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/loop-lit/gj2007.c.i.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-14 23:15:36,293 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-14 23:15:36,296 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-14 23:15:36,316 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-14 23:15:36,316 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-14 23:15:36,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-14 23:15:36,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-14 23:15:36,334 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-14 23:15:36,336 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-14 23:15:36,338 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-14 23:15:36,340 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-14 23:15:36,342 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-14 23:15:36,342 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-14 23:15:36,346 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-14 23:15:36,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-14 23:15:36,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-14 23:15:36,350 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-14 23:15:36,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-14 23:15:36,356 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-14 23:15:36,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-14 23:15:36,366 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-14 23:15:36,366 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-14 23:15:36,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-14 23:15:36,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-14 23:15:36,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-14 23:15:36,377 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-14 23:15:36,379 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-14 23:15:36,380 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-14 23:15:36,380 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-14 23:15:36,382 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-14 23:15:36,382 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-14 23:15:36,383 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-14 23:15:36,383 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-14 23:15:36,383 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-14 23:15:36,385 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-14 23:15:36,389 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-14 23:15:36,389 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 [2019-10-14 23:15:36,403 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-14 23:15:36,403 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-14 23:15:36,405 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-14 23:15:36,405 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-14 23:15:36,405 INFO L138 SettingsManager]: * Use SBE=true [2019-10-14 23:15:36,405 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-14 23:15:36,406 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-14 23:15:36,406 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-14 23:15:36,406 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-14 23:15:36,406 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-14 23:15:36,406 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-14 23:15:36,407 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-14 23:15:36,407 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-14 23:15:36,407 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-14 23:15:36,407 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-14 23:15:36,407 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-14 23:15:36,408 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-14 23:15:36,408 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-14 23:15:36,408 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-14 23:15:36,408 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-14 23:15:36,408 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-14 23:15:36,409 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-14 23:15:36,409 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-14 23:15:36,409 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-14 23:15:36,409 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-14 23:15:36,409 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-14 23:15:36,410 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-14 23:15:36,410 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-14 23:15:36,410 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-14 23:15:36,715 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-14 23:15:36,734 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-14 23:15:36,737 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-14 23:15:36,739 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-14 23:15:36,739 INFO L275 PluginConnector]: CDTParser initialized [2019-10-14 23:15:36,740 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2019-10-14 23:15:36,802 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fe76845d/083a50515d4b44e6b3f6c425b5525813/FLAG66b24dd1d [2019-10-14 23:15:37,257 INFO L306 CDTParser]: Found 1 translation units. [2019-10-14 23:15:37,257 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gj2007.c.i.p+lhb-reducer.c [2019-10-14 23:15:37,265 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fe76845d/083a50515d4b44e6b3f6c425b5525813/FLAG66b24dd1d [2019-10-14 23:15:37,630 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fe76845d/083a50515d4b44e6b3f6c425b5525813 [2019-10-14 23:15:37,639 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-14 23:15:37,641 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-14 23:15:37,642 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:37,642 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-14 23:15:37,645 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-14 23:15:37,646 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:37" (1/1) ... [2019-10-14 23:15:37,649 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e32197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:37, skipping insertion in model container [2019-10-14 23:15:37,649 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 11:15:37" (1/1) ... [2019-10-14 23:15:37,657 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-14 23:15:37,683 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-14 23:15:37,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:37,909 INFO L188 MainTranslator]: Completed pre-run [2019-10-14 23:15:37,932 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-14 23:15:37,947 INFO L192 MainTranslator]: Completed translation [2019-10-14 23:15:37,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:37 WrapperNode [2019-10-14 23:15:37,948 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-14 23:15:37,949 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-14 23:15:37,949 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-14 23:15:37,949 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-14 23:15:38,043 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:37" (1/1) ... [2019-10-14 23:15:38,044 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:37" (1/1) ... [2019-10-14 23:15:38,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:37" (1/1) ... [2019-10-14 23:15:38,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:37" (1/1) ... [2019-10-14 23:15:38,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:37" (1/1) ... [2019-10-14 23:15:38,061 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:37" (1/1) ... [2019-10-14 23:15:38,063 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:37" (1/1) ... [2019-10-14 23:15:38,065 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-14 23:15:38,065 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-14 23:15:38,065 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-14 23:15:38,066 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-14 23:15:38,066 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:37" (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 [2019-10-14 23:15:38,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-14 23:15:38,118 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-14 23:15:38,118 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-14 23:15:38,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-14 23:15:38,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-14 23:15:38,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-10-14 23:15:38,120 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-14 23:15:38,120 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-14 23:15:38,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-14 23:15:38,121 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-14 23:15:38,416 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-14 23:15:38,416 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-14 23:15:38,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:38 BoogieIcfgContainer [2019-10-14 23:15:38,418 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-14 23:15:38,419 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-14 23:15:38,419 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-14 23:15:38,422 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-14 23:15:38,422 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 11:15:37" (1/3) ... [2019-10-14 23:15:38,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2953e9cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:38, skipping insertion in model container [2019-10-14 23:15:38,423 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 11:15:37" (2/3) ... [2019-10-14 23:15:38,423 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2953e9cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 11:15:38, skipping insertion in model container [2019-10-14 23:15:38,424 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 11:15:38" (3/3) ... [2019-10-14 23:15:38,425 INFO L109 eAbstractionObserver]: Analyzing ICFG gj2007.c.i.p+lhb-reducer.c [2019-10-14 23:15:38,437 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-14 23:15:38,449 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-14 23:15:38,459 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-14 23:15:38,485 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-14 23:15:38,485 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-14 23:15:38,485 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-14 23:15:38,487 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-14 23:15:38,487 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-14 23:15:38,487 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-14 23:15:38,487 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-14 23:15:38,487 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-14 23:15:38,505 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2019-10-14 23:15:38,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 23:15:38,511 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:38,511 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:38,513 INFO L410 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:38,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:38,518 INFO L82 PathProgramCache]: Analyzing trace with hash -535062244, now seen corresponding path program 1 times [2019-10-14 23:15:38,525 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:38,526 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706143490] [2019-10-14 23:15:38,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:38,526 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:38,526 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:38,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:38,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:38,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:38,740 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706143490] [2019-10-14 23:15:38,741 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:38,741 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:15:38,742 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910403072] [2019-10-14 23:15:38,747 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:15:38,748 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:38,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:15:38,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:15:38,766 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2019-10-14 23:15:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:39,068 INFO L93 Difference]: Finished difference Result 76 states and 130 transitions. [2019-10-14 23:15:39,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-14 23:15:39,071 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2019-10-14 23:15:39,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:39,084 INFO L225 Difference]: With dead ends: 76 [2019-10-14 23:15:39,085 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:15:39,089 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:15:39,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:15:39,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2019-10-14 23:15:39,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-10-14 23:15:39,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2019-10-14 23:15:39,173 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 27 [2019-10-14 23:15:39,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:39,174 INFO L462 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2019-10-14 23:15:39,174 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:15:39,176 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2019-10-14 23:15:39,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-10-14 23:15:39,178 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:39,178 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:39,180 INFO L410 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:39,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:39,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1447563500, now seen corresponding path program 1 times [2019-10-14 23:15:39,182 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:39,182 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375521572] [2019-10-14 23:15:39,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:39,183 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:39,183 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:39,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:39,439 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375521572] [2019-10-14 23:15:39,439 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:39,439 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2019-10-14 23:15:39,439 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304252391] [2019-10-14 23:15:39,442 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-10-14 23:15:39,442 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:39,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-10-14 23:15:39,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-10-14 23:15:39,444 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 13 states. [2019-10-14 23:15:39,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:39,807 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2019-10-14 23:15:39,807 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-10-14 23:15:39,808 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2019-10-14 23:15:39,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:39,809 INFO L225 Difference]: With dead ends: 54 [2019-10-14 23:15:39,809 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:15:39,811 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2019-10-14 23:15:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:15:39,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-14 23:15:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:15:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2019-10-14 23:15:39,828 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 27 [2019-10-14 23:15:39,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:39,828 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2019-10-14 23:15:39,829 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-10-14 23:15:39,829 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2019-10-14 23:15:39,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-10-14 23:15:39,831 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:39,831 INFO L380 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:39,832 INFO L410 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:39,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:39,833 INFO L82 PathProgramCache]: Analyzing trace with hash -880735776, now seen corresponding path program 1 times [2019-10-14 23:15:39,834 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:39,834 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820744659] [2019-10-14 23:15:39,834 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:39,836 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:39,836 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:39,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:39,911 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820744659] [2019-10-14 23:15:39,912 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-14 23:15:39,912 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-14 23:15:39,912 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006554659] [2019-10-14 23:15:39,913 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-14 23:15:39,913 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:39,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-14 23:15:39,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-14 23:15:39,914 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 4 states. [2019-10-14 23:15:39,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:39,988 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2019-10-14 23:15:39,989 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-14 23:15:39,989 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2019-10-14 23:15:39,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:39,991 INFO L225 Difference]: With dead ends: 36 [2019-10-14 23:15:39,991 INFO L226 Difference]: Without dead ends: 33 [2019-10-14 23:15:39,991 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-14 23:15:39,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2019-10-14 23:15:40,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2019-10-14 23:15:40,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-10-14 23:15:40,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2019-10-14 23:15:40,006 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2019-10-14 23:15:40,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:40,006 INFO L462 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2019-10-14 23:15:40,006 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-14 23:15:40,006 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2019-10-14 23:15:40,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-10-14 23:15:40,008 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:40,008 INFO L380 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:40,009 INFO L410 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:40,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:40,009 INFO L82 PathProgramCache]: Analyzing trace with hash -286061766, now seen corresponding path program 1 times [2019-10-14 23:15:40,009 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:40,010 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991891759] [2019-10-14 23:15:40,010 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,010 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,011 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:40,214 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991891759] [2019-10-14 23:15:40,215 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237153637] [2019-10-14 23:15:40,215 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 [2019-10-14 23:15:40,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:40,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:15:40,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:40,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:40,313 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:40,313 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2019-10-14 23:15:40,313 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84889461] [2019-10-14 23:15:40,314 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-14 23:15:40,314 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:40,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-14 23:15:40,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-10-14 23:15:40,317 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 15 states. [2019-10-14 23:15:40,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:40,713 INFO L93 Difference]: Finished difference Result 42 states and 45 transitions. [2019-10-14 23:15:40,714 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-14 23:15:40,714 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 31 [2019-10-14 23:15:40,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:40,715 INFO L225 Difference]: With dead ends: 42 [2019-10-14 23:15:40,715 INFO L226 Difference]: Without dead ends: 37 [2019-10-14 23:15:40,716 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2019-10-14 23:15:40,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-10-14 23:15:40,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2019-10-14 23:15:40,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-10-14 23:15:40,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2019-10-14 23:15:40,723 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2019-10-14 23:15:40,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:40,724 INFO L462 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2019-10-14 23:15:40,724 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-14 23:15:40,724 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2019-10-14 23:15:40,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-10-14 23:15:40,725 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:40,725 INFO L380 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 1, 1] [2019-10-14 23:15:40,926 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:40,927 INFO L410 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:40,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:40,928 INFO L82 PathProgramCache]: Analyzing trace with hash -291122700, now seen corresponding path program 2 times [2019-10-14 23:15:40,928 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:40,929 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708299470] [2019-10-14 23:15:40,929 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,930 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:40,930 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:41,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:41,123 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708299470] [2019-10-14 23:15:41,124 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173652495] [2019-10-14 23:15:41,124 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:41,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:41,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:41,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2019-10-14 23:15:41,160 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:41,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:41,172 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:41,172 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 17 [2019-10-14 23:15:41,173 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921766865] [2019-10-14 23:15:41,173 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-10-14 23:15:41,173 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:41,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-10-14 23:15:41,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-10-14 23:15:41,174 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 17 states. [2019-10-14 23:15:41,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:41,544 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2019-10-14 23:15:41,544 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-10-14 23:15:41,544 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2019-10-14 23:15:41,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:41,545 INFO L225 Difference]: With dead ends: 46 [2019-10-14 23:15:41,546 INFO L226 Difference]: Without dead ends: 41 [2019-10-14 23:15:41,547 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:15:41,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-10-14 23:15:41,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2019-10-14 23:15:41,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-10-14 23:15:41,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2019-10-14 23:15:41,553 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 35 [2019-10-14 23:15:41,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:41,553 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2019-10-14 23:15:41,554 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-10-14 23:15:41,554 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2019-10-14 23:15:41,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-14 23:15:41,555 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:41,555 INFO L380 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:41,759 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:41,760 INFO L410 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:41,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:41,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1245533266, now seen corresponding path program 3 times [2019-10-14 23:15:41,761 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:41,761 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678692318] [2019-10-14 23:15:41,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:41,762 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:41,762 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:41,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:41,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:42,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678692318] [2019-10-14 23:15:42,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962061440] [2019-10-14 23:15:42,007 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:42,060 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-10-14 23:15:42,060 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:42,061 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-14 23:15:42,066 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-14 23:15:42,119 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:42,119 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 4] total 21 [2019-10-14 23:15:42,119 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575785996] [2019-10-14 23:15:42,120 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-10-14 23:15:42,120 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:42,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-10-14 23:15:42,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-10-14 23:15:42,121 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 21 states. [2019-10-14 23:15:42,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:42,606 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2019-10-14 23:15:42,606 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-10-14 23:15:42,606 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 39 [2019-10-14 23:15:42,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:42,607 INFO L225 Difference]: With dead ends: 52 [2019-10-14 23:15:42,608 INFO L226 Difference]: Without dead ends: 47 [2019-10-14 23:15:42,609 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2019-10-14 23:15:42,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2019-10-14 23:15:42,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2019-10-14 23:15:42,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-10-14 23:15:42,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2019-10-14 23:15:42,616 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 39 [2019-10-14 23:15:42,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:42,616 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2019-10-14 23:15:42,616 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-10-14 23:15:42,616 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2019-10-14 23:15:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-10-14 23:15:42,617 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:42,618 INFO L380 BasicCegarLoop]: trace histogram [9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:42,822 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:42,823 INFO L410 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:42,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:42,824 INFO L82 PathProgramCache]: Analyzing trace with hash -386885694, now seen corresponding path program 4 times [2019-10-14 23:15:42,824 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:42,824 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120307129] [2019-10-14 23:15:42,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:42,825 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:42,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:42,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:43,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120307129] [2019-10-14 23:15:43,089 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285604932] [2019-10-14 23:15:43,089 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:43,132 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:15:43,132 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:43,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2019-10-14 23:15:43,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:43,149 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-10-14 23:15:43,150 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:43,150 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 22 [2019-10-14 23:15:43,150 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543710791] [2019-10-14 23:15:43,151 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-10-14 23:15:43,151 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:43,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-10-14 23:15:43,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-10-14 23:15:43,152 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand 22 states. [2019-10-14 23:15:43,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:43,631 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2019-10-14 23:15:43,631 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-10-14 23:15:43,631 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 45 [2019-10-14 23:15:43,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:43,632 INFO L225 Difference]: With dead ends: 58 [2019-10-14 23:15:43,633 INFO L226 Difference]: Without dead ends: 52 [2019-10-14 23:15:43,634 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2019-10-14 23:15:43,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-10-14 23:15:43,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2019-10-14 23:15:43,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2019-10-14 23:15:43,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2019-10-14 23:15:43,642 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 45 [2019-10-14 23:15:43,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:43,643 INFO L462 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2019-10-14 23:15:43,643 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-10-14 23:15:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2019-10-14 23:15:43,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-14 23:15:43,644 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:43,644 INFO L380 BasicCegarLoop]: trace histogram [12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:43,846 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:43,847 INFO L410 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:43,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:43,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1880804167, now seen corresponding path program 5 times [2019-10-14 23:15:43,848 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:43,849 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960053512] [2019-10-14 23:15:43,849 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:43,849 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:43,850 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:43,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:44,164 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:44,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960053512] [2019-10-14 23:15:44,164 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078593170] [2019-10-14 23:15:44,164 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:44,204 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2019-10-14 23:15:44,205 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:44,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 8 conjunts are in the unsatisfiable core [2019-10-14 23:15:44,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:44,331 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 77 proven. 25 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2019-10-14 23:15:44,332 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:44,332 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 8] total 31 [2019-10-14 23:15:44,332 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446899408] [2019-10-14 23:15:44,333 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-10-14 23:15:44,333 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:44,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-10-14 23:15:44,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-10-14 23:15:44,334 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand 31 states. [2019-10-14 23:15:45,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:45,178 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2019-10-14 23:15:45,179 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-10-14 23:15:45,179 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 51 [2019-10-14 23:15:45,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:45,180 INFO L225 Difference]: With dead ends: 73 [2019-10-14 23:15:45,180 INFO L226 Difference]: Without dead ends: 67 [2019-10-14 23:15:45,182 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2019-10-14 23:15:45,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-10-14 23:15:45,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2019-10-14 23:15:45,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2019-10-14 23:15:45,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2019-10-14 23:15:45,192 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 51 [2019-10-14 23:15:45,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:45,192 INFO L462 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2019-10-14 23:15:45,193 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-10-14 23:15:45,193 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2019-10-14 23:15:45,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-10-14 23:15:45,194 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:45,194 INFO L380 BasicCegarLoop]: trace histogram [19, 13, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:45,398 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:45,398 INFO L410 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:45,399 INFO L82 PathProgramCache]: Analyzing trace with hash -863413544, now seen corresponding path program 6 times [2019-10-14 23:15:45,399 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:45,400 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179999967] [2019-10-14 23:15:45,400 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:45,401 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:45,401 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:45,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:45,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:45,888 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:45,889 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179999967] [2019-10-14 23:15:45,890 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227405055] [2019-10-14 23:15:45,890 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:45,986 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-10-14 23:15:45,987 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:45,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 12 conjunts are in the unsatisfiable core [2019-10-14 23:15:45,995 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:46,364 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 190 proven. 81 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2019-10-14 23:15:46,364 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:46,365 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 12] total 42 [2019-10-14 23:15:46,365 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908016392] [2019-10-14 23:15:46,366 INFO L442 AbstractCegarLoop]: Interpolant automaton has 42 states [2019-10-14 23:15:46,366 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:46,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2019-10-14 23:15:46,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2019-10-14 23:15:46,367 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand 42 states. [2019-10-14 23:15:47,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:47,633 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2019-10-14 23:15:47,634 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-10-14 23:15:47,634 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 65 [2019-10-14 23:15:47,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:47,636 INFO L225 Difference]: With dead ends: 103 [2019-10-14 23:15:47,636 INFO L226 Difference]: Without dead ends: 89 [2019-10-14 23:15:47,640 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 769 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2019-10-14 23:15:47,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2019-10-14 23:15:47,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2019-10-14 23:15:47,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-10-14 23:15:47,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2019-10-14 23:15:47,663 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 65 [2019-10-14 23:15:47,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:47,663 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2019-10-14 23:15:47,663 INFO L463 AbstractCegarLoop]: Interpolant automaton has 42 states. [2019-10-14 23:15:47,663 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2019-10-14 23:15:47,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-10-14 23:15:47,668 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:47,668 INFO L380 BasicCegarLoop]: trace histogram [30, 20, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:47,869 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:47,869 INFO L410 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:47,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:47,870 INFO L82 PathProgramCache]: Analyzing trace with hash -2110042581, now seen corresponding path program 7 times [2019-10-14 23:15:47,870 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:47,870 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500857888] [2019-10-14 23:15:47,871 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:47,871 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:47,871 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:48,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:48,683 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:48,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500857888] [2019-10-14 23:15:48,683 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977093837] [2019-10-14 23:15:48,684 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:48,746 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 31 conjunts are in the unsatisfiable core [2019-10-14 23:15:48,749 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 399 proven. 420 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 23:15:48,772 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:48,772 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 32] total 43 [2019-10-14 23:15:48,772 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173274219] [2019-10-14 23:15:48,773 INFO L442 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-10-14 23:15:48,773 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:48,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-10-14 23:15:48,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2019-10-14 23:15:48,774 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 43 states. [2019-10-14 23:15:50,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:50,086 INFO L93 Difference]: Finished difference Result 132 states and 144 transitions. [2019-10-14 23:15:50,086 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-10-14 23:15:50,086 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 87 [2019-10-14 23:15:50,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:50,088 INFO L225 Difference]: With dead ends: 132 [2019-10-14 23:15:50,088 INFO L226 Difference]: Without dead ends: 110 [2019-10-14 23:15:50,093 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2019-10-14 23:15:50,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2019-10-14 23:15:50,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2019-10-14 23:15:50,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2019-10-14 23:15:50,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2019-10-14 23:15:50,112 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 87 [2019-10-14 23:15:50,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:50,113 INFO L462 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2019-10-14 23:15:50,113 INFO L463 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-10-14 23:15:50,113 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2019-10-14 23:15:50,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2019-10-14 23:15:50,115 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:50,115 INFO L380 BasicCegarLoop]: trace histogram [41, 31, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:50,319 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:50,319 INFO L410 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:50,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:50,319 INFO L82 PathProgramCache]: Analyzing trace with hash 124988746, now seen corresponding path program 8 times [2019-10-14 23:15:50,319 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:50,320 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587065371] [2019-10-14 23:15:50,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:50,320 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:50,320 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:50,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:51,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:51,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587065371] [2019-10-14 23:15:51,404 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968571830] [2019-10-14 23:15:51,404 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:51,479 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-10-14 23:15:51,480 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:51,481 INFO L256 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 42 conjunts are in the unsatisfiable core [2019-10-14 23:15:51,484 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 608 proven. 992 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2019-10-14 23:15:51,531 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:51,531 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 43] total 54 [2019-10-14 23:15:51,532 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104111164] [2019-10-14 23:15:51,532 INFO L442 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-10-14 23:15:51,533 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:51,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-10-14 23:15:51,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2019-10-14 23:15:51,534 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand 54 states. [2019-10-14 23:15:53,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:53,563 INFO L93 Difference]: Finished difference Result 152 states and 163 transitions. [2019-10-14 23:15:53,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-10-14 23:15:53,563 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 109 [2019-10-14 23:15:53,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:53,566 INFO L225 Difference]: With dead ends: 152 [2019-10-14 23:15:53,566 INFO L226 Difference]: Without dead ends: 130 [2019-10-14 23:15:53,570 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2019-10-14 23:15:53,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2019-10-14 23:15:53,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2019-10-14 23:15:53,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-10-14 23:15:53,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2019-10-14 23:15:53,580 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 109 [2019-10-14 23:15:53,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:53,580 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2019-10-14 23:15:53,580 INFO L463 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-10-14 23:15:53,581 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2019-10-14 23:15:53,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2019-10-14 23:15:53,582 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:53,583 INFO L380 BasicCegarLoop]: trace histogram [51, 41, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:53,788 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:53,789 INFO L410 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:53,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:53,790 INFO L82 PathProgramCache]: Analyzing trace with hash -898909844, now seen corresponding path program 9 times [2019-10-14 23:15:53,790 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:53,791 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647183226] [2019-10-14 23:15:53,791 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:53,791 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:53,791 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:53,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:55,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647183226] [2019-10-14 23:15:55,318 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551041188] [2019-10-14 23:15:55,318 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:55,392 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-10-14 23:15:55,392 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:15:55,393 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 13 conjunts are in the unsatisfiable core [2019-10-14 23:15:55,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:15:55,421 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 861 proven. 100 refuted. 0 times theorem prover too weak. 1640 trivial. 0 not checked. [2019-10-14 23:15:55,421 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:15:55,422 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 13] total 64 [2019-10-14 23:15:55,422 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275975468] [2019-10-14 23:15:55,422 INFO L442 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-10-14 23:15:55,423 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:15:55,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-10-14 23:15:55,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2019-10-14 23:15:55,425 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand 64 states. [2019-10-14 23:15:58,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:15:58,018 INFO L93 Difference]: Finished difference Result 136 states and 137 transitions. [2019-10-14 23:15:58,018 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-10-14 23:15:58,019 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 129 [2019-10-14 23:15:58,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:15:58,020 INFO L225 Difference]: With dead ends: 136 [2019-10-14 23:15:58,020 INFO L226 Difference]: Without dead ends: 133 [2019-10-14 23:15:58,025 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2019-10-14 23:15:58,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2019-10-14 23:15:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2019-10-14 23:15:58,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-10-14 23:15:58,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2019-10-14 23:15:58,034 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 129 [2019-10-14 23:15:58,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:15:58,036 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2019-10-14 23:15:58,036 INFO L463 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-10-14 23:15:58,036 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2019-10-14 23:15:58,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2019-10-14 23:15:58,048 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:15:58,049 INFO L380 BasicCegarLoop]: trace histogram [52, 41, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:15:58,249 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:15:58,250 INFO L410 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:15:58,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:15:58,250 INFO L82 PathProgramCache]: Analyzing trace with hash -571471930, now seen corresponding path program 10 times [2019-10-14 23:15:58,251 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:15:58,251 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277704765] [2019-10-14 23:15:58,251 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:58,252 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:15:58,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:15:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:15:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:15:59,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277704765] [2019-10-14 23:15:59,920 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860599751] [2019-10-14 23:15:59,920 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:00,003 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-10-14 23:16:00,003 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:00,004 INFO L256 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 63 conjunts are in the unsatisfiable core [2019-10-14 23:16:00,007 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:00,059 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:00,059 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 64] total 65 [2019-10-14 23:16:00,059 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787584687] [2019-10-14 23:16:00,061 INFO L442 AbstractCegarLoop]: Interpolant automaton has 65 states [2019-10-14 23:16:00,061 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:00,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2019-10-14 23:16:00,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2019-10-14 23:16:00,063 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand 65 states. [2019-10-14 23:16:02,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:02,687 INFO L93 Difference]: Finished difference Result 138 states and 139 transitions. [2019-10-14 23:16:02,687 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2019-10-14 23:16:02,687 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 131 [2019-10-14 23:16:02,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:02,689 INFO L225 Difference]: With dead ends: 138 [2019-10-14 23:16:02,689 INFO L226 Difference]: Without dead ends: 135 [2019-10-14 23:16:02,691 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2019-10-14 23:16:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2019-10-14 23:16:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2019-10-14 23:16:02,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2019-10-14 23:16:02,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2019-10-14 23:16:02,697 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 131 [2019-10-14 23:16:02,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:02,697 INFO L462 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2019-10-14 23:16:02,698 INFO L463 AbstractCegarLoop]: Interpolant automaton has 65 states. [2019-10-14 23:16:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2019-10-14 23:16:02,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2019-10-14 23:16:02,699 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:02,699 INFO L380 BasicCegarLoop]: trace histogram [53, 41, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:02,903 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:02,903 INFO L410 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:02,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:02,904 INFO L82 PathProgramCache]: Analyzing trace with hash 563750816, now seen corresponding path program 11 times [2019-10-14 23:16:02,904 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:02,905 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69143809] [2019-10-14 23:16:02,905 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:02,905 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:02,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:02,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:04,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:04,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:04,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69143809] [2019-10-14 23:16:04,473 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459653826] [2019-10-14 23:16:04,474 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:04,603 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2019-10-14 23:16:04,604 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:04,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 29 conjunts are in the unsatisfiable core [2019-10-14 23:16:04,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 1431 proven. 676 refuted. 0 times theorem prover too weak. 702 trivial. 0 not checked. [2019-10-14 23:16:05,322 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:05,322 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 29] total 80 [2019-10-14 23:16:05,322 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464043577] [2019-10-14 23:16:05,323 INFO L442 AbstractCegarLoop]: Interpolant automaton has 80 states [2019-10-14 23:16:05,323 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:05,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2019-10-14 23:16:05,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2019-10-14 23:16:05,324 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand 80 states. [2019-10-14 23:16:08,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:08,968 INFO L93 Difference]: Finished difference Result 168 states and 183 transitions. [2019-10-14 23:16:08,969 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2019-10-14 23:16:08,969 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 133 [2019-10-14 23:16:08,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:08,971 INFO L225 Difference]: With dead ends: 168 [2019-10-14 23:16:08,971 INFO L226 Difference]: Without dead ends: 165 [2019-10-14 23:16:08,974 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2988 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2019-10-14 23:16:08,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2019-10-14 23:16:08,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2019-10-14 23:16:08,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2019-10-14 23:16:08,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2019-10-14 23:16:08,981 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 133 [2019-10-14 23:16:08,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:08,982 INFO L462 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2019-10-14 23:16:08,982 INFO L463 AbstractCegarLoop]: Interpolant automaton has 80 states. [2019-10-14 23:16:08,982 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2019-10-14 23:16:08,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2019-10-14 23:16:08,983 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:08,983 INFO L380 BasicCegarLoop]: trace histogram [68, 41, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:09,187 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:09,188 INFO L410 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:09,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:09,189 INFO L82 PathProgramCache]: Analyzing trace with hash 238893414, now seen corresponding path program 12 times [2019-10-14 23:16:09,189 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:09,189 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630118499] [2019-10-14 23:16:09,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,190 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:09,190 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:09,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:11,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:11,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630118499] [2019-10-14 23:16:11,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484920194] [2019-10-14 23:16:11,726 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:11,905 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 68 check-sat command(s) [2019-10-14 23:16:11,905 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-10-14 23:16:11,907 INFO L256 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 36 conjunts are in the unsatisfiable core [2019-10-14 23:16:11,909 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:12,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 2345 proven. 1089 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2019-10-14 23:16:12,306 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:12,306 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 36] total 87 [2019-10-14 23:16:12,306 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172781291] [2019-10-14 23:16:12,307 INFO L442 AbstractCegarLoop]: Interpolant automaton has 87 states [2019-10-14 23:16:12,307 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:12,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2019-10-14 23:16:12,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2019-10-14 23:16:12,309 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand 87 states. [2019-10-14 23:16:16,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-14 23:16:16,641 INFO L93 Difference]: Finished difference Result 182 states and 189 transitions. [2019-10-14 23:16:16,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2019-10-14 23:16:16,642 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 163 [2019-10-14 23:16:16,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-14 23:16:16,644 INFO L225 Difference]: With dead ends: 182 [2019-10-14 23:16:16,644 INFO L226 Difference]: Without dead ends: 179 [2019-10-14 23:16:16,646 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3563 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2019-10-14 23:16:16,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-10-14 23:16:16,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2019-10-14 23:16:16,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2019-10-14 23:16:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2019-10-14 23:16:16,654 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 163 [2019-10-14 23:16:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-14 23:16:16,655 INFO L462 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2019-10-14 23:16:16,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 87 states. [2019-10-14 23:16:16,655 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2019-10-14 23:16:16,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2019-10-14 23:16:16,656 INFO L372 BasicCegarLoop]: Found error trace [2019-10-14 23:16:16,657 INFO L380 BasicCegarLoop]: trace histogram [75, 41, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-14 23:16:16,857 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:16,858 INFO L410 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-14 23:16:16,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-14 23:16:16,858 INFO L82 PathProgramCache]: Analyzing trace with hash 555872220, now seen corresponding path program 13 times [2019-10-14 23:16:16,859 INFO L157 tionRefinementEngine]: Executing refinement strategy CAMEL [2019-10-14 23:16:16,859 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260066183] [2019-10-14 23:16:16,860 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:16,860 INFO L116 rtionOrderModulation]: Craig_NestedInterpolation forces the order to NOT_INCREMENTALLY [2019-10-14 23:16:16,860 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-14 23:16:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:19,551 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260066183] [2019-10-14 23:16:19,551 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721651863] [2019-10-14 23:16:19,551 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-14 23:16:19,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-14 23:16:19,672 INFO L256 TraceCheckSpWp]: Trace formula consists of 438 conjuncts, 86 conjunts are in the unsatisfiable core [2019-10-14 23:16:19,674 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-14 23:16:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-14 23:16:19,742 INFO L223 tionRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-10-14 23:16:19,743 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 87] total 88 [2019-10-14 23:16:19,743 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477623888] [2019-10-14 23:16:19,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 88 states [2019-10-14 23:16:19,743 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-10-14 23:16:19,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2019-10-14 23:16:19,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2019-10-14 23:16:19,744 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand 88 states.