/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_two_index_06.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:47:55,550 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:47:55,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:47:55,572 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:47:55,572 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:47:55,574 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:47:55,576 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:47:55,577 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:47:55,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:47:55,580 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:47:55,581 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:47:55,582 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:47:55,582 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:47:55,583 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:47:55,584 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:47:55,585 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:47:55,586 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:47:55,587 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:47:55,588 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:47:55,590 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:47:55,592 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:47:55,593 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:47:55,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:47:55,595 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:47:55,597 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:47:55,605 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:47:55,606 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:47:55,606 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:47:55,607 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-11-06 18:47:55,627 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:47:55,628 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:47:55,629 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:47:55,629 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:47:55,629 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:47:55,630 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:47:55,630 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:47:55,630 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:47:55,630 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:47:55,630 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:47:55,630 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:47:55,631 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:47:55,631 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:47:55,632 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:47:55,632 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:47:55,632 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:47:55,632 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:47:55,633 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:47:55,633 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:47:55,633 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:47:55,633 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:47:55,634 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:47:55,634 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:47:55,634 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:47:55,634 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:47:55,634 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:47:55,635 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:47:55,635 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:47:55,635 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:47:55,887 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:47:55,899 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:47:55,903 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:47:55,904 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:47:55,905 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:47:55,905 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_two_index_06.i [2019-11-06 18:47:55,983 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e159399e/678dbfdc76244507add5e3c8cd79e4e4/FLAG08b2ce832 [2019-11-06 18:47:56,438 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:47:56,441 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_two_index_06.i [2019-11-06 18:47:56,447 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e159399e/678dbfdc76244507add5e3c8cd79e4e4/FLAG08b2ce832 [2019-11-06 18:47:56,837 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e159399e/678dbfdc76244507add5e3c8cd79e4e4 [2019-11-06 18:47:56,850 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:47:56,852 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:47:56,853 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:47:56,853 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:47:56,857 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:47:56,858 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:47:56" (1/1) ... [2019-11-06 18:47:56,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@798903f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:56, skipping insertion in model container [2019-11-06 18:47:56,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:47:56" (1/1) ... [2019-11-06 18:47:56,869 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:47:56,886 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:47:57,072 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:47:57,076 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:47:57,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:47:57,120 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:47:57,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:57 WrapperNode [2019-11-06 18:47:57,120 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:47:57,121 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:47:57,121 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:47:57,121 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:47:57,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:57" (1/1) ... [2019-11-06 18:47:57,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:57" (1/1) ... [2019-11-06 18:47:57,216 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:57" (1/1) ... [2019-11-06 18:47:57,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:57" (1/1) ... [2019-11-06 18:47:57,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:57" (1/1) ... [2019-11-06 18:47:57,239 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:57" (1/1) ... [2019-11-06 18:47:57,241 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:57" (1/1) ... [2019-11-06 18:47:57,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:47:57,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:47:57,244 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:47:57,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:47:57,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:57" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:47:57,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:47:57,302 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:47:57,302 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:47:57,302 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:47:57,302 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:47:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:47:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 18:47:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:47:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:47:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:47:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:47:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:47:57,303 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:47:57,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:47:57,526 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:47:57,526 INFO L284 CfgBuilder]: Removed 3 assume(true) statements. [2019-11-06 18:47:57,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:47:57 BoogieIcfgContainer [2019-11-06 18:47:57,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:47:57,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:47:57,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:47:57,545 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:47:57,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:47:56" (1/3) ... [2019-11-06 18:47:57,546 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c865083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:47:57, skipping insertion in model container [2019-11-06 18:47:57,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:47:57" (2/3) ... [2019-11-06 18:47:57,547 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c865083 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:47:57, skipping insertion in model container [2019-11-06 18:47:57,547 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:47:57" (3/3) ... [2019-11-06 18:47:57,552 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_two_index_06.i [2019-11-06 18:47:57,578 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:47:57,592 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:47:57,607 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:47:57,630 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:47:57,630 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:47:57,631 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:47:57,631 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:47:57,631 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:47:57,631 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:47:57,631 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:47:57,631 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:47:57,646 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2019-11-06 18:47:57,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:47:57,651 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:57,653 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:57,655 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:57,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:57,659 INFO L82 PathProgramCache]: Analyzing trace with hash -2029643862, now seen corresponding path program 1 times [2019-11-06 18:47:57,666 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:57,666 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327161315] [2019-11-06 18:47:57,667 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:57,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:47:57,824 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327161315] [2019-11-06 18:47:57,825 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:57,825 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:47:57,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300079107] [2019-11-06 18:47:57,830 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:47:57,830 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:57,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:47:57,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:47:57,843 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 3 states. [2019-11-06 18:47:57,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:57,944 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2019-11-06 18:47:57,944 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:47:57,946 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2019-11-06 18:47:57,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:57,955 INFO L225 Difference]: With dead ends: 41 [2019-11-06 18:47:57,955 INFO L226 Difference]: Without dead ends: 19 [2019-11-06 18:47:57,959 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:47:57,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-11-06 18:47:57,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2019-11-06 18:47:57,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2019-11-06 18:47:57,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2019-11-06 18:47:57,999 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 15 [2019-11-06 18:47:58,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:58,000 INFO L462 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2019-11-06 18:47:58,000 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:47:58,001 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2019-11-06 18:47:58,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:47:58,001 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:58,002 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:58,002 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:58,003 INFO L82 PathProgramCache]: Analyzing trace with hash 905206694, now seen corresponding path program 1 times [2019-11-06 18:47:58,003 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:58,003 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101239522] [2019-11-06 18:47:58,004 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:58,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:58,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:47:58,084 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101239522] [2019-11-06 18:47:58,084 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:58,084 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:47:58,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90411098] [2019-11-06 18:47:58,086 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:47:58,087 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:58,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:47:58,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:47:58,088 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand 4 states. [2019-11-06 18:47:58,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:58,187 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2019-11-06 18:47:58,188 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:47:58,188 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2019-11-06 18:47:58,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:58,189 INFO L225 Difference]: With dead ends: 32 [2019-11-06 18:47:58,189 INFO L226 Difference]: Without dead ends: 20 [2019-11-06 18:47:58,190 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:47:58,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-06 18:47:58,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-06 18:47:58,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-06 18:47:58,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-06 18:47:58,197 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 15 [2019-11-06 18:47:58,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:58,197 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-06 18:47:58,197 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:47:58,198 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-06 18:47:58,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-06 18:47:58,198 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:58,198 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:58,199 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:58,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:58,199 INFO L82 PathProgramCache]: Analyzing trace with hash -764882998, now seen corresponding path program 1 times [2019-11-06 18:47:58,200 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:58,200 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131733307] [2019-11-06 18:47:58,200 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:58,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:58,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:47:58,282 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131733307] [2019-11-06 18:47:58,282 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:47:58,283 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:47:58,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638216507] [2019-11-06 18:47:58,283 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:47:58,285 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:58,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:47:58,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:47:58,286 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-11-06 18:47:58,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:58,354 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2019-11-06 18:47:58,355 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:47:58,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2019-11-06 18:47:58,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:58,357 INFO L225 Difference]: With dead ends: 34 [2019-11-06 18:47:58,358 INFO L226 Difference]: Without dead ends: 24 [2019-11-06 18:47:58,358 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:47:58,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2019-11-06 18:47:58,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2019-11-06 18:47:58,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-11-06 18:47:58,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-11-06 18:47:58,368 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-11-06 18:47:58,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:58,368 INFO L462 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-11-06 18:47:58,368 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:47:58,369 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-11-06 18:47:58,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:47:58,369 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:58,369 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:58,370 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:58,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:58,370 INFO L82 PathProgramCache]: Analyzing trace with hash -59429947, now seen corresponding path program 1 times [2019-11-06 18:47:58,370 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:58,371 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367755436] [2019-11-06 18:47:58,371 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:58,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:58,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:47:58,457 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367755436] [2019-11-06 18:47:58,457 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371750021] [2019-11-06 18:47:58,457 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:58,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:58,530 INFO L256 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:47:58,538 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:58,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-06 18:47:58,600 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:58,600 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2019-11-06 18:47:58,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295446946] [2019-11-06 18:47:58,602 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:47:58,602 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:58,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:47:58,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:47:58,604 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 7 states. [2019-11-06 18:47:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:58,738 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2019-11-06 18:47:58,739 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:47:58,739 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-06 18:47:58,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:58,740 INFO L225 Difference]: With dead ends: 43 [2019-11-06 18:47:58,740 INFO L226 Difference]: Without dead ends: 30 [2019-11-06 18:47:58,741 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:47:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-06 18:47:58,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2019-11-06 18:47:58,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-11-06 18:47:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-11-06 18:47:58,747 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 17 [2019-11-06 18:47:58,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:58,747 INFO L462 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-11-06 18:47:58,748 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:47:58,748 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-11-06 18:47:58,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2019-11-06 18:47:58,748 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:58,749 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:58,952 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:58,953 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:58,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:58,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1897825622, now seen corresponding path program 2 times [2019-11-06 18:47:58,955 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:58,955 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058241897] [2019-11-06 18:47:58,956 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-11-06 18:47:59,060 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058241897] [2019-11-06 18:47:59,060 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151700858] [2019-11-06 18:47:59,060 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 [2019-11-06 18:47:59,132 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:47:59,133 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:59,133 INFO L256 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:47:59,135 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-11-06 18:47:59,179 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:59,179 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-11-06 18:47:59,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697956473] [2019-11-06 18:47:59,182 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:47:59,182 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:59,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:47:59,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:47:59,184 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2019-11-06 18:47:59,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:59,320 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2019-11-06 18:47:59,321 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:47:59,321 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2019-11-06 18:47:59,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:59,322 INFO L225 Difference]: With dead ends: 51 [2019-11-06 18:47:59,322 INFO L226 Difference]: Without dead ends: 37 [2019-11-06 18:47:59,325 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:47:59,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-11-06 18:47:59,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2019-11-06 18:47:59,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-11-06 18:47:59,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2019-11-06 18:47:59,336 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2019-11-06 18:47:59,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:59,338 INFO L462 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2019-11-06 18:47:59,338 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:47:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2019-11-06 18:47:59,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2019-11-06 18:47:59,339 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:59,339 INFO L410 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:47:59,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:47:59,544 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:47:59,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:47:59,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1456795255, now seen corresponding path program 3 times [2019-11-06 18:47:59,545 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:47:59,546 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904464041] [2019-11-06 18:47:59,546 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:47:59,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:59,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:47:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:47:59,662 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904464041] [2019-11-06 18:47:59,662 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546690334] [2019-11-06 18:47:59,662 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 [2019-11-06 18:47:59,723 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-06 18:47:59,724 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:47:59,725 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:47:59,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:47:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:47:59,742 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:47:59,742 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:47:59,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219861979] [2019-11-06 18:47:59,743 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:47:59,743 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:47:59,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:47:59,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:47:59,744 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2019-11-06 18:47:59,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:47:59,865 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-11-06 18:47:59,865 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:47:59,866 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2019-11-06 18:47:59,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:47:59,867 INFO L225 Difference]: With dead ends: 51 [2019-11-06 18:47:59,867 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:47:59,867 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:47:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:47:59,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 29. [2019-11-06 18:47:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-11-06 18:47:59,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2019-11-06 18:47:59,874 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 24 [2019-11-06 18:47:59,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:47:59,874 INFO L462 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2019-11-06 18:47:59,874 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:47:59,875 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2019-11-06 18:47:59,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:47:59,875 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:47:59,876 INFO L410 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:00,079 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:00,079 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:00,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:00,080 INFO L82 PathProgramCache]: Analyzing trace with hash -33873434, now seen corresponding path program 4 times [2019-11-06 18:48:00,080 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:00,081 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794734594] [2019-11-06 18:48:00,081 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2019-11-06 18:48:00,183 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794734594] [2019-11-06 18:48:00,183 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505714739] [2019-11-06 18:48:00,183 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 [2019-11-06 18:48:00,240 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:48:00,240 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:00,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:48:00,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:00,335 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-11-06 18:48:00,335 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:00,335 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2019-11-06 18:48:00,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586759280] [2019-11-06 18:48:00,337 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:48:00,338 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:00,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:48:00,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:48:00,340 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 15 states. [2019-11-06 18:48:00,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:00,516 INFO L93 Difference]: Finished difference Result 66 states and 80 transitions. [2019-11-06 18:48:00,517 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:48:00,517 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 25 [2019-11-06 18:48:00,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:00,518 INFO L225 Difference]: With dead ends: 66 [2019-11-06 18:48:00,518 INFO L226 Difference]: Without dead ends: 50 [2019-11-06 18:48:00,518 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:48:00,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2019-11-06 18:48:00,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 35. [2019-11-06 18:48:00,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-11-06 18:48:00,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2019-11-06 18:48:00,525 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 25 [2019-11-06 18:48:00,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:00,526 INFO L462 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2019-11-06 18:48:00,526 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:48:00,526 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2019-11-06 18:48:00,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:48:00,527 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:00,527 INFO L410 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:00,737 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:00,738 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:00,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:00,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1290022011, now seen corresponding path program 5 times [2019-11-06 18:48:00,738 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:00,738 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754745115] [2019-11-06 18:48:00,739 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:00,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:00,841 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2019-11-06 18:48:00,841 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754745115] [2019-11-06 18:48:00,841 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330215098] [2019-11-06 18:48:00,842 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 [2019-11-06 18:48:01,021 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2019-11-06 18:48:01,021 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:01,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:48:01,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:01,147 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-11-06 18:48:01,147 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:01,147 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 20 [2019-11-06 18:48:01,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389660632] [2019-11-06 18:48:01,148 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:48:01,148 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:01,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:48:01,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:48:01,149 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand 20 states. [2019-11-06 18:48:01,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:01,332 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2019-11-06 18:48:01,333 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:48:01,333 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 31 [2019-11-06 18:48:01,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:01,334 INFO L225 Difference]: With dead ends: 76 [2019-11-06 18:48:01,334 INFO L226 Difference]: Without dead ends: 59 [2019-11-06 18:48:01,335 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=172, Invalid=208, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:48:01,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2019-11-06 18:48:01,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 41. [2019-11-06 18:48:01,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-11-06 18:48:01,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2019-11-06 18:48:01,343 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 31 [2019-11-06 18:48:01,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:01,344 INFO L462 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2019-11-06 18:48:01,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:48:01,344 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2019-11-06 18:48:01,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:48:01,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:01,345 INFO L410 BasicCegarLoop]: trace histogram [16, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:01,546 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:01,546 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:01,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:01,547 INFO L82 PathProgramCache]: Analyzing trace with hash 678305990, now seen corresponding path program 6 times [2019-11-06 18:48:01,547 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:01,547 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241918472] [2019-11-06 18:48:01,548 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:01,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:01,681 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-06 18:48:01,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241918472] [2019-11-06 18:48:01,681 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840586073] [2019-11-06 18:48:01,681 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 [2019-11-06 18:48:01,899 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:48:01,899 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:01,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:48:01,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:01,920 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-06 18:48:01,920 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:01,920 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:48:01,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030334280] [2019-11-06 18:48:01,921 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:48:01,921 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:01,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:48:01,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:48:01,922 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand 11 states. [2019-11-06 18:48:02,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:02,085 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2019-11-06 18:48:02,085 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:48:02,085 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 37 [2019-11-06 18:48:02,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:02,086 INFO L225 Difference]: With dead ends: 73 [2019-11-06 18:48:02,087 INFO L226 Difference]: Without dead ends: 63 [2019-11-06 18:48:02,087 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:48:02,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2019-11-06 18:48:02,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 42. [2019-11-06 18:48:02,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2019-11-06 18:48:02,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2019-11-06 18:48:02,094 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 37 [2019-11-06 18:48:02,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:02,095 INFO L462 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2019-11-06 18:48:02,095 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:48:02,095 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2019-11-06 18:48:02,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2019-11-06 18:48:02,096 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:02,096 INFO L410 BasicCegarLoop]: trace histogram [16, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:02,300 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:02,301 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:02,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1729755721, now seen corresponding path program 7 times [2019-11-06 18:48:02,302 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:02,302 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338128697] [2019-11-06 18:48:02,302 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:02,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:02,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:02,433 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2019-11-06 18:48:02,436 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338128697] [2019-11-06 18:48:02,436 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529445504] [2019-11-06 18:48:02,436 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 [2019-11-06 18:48:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:02,498 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:48:02,500 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:02,649 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2019-11-06 18:48:02,649 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:02,649 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 26 [2019-11-06 18:48:02,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346589877] [2019-11-06 18:48:02,650 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-06 18:48:02,650 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:02,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-06 18:48:02,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=301, Invalid=349, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:48:02,651 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 26 states. [2019-11-06 18:48:02,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:02,873 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2019-11-06 18:48:02,873 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 18:48:02,873 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 38 [2019-11-06 18:48:02,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:02,875 INFO L225 Difference]: With dead ends: 92 [2019-11-06 18:48:02,875 INFO L226 Difference]: Without dead ends: 73 [2019-11-06 18:48:02,876 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=301, Invalid=349, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:48:02,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-11-06 18:48:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 49. [2019-11-06 18:48:02,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2019-11-06 18:48:02,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2019-11-06 18:48:02,883 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 38 [2019-11-06 18:48:02,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:02,884 INFO L462 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2019-11-06 18:48:02,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-06 18:48:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2019-11-06 18:48:02,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 18:48:02,885 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:02,885 INFO L410 BasicCegarLoop]: trace histogram [22, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:03,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:03,090 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:03,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:03,091 INFO L82 PathProgramCache]: Analyzing trace with hash 937361062, now seen corresponding path program 8 times [2019-11-06 18:48:03,091 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:03,091 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317345678] [2019-11-06 18:48:03,092 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:03,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:03,237 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2019-11-06 18:48:03,237 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317345678] [2019-11-06 18:48:03,237 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719357987] [2019-11-06 18:48:03,237 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 [2019-11-06 18:48:03,305 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:48:03,305 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:03,306 INFO L256 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:48:03,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:03,503 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2019-11-06 18:48:03,504 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:03,504 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 25] total 32 [2019-11-06 18:48:03,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624350774] [2019-11-06 18:48:03,505 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 18:48:03,505 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:03,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 18:48:03,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=526, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:48:03,506 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand 32 states. [2019-11-06 18:48:03,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:03,756 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2019-11-06 18:48:03,756 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 18:48:03,757 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 45 [2019-11-06 18:48:03,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:03,757 INFO L225 Difference]: With dead ends: 103 [2019-11-06 18:48:03,757 INFO L226 Difference]: Without dead ends: 83 [2019-11-06 18:48:03,758 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=466, Invalid=526, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:48:03,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-06 18:48:03,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2019-11-06 18:48:03,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-11-06 18:48:03,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2019-11-06 18:48:03,767 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 45 [2019-11-06 18:48:03,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:03,767 INFO L462 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2019-11-06 18:48:03,767 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 18:48:03,768 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2019-11-06 18:48:03,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-11-06 18:48:03,768 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:03,769 INFO L410 BasicCegarLoop]: trace histogram [28, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:03,977 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:03,977 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:03,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:03,978 INFO L82 PathProgramCache]: Analyzing trace with hash -99026199, now seen corresponding path program 9 times [2019-11-06 18:48:03,978 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:03,978 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003868519] [2019-11-06 18:48:03,978 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:04,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:04,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:04,104 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-06 18:48:04,104 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003868519] [2019-11-06 18:48:04,105 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420622502] [2019-11-06 18:48:04,105 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 [2019-11-06 18:48:04,558 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2019-11-06 18:48:04,558 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:04,559 INFO L256 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:48:04,562 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:04,589 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-06 18:48:04,590 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:04,590 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-06 18:48:04,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453346619] [2019-11-06 18:48:04,591 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:48:04,591 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:04,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:48:04,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:48:04,592 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand 14 states. [2019-11-06 18:48:04,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:04,801 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2019-11-06 18:48:04,801 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:48:04,802 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 52 [2019-11-06 18:48:04,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:04,803 INFO L225 Difference]: With dead ends: 97 [2019-11-06 18:48:04,804 INFO L226 Difference]: Without dead ends: 87 [2019-11-06 18:48:04,804 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:48:04,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2019-11-06 18:48:04,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 57. [2019-11-06 18:48:04,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-11-06 18:48:04,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2019-11-06 18:48:04,813 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 52 [2019-11-06 18:48:04,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:04,813 INFO L462 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2019-11-06 18:48:04,813 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:48:04,814 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2019-11-06 18:48:04,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 18:48:04,814 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:04,815 INFO L410 BasicCegarLoop]: trace histogram [28, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:05,019 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:05,019 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:05,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:05,020 INFO L82 PathProgramCache]: Analyzing trace with hash -892705658, now seen corresponding path program 10 times [2019-11-06 18:48:05,020 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:05,020 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372209045] [2019-11-06 18:48:05,021 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:05,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:05,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:05,171 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2019-11-06 18:48:05,171 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372209045] [2019-11-06 18:48:05,171 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208098493] [2019-11-06 18:48:05,171 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 [2019-11-06 18:48:05,239 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:48:05,239 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:05,240 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 18:48:05,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2019-11-06 18:48:05,480 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:05,480 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 31] total 39 [2019-11-06 18:48:05,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927614601] [2019-11-06 18:48:05,481 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-06 18:48:05,481 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:05,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-06 18:48:05,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=704, Invalid=778, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 18:48:05,482 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand 39 states. [2019-11-06 18:48:05,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:05,809 INFO L93 Difference]: Finished difference Result 120 states and 142 transitions. [2019-11-06 18:48:05,809 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-06 18:48:05,810 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 53 [2019-11-06 18:48:05,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:05,811 INFO L225 Difference]: With dead ends: 120 [2019-11-06 18:48:05,811 INFO L226 Difference]: Without dead ends: 98 [2019-11-06 18:48:05,813 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=704, Invalid=778, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 18:48:05,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2019-11-06 18:48:05,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2019-11-06 18:48:05,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-11-06 18:48:05,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2019-11-06 18:48:05,821 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 53 [2019-11-06 18:48:05,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:05,822 INFO L462 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2019-11-06 18:48:05,822 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-06 18:48:05,822 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2019-11-06 18:48:05,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 18:48:05,823 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:05,823 INFO L410 BasicCegarLoop]: trace histogram [35, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:06,034 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:06,035 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:06,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:06,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1164458139, now seen corresponding path program 11 times [2019-11-06 18:48:06,035 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:06,036 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313101367] [2019-11-06 18:48:06,036 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:06,200 INFO L134 CoverageAnalysis]: Checked inductivity of 696 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-11-06 18:48:06,200 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313101367] [2019-11-06 18:48:06,200 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063116181] [2019-11-06 18:48:06,201 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