18:35:52,305 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:52,305 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 15, 15, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:52,509 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:52,509 INFO L410 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:52,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:52,510 INFO L82 PathProgramCache]: Analyzing trace with hash -851755083, now seen corresponding path program 15 times [2019-11-06 18:35:52,510 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:52,510 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78914671] [2019-11-06 18:35:52,511 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:52,743 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 391 trivial. 0 not checked. [2019-11-06 18:35:52,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78914671] [2019-11-06 18:35:52,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747011704] [2019-11-06 18:35:52,743 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 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 [2019-11-06 18:35:52,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:35:52,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:52,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:35:52,835 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:52,929 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 178 proven. 16 refuted. 0 times theorem prover too weak. 422 trivial. 0 not checked. [2019-11-06 18:35:52,930 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:52,930 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 24 [2019-11-06 18:35:52,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927553856] [2019-11-06 18:35:52,930 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:35:52,931 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:52,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:35:52,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:52,931 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand 24 states. [2019-11-06 18:35:53,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:53,126 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2019-11-06 18:35:53,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:35:53,126 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 106 [2019-11-06 18:35:53,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:53,127 INFO L225 Difference]: With dead ends: 115 [2019-11-06 18:35:53,127 INFO L226 Difference]: Without dead ends: 79 [2019-11-06 18:35:53,128 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:53,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-11-06 18:35:53,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-11-06 18:35:53,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-11-06 18:35:53,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2019-11-06 18:35:53,131 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 106 [2019-11-06 18:35:53,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:53,132 INFO L462 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2019-11-06 18:35:53,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:35:53,132 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2019-11-06 18:35:53,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2019-11-06 18:35:53,133 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:53,133 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:53,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:53,337 INFO L410 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:53,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:53,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1460436501, now seen corresponding path program 16 times [2019-11-06 18:35:53,338 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:53,338 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80635281] [2019-11-06 18:35:53,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:53,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:53,558 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:35:53,559 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80635281] [2019-11-06 18:35:53,559 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807582230] [2019-11-06 18:35:53,559 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 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 [2019-11-06 18:35:53,661 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:35:53,661 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:53,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:35:53,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:53,691 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:35:53,691 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:53,692 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:35:53,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033596845] [2019-11-06 18:35:53,692 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:35:53,693 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:53,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:35:53,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:35:53,693 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand 21 states. [2019-11-06 18:35:53,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:53,869 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2019-11-06 18:35:53,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:35:53,870 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 110 [2019-11-06 18:35:53,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:53,871 INFO L225 Difference]: With dead ends: 118 [2019-11-06 18:35:53,871 INFO L226 Difference]: Without dead ends: 80 [2019-11-06 18:35:53,872 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:35:53,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2019-11-06 18:35:53,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2019-11-06 18:35:53,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-11-06 18:35:53,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-11-06 18:35:53,880 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 110 [2019-11-06 18:35:53,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:53,881 INFO L462 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-11-06 18:35:53,881 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:35:53,881 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-11-06 18:35:53,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-11-06 18:35:53,883 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:53,883 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:54,089 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:54,089 INFO L410 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:54,090 INFO L82 PathProgramCache]: Analyzing trace with hash 664024823, now seen corresponding path program 17 times [2019-11-06 18:35:54,090 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:54,090 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424209414] [2019-11-06 18:35:54,090 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:54,487 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2019-11-06 18:35:54,487 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424209414] [2019-11-06 18:35:54,488 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821840405] [2019-11-06 18:35:54,488 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 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 [2019-11-06 18:35:55,564 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-11-06 18:35:55,565 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:55,567 INFO L256 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:35:55,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:55,670 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-11-06 18:35:55,671 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:55,671 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2019-11-06 18:35:55,671 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273422260] [2019-11-06 18:35:55,672 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:35:55,672 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:55,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:35:55,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:35:55,673 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 28 states. [2019-11-06 18:35:56,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:56,055 INFO L93 Difference]: Finished difference Result 123 states and 135 transitions. [2019-11-06 18:35:56,055 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:35:56,056 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 112 [2019-11-06 18:35:56,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:56,057 INFO L225 Difference]: With dead ends: 123 [2019-11-06 18:35:56,057 INFO L226 Difference]: Without dead ends: 85 [2019-11-06 18:35:56,058 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:35:56,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-11-06 18:35:56,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-11-06 18:35:56,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-11-06 18:35:56,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-11-06 18:35:56,063 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 112 [2019-11-06 18:35:56,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:56,064 INFO L462 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-11-06 18:35:56,064 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:35:56,064 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-11-06 18:35:56,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-11-06 18:35:56,065 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:56,065 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 18, 18, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:56,277 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:56,278 INFO L410 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:56,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:56,278 INFO L82 PathProgramCache]: Analyzing trace with hash -683189417, now seen corresponding path program 18 times [2019-11-06 18:35:56,279 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:56,279 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864636684] [2019-11-06 18:35:56,279 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:56,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:56,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:56,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:56,515 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 523 trivial. 0 not checked. [2019-11-06 18:35:56,516 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864636684] [2019-11-06 18:35:56,516 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342276843] [2019-11-06 18:35:56,516 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 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 [2019-11-06 18:35:57,356 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:35:57,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:57,358 INFO L256 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:35:57,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:57,465 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 234 proven. 25 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2019-11-06 18:35:57,466 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:57,466 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 8] total 28 [2019-11-06 18:35:57,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923678158] [2019-11-06 18:35:57,467 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:35:57,467 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:57,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:35:57,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:35:57,468 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 28 states. [2019-11-06 18:35:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:57,682 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-11-06 18:35:57,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:35:57,684 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 120 [2019-11-06 18:35:57,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:57,685 INFO L225 Difference]: With dead ends: 129 [2019-11-06 18:35:57,685 INFO L226 Difference]: Without dead ends: 89 [2019-11-06 18:35:57,686 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=239, Invalid=517, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:35:57,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-11-06 18:35:57,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2019-11-06 18:35:57,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2019-11-06 18:35:57,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2019-11-06 18:35:57,693 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 120 [2019-11-06 18:35:57,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:57,693 INFO L462 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2019-11-06 18:35:57,694 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:35:57,694 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2019-11-06 18:35:57,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-11-06 18:35:57,695 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:57,696 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:57,900 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:57,900 INFO L410 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:57,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:57,900 INFO L82 PathProgramCache]: Analyzing trace with hash 272373175, now seen corresponding path program 19 times [2019-11-06 18:35:57,901 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:57,901 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256978814] [2019-11-06 18:35:57,901 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:57,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:58,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:58,215 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:58,215 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256978814] [2019-11-06 18:35:58,215 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702402052] [2019-11-06 18:35:58,216 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:58,309 INFO L256 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:35:58,311 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 895 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:58,335 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:58,336 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-06 18:35:58,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740131401] [2019-11-06 18:35:58,336 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:35:58,337 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:58,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:35:58,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:58,337 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand 24 states. [2019-11-06 18:35:58,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:58,490 INFO L93 Difference]: Finished difference Result 132 states and 140 transitions. [2019-11-06 18:35:58,490 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 18:35:58,490 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 124 [2019-11-06 18:35:58,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:58,491 INFO L225 Difference]: With dead ends: 132 [2019-11-06 18:35:58,491 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 18:35:58,491 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:35:58,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 18:35:58,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2019-11-06 18:35:58,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-11-06 18:35:58,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-11-06 18:35:58,496 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 124 [2019-11-06 18:35:58,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:58,496 INFO L462 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-11-06 18:35:58,496 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:35:58,496 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-11-06 18:35:58,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2019-11-06 18:35:58,497 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:58,497 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:58,697 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:58,698 INFO L410 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:58,698 INFO L82 PathProgramCache]: Analyzing trace with hash -258630887, now seen corresponding path program 20 times [2019-11-06 18:35:58,699 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:58,699 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433219016] [2019-11-06 18:35:58,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:58,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:59,008 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433219016] [2019-11-06 18:35:59,008 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602026234] [2019-11-06 18:35:59,008 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:59,105 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:35:59,106 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:59,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:35:59,110 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:35:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 934 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:59,148 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:35:59,149 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-06 18:35:59,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8247536] [2019-11-06 18:35:59,149 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:35:59,149 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:35:59,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:35:59,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:35:59,150 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 25 states. [2019-11-06 18:35:59,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:35:59,339 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2019-11-06 18:35:59,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:35:59,339 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 126 [2019-11-06 18:35:59,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:35:59,340 INFO L225 Difference]: With dead ends: 134 [2019-11-06 18:35:59,340 INFO L226 Difference]: Without dead ends: 92 [2019-11-06 18:35:59,341 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:35:59,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2019-11-06 18:35:59,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2019-11-06 18:35:59,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2019-11-06 18:35:59,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2019-11-06 18:35:59,345 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 126 [2019-11-06 18:35:59,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:35:59,346 INFO L462 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2019-11-06 18:35:59,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:35:59,346 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2019-11-06 18:35:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-11-06 18:35:59,347 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:35:59,347 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:35:59,550 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:59,550 INFO L410 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:35:59,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:35:59,551 INFO L82 PathProgramCache]: Analyzing trace with hash 547573755, now seen corresponding path program 21 times [2019-11-06 18:35:59,551 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:35:59,551 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197833808] [2019-11-06 18:35:59,552 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:35:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:59,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:35:59,850 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 534 trivial. 0 not checked. [2019-11-06 18:35:59,850 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197833808] [2019-11-06 18:35:59,850 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635323123] [2019-11-06 18:35:59,851 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:35:59,967 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-11-06 18:35:59,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:35:59,968 INFO L256 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:35:59,970 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 975 backedges. 234 proven. 36 refuted. 0 times theorem prover too weak. 705 trivial. 0 not checked. [2019-11-06 18:36:00,092 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:00,093 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2019-11-06 18:36:00,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879371396] [2019-11-06 18:36:00,093 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 18:36:00,093 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:00,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 18:36:00,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:36:00,094 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand 32 states. [2019-11-06 18:36:00,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:00,386 INFO L93 Difference]: Finished difference Result 139 states and 148 transitions. [2019-11-06 18:36:00,387 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 18:36:00,387 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 128 [2019-11-06 18:36:00,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:00,387 INFO L225 Difference]: With dead ends: 139 [2019-11-06 18:36:00,387 INFO L226 Difference]: Without dead ends: 97 [2019-11-06 18:36:00,388 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:36:00,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-06 18:36:00,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-11-06 18:36:00,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-06 18:36:00,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2019-11-06 18:36:00,394 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 128 [2019-11-06 18:36:00,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:00,394 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2019-11-06 18:36:00,394 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 18:36:00,394 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2019-11-06 18:36:00,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 18:36:00,395 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:00,395 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:00,599 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:00,600 INFO L410 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:00,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:00,600 INFO L82 PathProgramCache]: Analyzing trace with hash -829264037, now seen corresponding path program 22 times [2019-11-06 18:36:00,601 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:00,601 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237963217] [2019-11-06 18:36:00,601 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:00,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:00,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:00,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:36:00,933 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237963217] [2019-11-06 18:36:00,934 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827260302] [2019-11-06 18:36:00,934 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:01,034 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:36:01,034 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:01,036 INFO L256 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:36:01,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:01,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1031 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:36:01,086 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:01,086 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-11-06 18:36:01,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503581264] [2019-11-06 18:36:01,087 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 18:36:01,087 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:01,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 18:36:01,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:36:01,088 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand 27 states. [2019-11-06 18:36:01,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:01,307 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2019-11-06 18:36:01,307 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 18:36:01,307 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2019-11-06 18:36:01,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:01,308 INFO L225 Difference]: With dead ends: 142 [2019-11-06 18:36:01,308 INFO L226 Difference]: Without dead ends: 98 [2019-11-06 18:36:01,309 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:36:01,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-06 18:36:01,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2019-11-06 18:36:01,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-11-06 18:36:01,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-11-06 18:36:01,314 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 132 [2019-11-06 18:36:01,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:01,315 INFO L462 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-11-06 18:36:01,315 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 18:36:01,315 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-11-06 18:36:01,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2019-11-06 18:36:01,316 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:01,316 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:01,519 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:01,520 INFO L410 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:01,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:01,520 INFO L82 PathProgramCache]: Analyzing trace with hash -1781960003, now seen corresponding path program 23 times [2019-11-06 18:36:01,520 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:01,521 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682771069] [2019-11-06 18:36:01,521 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:01,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:01,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-11-06 18:36:01,915 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682771069] [2019-11-06 18:36:01,916 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136321232] [2019-11-06 18:36:01,916 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:03,344 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2019-11-06 18:36:03,345 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:03,348 INFO L256 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:36:03,351 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:03,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1076 backedges. 228 proven. 49 refuted. 0 times theorem prover too weak. 799 trivial. 0 not checked. [2019-11-06 18:36:03,558 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:03,558 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 10] total 35 [2019-11-06 18:36:03,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840067186] [2019-11-06 18:36:03,559 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-06 18:36:03,559 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:03,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-06 18:36:03,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=819, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:36:03,561 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 35 states. [2019-11-06 18:36:04,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:04,061 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2019-11-06 18:36:04,061 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-06 18:36:04,061 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 134 [2019-11-06 18:36:04,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:04,062 INFO L225 Difference]: With dead ends: 147 [2019-11-06 18:36:04,062 INFO L226 Difference]: Without dead ends: 103 [2019-11-06 18:36:04,062 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 18:36:04,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-11-06 18:36:04,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-11-06 18:36:04,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-11-06 18:36:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-11-06 18:36:04,067 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 134 [2019-11-06 18:36:04,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:04,067 INFO L462 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-11-06 18:36:04,067 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-06 18:36:04,067 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-11-06 18:36:04,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-11-06 18:36:04,068 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:04,069 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:04,273 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:04,274 INFO L410 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:04,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:04,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1049703197, now seen corresponding path program 24 times [2019-11-06 18:36:04,275 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:04,275 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328224413] [2019-11-06 18:36:04,275 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:04,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:04,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-11-06 18:36:04,715 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328224413] [2019-11-06 18:36:04,716 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722314223] [2019-11-06 18:36:04,716 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:06,901 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2019-11-06 18:36:06,901 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:06,904 INFO L256 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:36:06,906 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1264 backedges. 298 proven. 49 refuted. 0 times theorem prover too weak. 917 trivial. 0 not checked. [2019-11-06 18:36:07,041 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:07,041 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 10] total 36 [2019-11-06 18:36:07,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003927848] [2019-11-06 18:36:07,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 18:36:07,042 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:07,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 18:36:07,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:36:07,043 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 36 states. [2019-11-06 18:36:07,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:07,337 INFO L93 Difference]: Finished difference Result 153 states and 162 transitions. [2019-11-06 18:36:07,338 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 18:36:07,338 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 142 [2019-11-06 18:36:07,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:07,339 INFO L225 Difference]: With dead ends: 153 [2019-11-06 18:36:07,339 INFO L226 Difference]: Without dead ends: 107 [2019-11-06 18:36:07,340 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:36:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-11-06 18:36:07,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-11-06 18:36:07,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-11-06 18:36:07,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-11-06 18:36:07,345 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 142 [2019-11-06 18:36:07,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:07,346 INFO L462 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-11-06 18:36:07,346 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 18:36:07,346 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-11-06 18:36:07,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-11-06 18:36:07,348 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:07,348 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:07,553 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:07,554 INFO L410 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:07,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:07,554 INFO L82 PathProgramCache]: Analyzing trace with hash -932737411, now seen corresponding path program 25 times [2019-11-06 18:36:07,554 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:07,554 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403037924] [2019-11-06 18:36:07,554 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:07,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:08,105 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403037924] [2019-11-06 18:36:08,106 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960362375] [2019-11-06 18:36:08,106 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:08,208 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 18:36:08,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1328 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:08,247 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:08,248 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-11-06 18:36:08,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778669732] [2019-11-06 18:36:08,248 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 18:36:08,249 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:08,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 18:36:08,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:36:08,249 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 30 states. [2019-11-06 18:36:08,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:08,475 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2019-11-06 18:36:08,476 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 18:36:08,476 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 146 [2019-11-06 18:36:08,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:08,477 INFO L225 Difference]: With dead ends: 156 [2019-11-06 18:36:08,477 INFO L226 Difference]: Without dead ends: 108 [2019-11-06 18:36:08,478 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:36:08,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2019-11-06 18:36:08,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2019-11-06 18:36:08,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2019-11-06 18:36:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 111 transitions. [2019-11-06 18:36:08,482 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 111 transitions. Word has length 146 [2019-11-06 18:36:08,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:08,483 INFO L462 AbstractCegarLoop]: Abstraction has 107 states and 111 transitions. [2019-11-06 18:36:08,483 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 18:36:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 111 transitions. [2019-11-06 18:36:08,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-11-06 18:36:08,484 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:08,484 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:08,684 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:08,685 INFO L410 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:08,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:08,685 INFO L82 PathProgramCache]: Analyzing trace with hash 463208031, now seen corresponding path program 26 times [2019-11-06 18:36:08,685 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:08,685 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591395141] [2019-11-06 18:36:08,685 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:08,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:09,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:09,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:09,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:09,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:09,171 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591395141] [2019-11-06 18:36:09,172 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288856116] [2019-11-06 18:36:09,172 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:09,285 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:36:09,285 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:09,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 18:36:09,290 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:09,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1379 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:09,333 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:09,334 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-11-06 18:36:09,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868426245] [2019-11-06 18:36:09,334 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 18:36:09,335 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:09,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 18:36:09,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:36:09,336 INFO L87 Difference]: Start difference. First operand 107 states and 111 transitions. Second operand 31 states. [2019-11-06 18:36:09,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:09,499 INFO L93 Difference]: Finished difference Result 158 states and 166 transitions. [2019-11-06 18:36:09,499 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:36:09,500 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 148 [2019-11-06 18:36:09,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:09,501 INFO L225 Difference]: With dead ends: 158 [2019-11-06 18:36:09,502 INFO L226 Difference]: Without dead ends: 110 [2019-11-06 18:36:09,502 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:36:09,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-11-06 18:36:09,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2019-11-06 18:36:09,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-06 18:36:09,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-11-06 18:36:09,514 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 148 [2019-11-06 18:36:09,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:09,514 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-11-06 18:36:09,514 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 18:36:09,515 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-11-06 18:36:09,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-11-06 18:36:09,516 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:09,516 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 24, 24, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:09,719 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:09,720 INFO L410 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:09,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:09,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1936981441, now seen corresponding path program 27 times [2019-11-06 18:36:09,720 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:09,720 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911659509] [2019-11-06 18:36:09,720 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:10,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-11-06 18:36:10,237 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911659509] [2019-11-06 18:36:10,238 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615125008] [2019-11-06 18:36:10,238 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:10,455 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-11-06 18:36:10,456 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:10,457 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:36:10,459 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 1432 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2019-11-06 18:36:10,656 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:10,656 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2019-11-06 18:36:10,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872358426] [2019-11-06 18:36:10,657 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 18:36:10,658 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:10,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 18:36:10,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1069, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:36:10,659 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 40 states. [2019-11-06 18:36:11,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:11,289 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2019-11-06 18:36:11,290 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-11-06 18:36:11,290 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 150 [2019-11-06 18:36:11,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:11,291 INFO L225 Difference]: With dead ends: 163 [2019-11-06 18:36:11,291 INFO L226 Difference]: Without dead ends: 115 [2019-11-06 18:36:11,293 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=599, Invalid=1753, Unknown=0, NotChecked=0, Total=2352 [2019-11-06 18:36:11,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-11-06 18:36:11,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-11-06 18:36:11,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-11-06 18:36:11,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-11-06 18:36:11,301 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 150 [2019-11-06 18:36:11,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:11,301 INFO L462 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-11-06 18:36:11,301 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 18:36:11,301 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-11-06 18:36:11,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-11-06 18:36:11,302 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:11,302 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 27, 27, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:11,506 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:11,507 INFO L410 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:11,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:11,507 INFO L82 PathProgramCache]: Analyzing trace with hash 495191585, now seen corresponding path program 28 times [2019-11-06 18:36:11,507 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:11,507 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135848928] [2019-11-06 18:36:11,507 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:11,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:12,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:12,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 862 trivial. 0 not checked. [2019-11-06 18:36:12,086 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135848928] [2019-11-06 18:36:12,086 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590959613] [2019-11-06 18:36:12,086 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:12,204 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:36:12,204 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:12,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:36:12,208 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:12,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1646 backedges. 368 proven. 81 refuted. 0 times theorem prover too weak. 1197 trivial. 0 not checked. [2019-11-06 18:36:12,420 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:12,420 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-11-06 18:36:12,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268973188] [2019-11-06 18:36:12,421 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-11-06 18:36:12,421 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:12,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-11-06 18:36:12,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1190, Unknown=0, NotChecked=0, Total=1722 [2019-11-06 18:36:12,422 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 42 states. [2019-11-06 18:36:12,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:12,986 INFO L93 Difference]: Finished difference Result 169 states and 181 transitions. [2019-11-06 18:36:12,987 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-11-06 18:36:12,987 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 158 [2019-11-06 18:36:12,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:12,988 INFO L225 Difference]: With dead ends: 169 [2019-11-06 18:36:12,988 INFO L226 Difference]: Without dead ends: 119 [2019-11-06 18:36:12,990 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2019-11-06 18:36:12,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-11-06 18:36:12,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-11-06 18:36:12,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-11-06 18:36:12,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-11-06 18:36:12,998 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 158 [2019-11-06 18:36:12,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:12,998 INFO L462 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-11-06 18:36:12,998 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-11-06 18:36:12,998 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-11-06 18:36:12,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-11-06 18:36:12,999 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:12,999 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:13,203 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:13,203 INFO L410 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:13,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1033632639, now seen corresponding path program 29 times [2019-11-06 18:36:13,204 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:13,204 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516849841] [2019-11-06 18:36:13,204 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:13,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:13,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1039 trivial. 0 not checked. [2019-11-06 18:36:13,663 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516849841] [2019-11-06 18:36:13,663 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74296833] [2019-11-06 18:36:13,663 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:15,249 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2019-11-06 18:36:15,249 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:15,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:36:15,255 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1880 backedges. 444 proven. 100 refuted. 0 times theorem prover too weak. 1336 trivial. 0 not checked. [2019-11-06 18:36:15,491 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:15,491 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 13] total 44 [2019-11-06 18:36:15,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104317493] [2019-11-06 18:36:15,492 INFO L442 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-11-06 18:36:15,492 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:15,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-11-06 18:36:15,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1317, Unknown=0, NotChecked=0, Total=1892 [2019-11-06 18:36:15,493 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 44 states. [2019-11-06 18:36:16,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:16,229 INFO L93 Difference]: Finished difference Result 175 states and 187 transitions. [2019-11-06 18:36:16,230 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-11-06 18:36:16,230 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 166 [2019-11-06 18:36:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:16,231 INFO L225 Difference]: With dead ends: 175 [2019-11-06 18:36:16,231 INFO L226 Difference]: Without dead ends: 123 [2019-11-06 18:36:16,234 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=729, Invalid=2241, Unknown=0, NotChecked=0, Total=2970 [2019-11-06 18:36:16,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-11-06 18:36:16,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2019-11-06 18:36:16,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-11-06 18:36:16,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2019-11-06 18:36:16,242 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 166 [2019-11-06 18:36:16,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:16,242 INFO L462 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2019-11-06 18:36:16,242 INFO L463 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-11-06 18:36:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2019-11-06 18:36:16,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2019-11-06 18:36:16,244 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:16,245 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 30, 30, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:36:16,453 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:16,453 INFO L410 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:36:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:36:16,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2110585057, now seen corresponding path program 30 times [2019-11-06 18:36:16,455 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:36:16,455 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858237028] [2019-11-06 18:36:16,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:36:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:36:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1234 trivial. 0 not checked. [2019-11-06 18:36:16,997 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858237028] [2019-11-06 18:36:16,998 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532032509] [2019-11-06 18:36:16,998 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:36:19,596 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-06 18:36:19,596 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:36:19,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:36:19,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:36:19,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2134 backedges. 538 proven. 64 refuted. 0 times theorem prover too weak. 1532 trivial. 0 not checked. [2019-11-06 18:36:19,774 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:36:19,774 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 11] total 43 [2019-11-06 18:36:19,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271042147] [2019-11-06 18:36:19,775 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-11-06 18:36:19,775 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:36:19,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-11-06 18:36:19,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=584, Invalid=1222, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 18:36:19,776 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand 43 states. [2019-11-06 18:36:19,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:36:19,993 INFO L93 Difference]: Finished difference Result 181 states and 190 transitions. [2019-11-06 18:36:19,993 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-11-06 18:36:19,993 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 174 [2019-11-06 18:36:19,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:36:19,995 INFO L225 Difference]: With dead ends: 181 [2019-11-06 18:36:19,995 INFO L226 Difference]: Without dead ends: 127 [2019-11-06 18:36:19,996 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 173 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=584, Invalid=1222, Unknown=0, NotChecked=0, Total=1806 [2019-11-06 18:36:19,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-11-06 18:36:20,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2019-11-06 18:36:20,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-11-06 18:36:20,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2019-11-06 18:36:20,002 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 174 [2019-11-06 18:36:20,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:36:20,002 INFO L462 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2019-11-06 18:36:20,002 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-11-06 18:36:20,002 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2019-11-06 18:36:20,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-11-06 18:36:20,003 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:36:20,004 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 31, 31, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]