/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-industry-pattern/array_assert_loop_dep.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 18:48:29,263 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 18:48:29,266 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 18:48:29,285 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-06 18:48:29,285 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-06 18:48:29,287 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-06 18:48:29,289 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-06 18:48:29,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-06 18:48:29,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-06 18:48:29,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-06 18:48:29,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-06 18:48:29,305 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-06 18:48:29,305 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 18:48:29,306 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 18:48:29,307 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 18:48:29,308 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 18:48:29,309 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 18:48:29,310 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 18:48:29,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 18:48:29,313 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 18:48:29,314 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 18:48:29,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 18:48:29,316 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 18:48:29,317 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 18:48:29,319 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 18:48:29,326 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 18:48:29,327 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 18:48:29,327 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 18:48:29,328 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 18:48:29,341 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 18:48:29,342 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 18:48:29,343 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 18:48:29,343 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 18:48:29,343 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 18:48:29,343 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 18:48:29,344 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 18:48:29,344 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 18:48:29,344 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 18:48:29,344 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 18:48:29,344 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 18:48:29,345 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 18:48:29,345 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 18:48:29,345 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 18:48:29,345 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 18:48:29,345 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 18:48:29,346 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 18:48:29,346 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 18:48:29,346 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 18:48:29,346 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 18:48:29,346 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 18:48:29,347 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 18:48:29,347 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 18:48:29,347 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 18:48:29,347 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 18:48:29,347 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 18:48:29,348 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 18:48:29,348 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 18:48:29,348 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-06 18:48:29,606 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 18:48:29,625 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 18:48:29,629 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 18:48:29,630 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 18:48:29,631 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 18:48:29,632 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2019-11-06 18:48:29,699 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b6a91c3a/6748beee8c1c43caa98e5fcff9b109b4/FLAG8abad2d69 [2019-11-06 18:48:30,131 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 18:48:30,132 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_assert_loop_dep.i [2019-11-06 18:48:30,138 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b6a91c3a/6748beee8c1c43caa98e5fcff9b109b4/FLAG8abad2d69 [2019-11-06 18:48:30,527 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3b6a91c3a/6748beee8c1c43caa98e5fcff9b109b4 [2019-11-06 18:48:30,535 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 18:48:30,536 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 18:48:30,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 18:48:30,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 18:48:30,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 18:48:30,542 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:48:30" (1/1) ... [2019-11-06 18:48:30,545 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@175e7e62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:30, skipping insertion in model container [2019-11-06 18:48:30,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 06:48:30" (1/1) ... [2019-11-06 18:48:30,553 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 18:48:30,569 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 18:48:30,773 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:48:30,784 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 18:48:30,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 18:48:30,828 INFO L192 MainTranslator]: Completed translation [2019-11-06 18:48:30,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:30 WrapperNode [2019-11-06 18:48:30,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 18:48:30,829 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 18:48:30,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 18:48:30,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 18:48:30,914 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:30" (1/1) ... [2019-11-06 18:48:30,915 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:30" (1/1) ... [2019-11-06 18:48:30,922 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:30" (1/1) ... [2019-11-06 18:48:30,922 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:30" (1/1) ... [2019-11-06 18:48:30,936 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:30" (1/1) ... [2019-11-06 18:48:30,944 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:30" (1/1) ... [2019-11-06 18:48:30,949 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:30" (1/1) ... [2019-11-06 18:48:30,951 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 18:48:30,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 18:48:30,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 18:48:30,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 18:48:30,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:30" (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 18:48:31,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 18:48:31,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 18:48:31,007 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-11-06 18:48:31,007 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 18:48:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 18:48:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-11-06 18:48:31,007 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 18:48:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-11-06 18:48:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-06 18:48:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-06 18:48:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-11-06 18:48:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 18:48:31,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 18:48:31,231 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 18:48:31,231 INFO L284 CfgBuilder]: Removed 2 assume(true) statements. [2019-11-06 18:48:31,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:48:31 BoogieIcfgContainer [2019-11-06 18:48:31,234 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 18:48:31,243 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 18:48:31,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 18:48:31,254 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 18:48:31,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 06:48:30" (1/3) ... [2019-11-06 18:48:31,259 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b39ff3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:48:31, skipping insertion in model container [2019-11-06 18:48:31,259 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 06:48:30" (2/3) ... [2019-11-06 18:48:31,260 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b39ff3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 06:48:31, skipping insertion in model container [2019-11-06 18:48:31,260 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 06:48:31" (3/3) ... [2019-11-06 18:48:31,262 INFO L109 eAbstractionObserver]: Analyzing ICFG array_assert_loop_dep.i [2019-11-06 18:48:31,293 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 18:48:31,306 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 18:48:31,326 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 18:48:31,349 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 18:48:31,349 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 18:48:31,350 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 18:48:31,350 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 18:48:31,350 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 18:48:31,350 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 18:48:31,350 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 18:48:31,350 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 18:48:31,367 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2019-11-06 18:48:31,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-06 18:48:31,372 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:31,373 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:31,374 INFO L410 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:31,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:31,379 INFO L82 PathProgramCache]: Analyzing trace with hash -423135907, now seen corresponding path program 1 times [2019-11-06 18:48:31,387 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:31,388 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772945493] [2019-11-06 18:48:31,388 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:31,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:31,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:31,570 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 18:48:31,571 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772945493] [2019-11-06 18:48:31,572 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:48:31,572 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-06 18:48:31,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852559995] [2019-11-06 18:48:31,578 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-06 18:48:31,578 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:31,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-06 18:48:31,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-06 18:48:31,595 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2019-11-06 18:48:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:31,682 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2019-11-06 18:48:31,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 18:48:31,684 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-11-06 18:48:31,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:31,692 INFO L225 Difference]: With dead ends: 42 [2019-11-06 18:48:31,692 INFO L226 Difference]: Without dead ends: 20 [2019-11-06 18:48:31,696 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 18:48:31,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2019-11-06 18:48:31,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2019-11-06 18:48:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-11-06 18:48:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2019-11-06 18:48:31,736 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 13 [2019-11-06 18:48:31,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:31,737 INFO L462 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2019-11-06 18:48:31,737 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-06 18:48:31,737 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2019-11-06 18:48:31,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-11-06 18:48:31,738 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:31,738 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:31,739 INFO L410 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:31,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:31,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1453190697, now seen corresponding path program 1 times [2019-11-06 18:48:31,740 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:31,740 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527265987] [2019-11-06 18:48:31,740 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:31,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:31,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:31,803 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 18:48:31,804 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527265987] [2019-11-06 18:48:31,804 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 18:48:31,805 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 18:48:31,805 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819610303] [2019-11-06 18:48:31,807 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 18:48:31,807 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:31,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 18:48:31,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-06 18:48:31,808 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 4 states. [2019-11-06 18:48:31,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:31,886 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2019-11-06 18:48:31,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 18:48:31,887 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2019-11-06 18:48:31,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:31,890 INFO L225 Difference]: With dead ends: 39 [2019-11-06 18:48:31,890 INFO L226 Difference]: Without dead ends: 27 [2019-11-06 18:48:31,891 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 18:48:31,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2019-11-06 18:48:31,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2019-11-06 18:48:31,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-06 18:48:31,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2019-11-06 18:48:31,902 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 13 [2019-11-06 18:48:31,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:31,902 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2019-11-06 18:48:31,902 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 18:48:31,902 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2019-11-06 18:48:31,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2019-11-06 18:48:31,904 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:31,904 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:31,904 INFO L410 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:31,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:31,905 INFO L82 PathProgramCache]: Analyzing trace with hash -769700427, now seen corresponding path program 1 times [2019-11-06 18:48:31,905 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:31,905 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785459539] [2019-11-06 18:48:31,906 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:31,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:32,008 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785459539] [2019-11-06 18:48:32,008 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305207489] [2019-11-06 18:48:32,009 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 18:48:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:32,069 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-06 18:48:32,075 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:32,104 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:32,104 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2019-11-06 18:48:32,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364873805] [2019-11-06 18:48:32,105 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 18:48:32,105 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:32,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 18:48:32,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:48:32,106 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2019-11-06 18:48:32,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:32,241 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2019-11-06 18:48:32,242 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-06 18:48:32,242 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2019-11-06 18:48:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:32,243 INFO L225 Difference]: With dead ends: 50 [2019-11-06 18:48:32,243 INFO L226 Difference]: Without dead ends: 34 [2019-11-06 18:48:32,244 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 18:48:32,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-11-06 18:48:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-11-06 18:48:32,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-11-06 18:48:32,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2019-11-06 18:48:32,260 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 15 [2019-11-06 18:48:32,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:32,261 INFO L462 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2019-11-06 18:48:32,261 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 18:48:32,261 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2019-11-06 18:48:32,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-06 18:48:32,262 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:32,262 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:32,466 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:32,467 INFO L410 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:32,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:32,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1065547245, now seen corresponding path program 2 times [2019-11-06 18:48:32,468 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:32,468 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861024319] [2019-11-06 18:48:32,468 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:32,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:32,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:32,551 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861024319] [2019-11-06 18:48:32,551 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926396428] [2019-11-06 18:48:32,551 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 18:48:32,594 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:48:32,595 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:32,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2019-11-06 18:48:32,597 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:32,636 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:32,636 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2019-11-06 18:48:32,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65518140] [2019-11-06 18:48:32,637 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 18:48:32,637 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:32,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 18:48:32,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:48:32,638 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 7 states. [2019-11-06 18:48:32,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:32,749 INFO L93 Difference]: Finished difference Result 62 states and 72 transitions. [2019-11-06 18:48:32,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-11-06 18:48:32,749 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 17 [2019-11-06 18:48:32,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:32,750 INFO L225 Difference]: With dead ends: 62 [2019-11-06 18:48:32,751 INFO L226 Difference]: Without dead ends: 41 [2019-11-06 18:48:32,751 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2019-11-06 18:48:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2019-11-06 18:48:32,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2019-11-06 18:48:32,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-11-06 18:48:32,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2019-11-06 18:48:32,760 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 17 [2019-11-06 18:48:32,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:32,761 INFO L462 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2019-11-06 18:48:32,761 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 18:48:32,761 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2019-11-06 18:48:32,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-11-06 18:48:32,762 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:32,762 INFO L410 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:32,965 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:32,965 INFO L410 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:32,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:32,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1906497807, now seen corresponding path program 3 times [2019-11-06 18:48:32,966 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:32,966 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056501709] [2019-11-06 18:48:32,966 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:33,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:33,086 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:33,090 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056501709] [2019-11-06 18:48:33,090 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504357268] [2019-11-06 18:48:33,090 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 18:48:33,145 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-11-06 18:48:33,145 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:33,146 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-06 18:48:33,150 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:33,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:33,162 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:33,162 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2019-11-06 18:48:33,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156538780] [2019-11-06 18:48:33,163 INFO L442 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-11-06 18:48:33,164 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:33,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-11-06 18:48:33,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2019-11-06 18:48:33,164 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 8 states. [2019-11-06 18:48:33,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:33,319 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2019-11-06 18:48:33,320 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 18:48:33,320 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 19 [2019-11-06 18:48:33,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:33,321 INFO L225 Difference]: With dead ends: 74 [2019-11-06 18:48:33,321 INFO L226 Difference]: Without dead ends: 48 [2019-11-06 18:48:33,324 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 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 18:48:33,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2019-11-06 18:48:33,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2019-11-06 18:48:33,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2019-11-06 18:48:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2019-11-06 18:48:33,343 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 19 [2019-11-06 18:48:33,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:33,344 INFO L462 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2019-11-06 18:48:33,344 INFO L463 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-11-06 18:48:33,344 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2019-11-06 18:48:33,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2019-11-06 18:48:33,345 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:33,345 INFO L410 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:33,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:33,559 INFO L410 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:33,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:33,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1688831055, now seen corresponding path program 4 times [2019-11-06 18:48:33,559 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:33,560 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300690500] [2019-11-06 18:48:33,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:33,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:33,683 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:33,683 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300690500] [2019-11-06 18:48:33,684 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571125026] [2019-11-06 18:48:33,684 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 18:48:33,725 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:48:33,726 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:33,727 INFO L256 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-06 18:48:33,728 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:33,741 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:33,741 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2019-11-06 18:48:33,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056302231] [2019-11-06 18:48:33,742 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-06 18:48:33,742 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:33,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-06 18:48:33,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:48:33,743 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 9 states. [2019-11-06 18:48:33,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:33,895 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2019-11-06 18:48:33,896 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-11-06 18:48:33,896 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2019-11-06 18:48:33,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:33,897 INFO L225 Difference]: With dead ends: 86 [2019-11-06 18:48:33,897 INFO L226 Difference]: Without dead ends: 55 [2019-11-06 18:48:33,898 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2019-11-06 18:48:33,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-06 18:48:33,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2019-11-06 18:48:33,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-11-06 18:48:33,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2019-11-06 18:48:33,907 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 21 [2019-11-06 18:48:33,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:33,908 INFO L462 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2019-11-06 18:48:33,908 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-06 18:48:33,908 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2019-11-06 18:48:33,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2019-11-06 18:48:33,909 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:33,909 INFO L410 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:34,112 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:34,113 INFO L410 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:34,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:34,114 INFO L82 PathProgramCache]: Analyzing trace with hash -648805843, now seen corresponding path program 5 times [2019-11-06 18:48:34,114 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:34,115 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536493239] [2019-11-06 18:48:34,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:34,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:34,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:34,199 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536493239] [2019-11-06 18:48:34,199 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727837258] [2019-11-06 18:48:34,199 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 18:48:34,244 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-11-06 18:48:34,244 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:34,245 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2019-11-06 18:48:34,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:34,265 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:34,265 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:34,266 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2019-11-06 18:48:34,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254741001] [2019-11-06 18:48:34,266 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-11-06 18:48:34,267 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:34,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-11-06 18:48:34,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:48:34,267 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand 10 states. [2019-11-06 18:48:34,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:34,444 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2019-11-06 18:48:34,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-11-06 18:48:34,445 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 23 [2019-11-06 18:48:34,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:34,446 INFO L225 Difference]: With dead ends: 98 [2019-11-06 18:48:34,446 INFO L226 Difference]: Without dead ends: 62 [2019-11-06 18:48:34,447 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2019-11-06 18:48:34,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2019-11-06 18:48:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2019-11-06 18:48:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-11-06 18:48:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2019-11-06 18:48:34,464 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 23 [2019-11-06 18:48:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:34,465 INFO L462 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2019-11-06 18:48:34,465 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-11-06 18:48:34,465 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2019-11-06 18:48:34,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2019-11-06 18:48:34,466 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:34,466 INFO L410 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:34,669 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:34,670 INFO L410 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:34,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:34,670 INFO L82 PathProgramCache]: Analyzing trace with hash -849969013, now seen corresponding path program 6 times [2019-11-06 18:48:34,671 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:34,671 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050601662] [2019-11-06 18:48:34,671 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:34,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:34,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:34,784 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:34,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050601662] [2019-11-06 18:48:34,785 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193753467] [2019-11-06 18:48:34,785 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 18:48:34,839 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-11-06 18:48:34,839 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:34,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2019-11-06 18:48:34,842 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:34,857 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:34,857 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2019-11-06 18:48:34,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542902669] [2019-11-06 18:48:34,858 INFO L442 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-11-06 18:48:34,858 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:34,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-11-06 18:48:34,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2019-11-06 18:48:34,858 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand 11 states. [2019-11-06 18:48:35,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:35,076 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2019-11-06 18:48:35,077 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 18:48:35,077 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 25 [2019-11-06 18:48:35,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:35,078 INFO L225 Difference]: With dead ends: 110 [2019-11-06 18:48:35,078 INFO L226 Difference]: Without dead ends: 69 [2019-11-06 18:48:35,080 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 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 18:48:35,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-11-06 18:48:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-11-06 18:48:35,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-11-06 18:48:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2019-11-06 18:48:35,088 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 25 [2019-11-06 18:48:35,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:35,088 INFO L462 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2019-11-06 18:48:35,088 INFO L463 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-11-06 18:48:35,089 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2019-11-06 18:48:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2019-11-06 18:48:35,089 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:35,089 INFO L410 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:35,297 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:35,298 INFO L410 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:35,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:35,298 INFO L82 PathProgramCache]: Analyzing trace with hash -894247063, now seen corresponding path program 7 times [2019-11-06 18:48:35,299 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:35,299 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086528430] [2019-11-06 18:48:35,300 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:35,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:35,386 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:35,386 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086528430] [2019-11-06 18:48:35,386 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486612325] [2019-11-06 18:48:35,387 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 18:48:35,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:35,425 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2019-11-06 18:48:35,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:35,456 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:35,457 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:35,457 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2019-11-06 18:48:35,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493990658] [2019-11-06 18:48:35,458 INFO L442 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-11-06 18:48:35,458 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:35,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-11-06 18:48:35,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:48:35,459 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 12 states. [2019-11-06 18:48:35,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:35,607 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2019-11-06 18:48:35,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-06 18:48:35,607 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 27 [2019-11-06 18:48:35,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:35,609 INFO L225 Difference]: With dead ends: 122 [2019-11-06 18:48:35,609 INFO L226 Difference]: Without dead ends: 76 [2019-11-06 18:48:35,610 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2019-11-06 18:48:35,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-11-06 18:48:35,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2019-11-06 18:48:35,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-11-06 18:48:35,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 84 transitions. [2019-11-06 18:48:35,619 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 84 transitions. Word has length 27 [2019-11-06 18:48:35,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:35,619 INFO L462 AbstractCegarLoop]: Abstraction has 74 states and 84 transitions. [2019-11-06 18:48:35,619 INFO L463 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-11-06 18:48:35,620 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 84 transitions. [2019-11-06 18:48:35,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2019-11-06 18:48:35,620 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:35,621 INFO L410 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:35,832 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:35,833 INFO L410 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:35,833 INFO L82 PathProgramCache]: Analyzing trace with hash -495780153, now seen corresponding path program 8 times [2019-11-06 18:48:35,833 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:35,834 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785490649] [2019-11-06 18:48:35,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:35,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:35,929 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785490649] [2019-11-06 18:48:35,929 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646554074] [2019-11-06 18:48:35,929 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 18:48:35,968 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:48:35,968 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:35,969 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjunts are in the unsatisfiable core [2019-11-06 18:48:35,974 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:35,986 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:35,987 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2019-11-06 18:48:35,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551645913] [2019-11-06 18:48:35,987 INFO L442 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-11-06 18:48:35,987 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:35,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-11-06 18:48:35,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:48:35,988 INFO L87 Difference]: Start difference. First operand 74 states and 84 transitions. Second operand 13 states. [2019-11-06 18:48:36,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:36,180 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2019-11-06 18:48:36,180 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-11-06 18:48:36,180 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2019-11-06 18:48:36,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:36,181 INFO L225 Difference]: With dead ends: 134 [2019-11-06 18:48:36,181 INFO L226 Difference]: Without dead ends: 83 [2019-11-06 18:48:36,182 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2019-11-06 18:48:36,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2019-11-06 18:48:36,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2019-11-06 18:48:36,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-11-06 18:48:36,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 92 transitions. [2019-11-06 18:48:36,192 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 92 transitions. Word has length 29 [2019-11-06 18:48:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:36,192 INFO L462 AbstractCegarLoop]: Abstraction has 81 states and 92 transitions. [2019-11-06 18:48:36,192 INFO L463 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-11-06 18:48:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 92 transitions. [2019-11-06 18:48:36,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-11-06 18:48:36,193 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:36,193 INFO L410 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:36,404 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:36,405 INFO L410 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:36,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:36,406 INFO L82 PathProgramCache]: Analyzing trace with hash 178831013, now seen corresponding path program 9 times [2019-11-06 18:48:36,406 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:36,406 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760895916] [2019-11-06 18:48:36,406 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:36,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:36,531 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:36,532 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760895916] [2019-11-06 18:48:36,532 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517027975] [2019-11-06 18:48:36,532 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 18:48:36,601 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-11-06 18:48:36,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:36,602 INFO L256 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2019-11-06 18:48:36,604 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:36,625 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:36,626 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:36,626 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2019-11-06 18:48:36,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987347632] [2019-11-06 18:48:36,627 INFO L442 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-11-06 18:48:36,627 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:36,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-11-06 18:48:36,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:48:36,628 INFO L87 Difference]: Start difference. First operand 81 states and 92 transitions. Second operand 14 states. [2019-11-06 18:48:36,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:36,870 INFO L93 Difference]: Finished difference Result 146 states and 170 transitions. [2019-11-06 18:48:36,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-11-06 18:48:36,870 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 31 [2019-11-06 18:48:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:36,871 INFO L225 Difference]: With dead ends: 146 [2019-11-06 18:48:36,872 INFO L226 Difference]: Without dead ends: 90 [2019-11-06 18:48:36,872 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2019-11-06 18:48:36,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2019-11-06 18:48:36,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2019-11-06 18:48:36,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2019-11-06 18:48:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2019-11-06 18:48:36,885 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 31 [2019-11-06 18:48:36,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:36,885 INFO L462 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2019-11-06 18:48:36,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-11-06 18:48:36,885 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2019-11-06 18:48:36,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2019-11-06 18:48:36,886 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:36,887 INFO L410 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:37,090 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:37,091 INFO L410 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:37,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:37,092 INFO L82 PathProgramCache]: Analyzing trace with hash -59900157, now seen corresponding path program 10 times [2019-11-06 18:48:37,092 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:37,092 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547790016] [2019-11-06 18:48:37,093 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:37,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:37,217 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:37,218 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547790016] [2019-11-06 18:48:37,218 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3917163] [2019-11-06 18:48:37,218 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 18:48:37,269 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:48:37,270 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:37,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2019-11-06 18:48:37,272 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:37,296 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:37,297 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2019-11-06 18:48:37,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389468735] [2019-11-06 18:48:37,297 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-11-06 18:48:37,298 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:37,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-11-06 18:48:37,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:48:37,298 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 15 states. [2019-11-06 18:48:37,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:37,526 INFO L93 Difference]: Finished difference Result 158 states and 184 transitions. [2019-11-06 18:48:37,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-06 18:48:37,526 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 33 [2019-11-06 18:48:37,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:37,527 INFO L225 Difference]: With dead ends: 158 [2019-11-06 18:48:37,527 INFO L226 Difference]: Without dead ends: 97 [2019-11-06 18:48:37,528 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2019-11-06 18:48:37,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-11-06 18:48:37,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-11-06 18:48:37,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-11-06 18:48:37,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 108 transitions. [2019-11-06 18:48:37,536 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 108 transitions. Word has length 33 [2019-11-06 18:48:37,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:37,536 INFO L462 AbstractCegarLoop]: Abstraction has 95 states and 108 transitions. [2019-11-06 18:48:37,536 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-11-06 18:48:37,536 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 108 transitions. [2019-11-06 18:48:37,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2019-11-06 18:48:37,537 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:37,538 INFO L410 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:37,742 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:37,743 INFO L410 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:37,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:37,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1847287839, now seen corresponding path program 11 times [2019-11-06 18:48:37,744 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:37,744 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632616727] [2019-11-06 18:48:37,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:37,927 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:37,928 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632616727] [2019-11-06 18:48:37,928 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077608177] [2019-11-06 18:48:37,928 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 [2019-11-06 18:48:38,023 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-11-06 18:48:38,023 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:38,024 INFO L256 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 18:48:38,026 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:38,052 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:38,053 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2019-11-06 18:48:38,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103624330] [2019-11-06 18:48:38,053 INFO L442 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-11-06 18:48:38,053 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:38,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-11-06 18:48:38,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:48:38,054 INFO L87 Difference]: Start difference. First operand 95 states and 108 transitions. Second operand 16 states. [2019-11-06 18:48:38,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:38,326 INFO L93 Difference]: Finished difference Result 170 states and 198 transitions. [2019-11-06 18:48:38,327 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-11-06 18:48:38,327 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 35 [2019-11-06 18:48:38,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:38,328 INFO L225 Difference]: With dead ends: 170 [2019-11-06 18:48:38,329 INFO L226 Difference]: Without dead ends: 104 [2019-11-06 18:48:38,330 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2019-11-06 18:48:38,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2019-11-06 18:48:38,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2019-11-06 18:48:38,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-11-06 18:48:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 116 transitions. [2019-11-06 18:48:38,338 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 116 transitions. Word has length 35 [2019-11-06 18:48:38,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:38,339 INFO L462 AbstractCegarLoop]: Abstraction has 102 states and 116 transitions. [2019-11-06 18:48:38,339 INFO L463 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-11-06 18:48:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 116 transitions. [2019-11-06 18:48:38,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-11-06 18:48:38,340 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:38,340 INFO L410 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:38,543 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:38,544 INFO L410 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:38,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:38,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1539931841, now seen corresponding path program 12 times [2019-11-06 18:48:38,545 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:38,545 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926522238] [2019-11-06 18:48:38,545 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:38,743 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:38,743 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926522238] [2019-11-06 18:48:38,744 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008729695] [2019-11-06 18:48:38,744 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 [2019-11-06 18:48:38,911 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-11-06 18:48:38,911 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:38,912 INFO L256 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-06 18:48:38,914 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:38,951 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:38,952 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:38,952 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2019-11-06 18:48:38,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199934701] [2019-11-06 18:48:38,954 INFO L442 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-11-06 18:48:38,954 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:38,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-11-06 18:48:38,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:48:38,955 INFO L87 Difference]: Start difference. First operand 102 states and 116 transitions. Second operand 17 states. [2019-11-06 18:48:39,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:39,250 INFO L93 Difference]: Finished difference Result 182 states and 212 transitions. [2019-11-06 18:48:39,250 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-11-06 18:48:39,250 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 37 [2019-11-06 18:48:39,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:39,251 INFO L225 Difference]: With dead ends: 182 [2019-11-06 18:48:39,252 INFO L226 Difference]: Without dead ends: 111 [2019-11-06 18:48:39,252 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2019-11-06 18:48:39,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-11-06 18:48:39,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2019-11-06 18:48:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-11-06 18:48:39,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 124 transitions. [2019-11-06 18:48:39,260 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 124 transitions. Word has length 37 [2019-11-06 18:48:39,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:39,260 INFO L462 AbstractCegarLoop]: Abstraction has 109 states and 124 transitions. [2019-11-06 18:48:39,260 INFO L463 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-11-06 18:48:39,260 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 124 transitions. [2019-11-06 18:48:39,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-11-06 18:48:39,261 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:39,261 INFO L410 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:39,465 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:39,465 INFO L410 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:39,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:39,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1771406109, now seen corresponding path program 13 times [2019-11-06 18:48:39,466 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:39,467 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17514746] [2019-11-06 18:48:39,467 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:39,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:39,635 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:39,635 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17514746] [2019-11-06 18:48:39,636 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929707412] [2019-11-06 18:48:39,636 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 [2019-11-06 18:48:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:39,685 INFO L256 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2019-11-06 18:48:39,690 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:39,709 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:39,709 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:39,710 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 18 [2019-11-06 18:48:39,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710823636] [2019-11-06 18:48:39,710 INFO L442 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-11-06 18:48:39,710 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:39,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-11-06 18:48:39,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:48:39,711 INFO L87 Difference]: Start difference. First operand 109 states and 124 transitions. Second operand 18 states. [2019-11-06 18:48:40,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:40,035 INFO L93 Difference]: Finished difference Result 194 states and 226 transitions. [2019-11-06 18:48:40,035 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-11-06 18:48:40,035 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2019-11-06 18:48:40,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:40,036 INFO L225 Difference]: With dead ends: 194 [2019-11-06 18:48:40,036 INFO L226 Difference]: Without dead ends: 118 [2019-11-06 18:48:40,037 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2019-11-06 18:48:40,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-11-06 18:48:40,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 116. [2019-11-06 18:48:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2019-11-06 18:48:40,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 132 transitions. [2019-11-06 18:48:40,044 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 132 transitions. Word has length 39 [2019-11-06 18:48:40,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:40,045 INFO L462 AbstractCegarLoop]: Abstraction has 116 states and 132 transitions. [2019-11-06 18:48:40,045 INFO L463 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-11-06 18:48:40,045 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 132 transitions. [2019-11-06 18:48:40,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2019-11-06 18:48:40,046 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:40,046 INFO L410 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:40,250 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:40,250 INFO L410 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:40,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:40,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1396409723, now seen corresponding path program 14 times [2019-11-06 18:48:40,251 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:40,252 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046086514] [2019-11-06 18:48:40,252 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:40,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:40,462 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:40,463 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046086514] [2019-11-06 18:48:40,463 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779427894] [2019-11-06 18:48:40,463 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:40,506 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:48:40,506 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:40,507 INFO L256 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2019-11-06 18:48:40,508 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:40,526 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:40,526 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 19 [2019-11-06 18:48:40,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458901973] [2019-11-06 18:48:40,526 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-06 18:48:40,527 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:40,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-06 18:48:40,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:48:40,527 INFO L87 Difference]: Start difference. First operand 116 states and 132 transitions. Second operand 19 states. [2019-11-06 18:48:40,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:40,860 INFO L93 Difference]: Finished difference Result 206 states and 240 transitions. [2019-11-06 18:48:40,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-11-06 18:48:40,860 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 41 [2019-11-06 18:48:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:40,862 INFO L225 Difference]: With dead ends: 206 [2019-11-06 18:48:40,862 INFO L226 Difference]: Without dead ends: 125 [2019-11-06 18:48:40,864 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2019-11-06 18:48:40,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2019-11-06 18:48:40,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2019-11-06 18:48:40,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2019-11-06 18:48:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 140 transitions. [2019-11-06 18:48:40,872 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 140 transitions. Word has length 41 [2019-11-06 18:48:40,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:40,872 INFO L462 AbstractCegarLoop]: Abstraction has 123 states and 140 transitions. [2019-11-06 18:48:40,872 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-06 18:48:40,872 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 140 transitions. [2019-11-06 18:48:40,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-11-06 18:48:40,873 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:40,873 INFO L410 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:41,076 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:41,077 INFO L410 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:41,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1802135641, now seen corresponding path program 15 times [2019-11-06 18:48:41,078 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:41,078 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117005750] [2019-11-06 18:48:41,078 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:41,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:41,263 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:41,264 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117005750] [2019-11-06 18:48:41,264 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292966166] [2019-11-06 18:48:41,264 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:41,338 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-11-06 18:48:41,339 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:41,340 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 17 conjunts are in the unsatisfiable core [2019-11-06 18:48:41,341 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:41,368 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:41,368 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:41,368 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 20 [2019-11-06 18:48:41,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515084367] [2019-11-06 18:48:41,369 INFO L442 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-11-06 18:48:41,369 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:41,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-11-06 18:48:41,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:48:41,370 INFO L87 Difference]: Start difference. First operand 123 states and 140 transitions. Second operand 20 states. [2019-11-06 18:48:41,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:41,726 INFO L93 Difference]: Finished difference Result 218 states and 254 transitions. [2019-11-06 18:48:41,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-11-06 18:48:41,726 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 43 [2019-11-06 18:48:41,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:41,728 INFO L225 Difference]: With dead ends: 218 [2019-11-06 18:48:41,728 INFO L226 Difference]: Without dead ends: 132 [2019-11-06 18:48:41,729 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2019-11-06 18:48:41,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-11-06 18:48:41,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 130. [2019-11-06 18:48:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2019-11-06 18:48:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 148 transitions. [2019-11-06 18:48:41,738 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 148 transitions. Word has length 43 [2019-11-06 18:48:41,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:41,738 INFO L462 AbstractCegarLoop]: Abstraction has 130 states and 148 transitions. [2019-11-06 18:48:41,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-11-06 18:48:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 148 transitions. [2019-11-06 18:48:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2019-11-06 18:48:41,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:41,739 INFO L410 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:41,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:41,943 INFO L410 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:41,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:41,943 INFO L82 PathProgramCache]: Analyzing trace with hash 862718903, now seen corresponding path program 16 times [2019-11-06 18:48:41,943 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:41,944 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95620398] [2019-11-06 18:48:41,944 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:42,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:42,160 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95620398] [2019-11-06 18:48:42,160 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062071003] [2019-11-06 18:48:42,160 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:42,200 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:48:42,200 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:42,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2019-11-06 18:48:42,202 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:42,220 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:42,221 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:42,221 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 21 [2019-11-06 18:48:42,221 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79029990] [2019-11-06 18:48:42,222 INFO L442 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-11-06 18:48:42,222 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:42,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-11-06 18:48:42,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:48:42,223 INFO L87 Difference]: Start difference. First operand 130 states and 148 transitions. Second operand 21 states. [2019-11-06 18:48:42,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:42,579 INFO L93 Difference]: Finished difference Result 230 states and 268 transitions. [2019-11-06 18:48:42,579 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-11-06 18:48:42,579 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 45 [2019-11-06 18:48:42,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:42,581 INFO L225 Difference]: With dead ends: 230 [2019-11-06 18:48:42,581 INFO L226 Difference]: Without dead ends: 139 [2019-11-06 18:48:42,582 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2019-11-06 18:48:42,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2019-11-06 18:48:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2019-11-06 18:48:42,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2019-11-06 18:48:42,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 156 transitions. [2019-11-06 18:48:42,589 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 156 transitions. Word has length 45 [2019-11-06 18:48:42,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:42,590 INFO L462 AbstractCegarLoop]: Abstraction has 137 states and 156 transitions. [2019-11-06 18:48:42,590 INFO L463 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-11-06 18:48:42,590 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 156 transitions. [2019-11-06 18:48:42,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2019-11-06 18:48:42,590 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:42,591 INFO L410 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:42,792 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:42,792 INFO L410 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:42,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:42,793 INFO L82 PathProgramCache]: Analyzing trace with hash 26365845, now seen corresponding path program 17 times [2019-11-06 18:48:42,793 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:42,794 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332310474] [2019-11-06 18:48:42,794 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:43,020 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332310474] [2019-11-06 18:48:43,020 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949496110] [2019-11-06 18:48:43,020 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:43,165 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-11-06 18:48:43,165 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:43,166 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 19 conjunts are in the unsatisfiable core [2019-11-06 18:48:43,167 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:43,187 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:43,187 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 22 [2019-11-06 18:48:43,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865492150] [2019-11-06 18:48:43,188 INFO L442 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-11-06 18:48:43,188 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:43,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-11-06 18:48:43,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:48:43,189 INFO L87 Difference]: Start difference. First operand 137 states and 156 transitions. Second operand 22 states. [2019-11-06 18:48:43,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:43,618 INFO L93 Difference]: Finished difference Result 242 states and 282 transitions. [2019-11-06 18:48:43,618 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-11-06 18:48:43,618 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 47 [2019-11-06 18:48:43,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:43,620 INFO L225 Difference]: With dead ends: 242 [2019-11-06 18:48:43,620 INFO L226 Difference]: Without dead ends: 146 [2019-11-06 18:48:43,621 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2019-11-06 18:48:43,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2019-11-06 18:48:43,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 144. [2019-11-06 18:48:43,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2019-11-06 18:48:43,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 164 transitions. [2019-11-06 18:48:43,628 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 164 transitions. Word has length 47 [2019-11-06 18:48:43,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:43,628 INFO L462 AbstractCegarLoop]: Abstraction has 144 states and 164 transitions. [2019-11-06 18:48:43,628 INFO L463 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-11-06 18:48:43,629 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 164 transitions. [2019-11-06 18:48:43,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-11-06 18:48:43,629 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:43,629 INFO L410 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:43,833 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:43,834 INFO L410 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:43,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:43,834 INFO L82 PathProgramCache]: Analyzing trace with hash -550038541, now seen corresponding path program 18 times [2019-11-06 18:48:43,834 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:43,834 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847000054] [2019-11-06 18:48:43,834 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:43,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:44,043 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847000054] [2019-11-06 18:48:44,043 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354457599] [2019-11-06 18:48:44,043 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:44,357 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-11-06 18:48:44,358 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:44,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 20 conjunts are in the unsatisfiable core [2019-11-06 18:48:44,360 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:44,376 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:44,376 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 23 [2019-11-06 18:48:44,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562667397] [2019-11-06 18:48:44,377 INFO L442 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-11-06 18:48:44,377 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:44,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-11-06 18:48:44,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-11-06 18:48:44,378 INFO L87 Difference]: Start difference. First operand 144 states and 164 transitions. Second operand 23 states. [2019-11-06 18:48:44,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:44,771 INFO L93 Difference]: Finished difference Result 254 states and 296 transitions. [2019-11-06 18:48:44,771 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-11-06 18:48:44,771 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2019-11-06 18:48:44,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:44,773 INFO L225 Difference]: With dead ends: 254 [2019-11-06 18:48:44,773 INFO L226 Difference]: Without dead ends: 153 [2019-11-06 18:48:44,774 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2019-11-06 18:48:44,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-11-06 18:48:44,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2019-11-06 18:48:44,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-11-06 18:48:44,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 172 transitions. [2019-11-06 18:48:44,782 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 172 transitions. Word has length 49 [2019-11-06 18:48:44,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:44,782 INFO L462 AbstractCegarLoop]: Abstraction has 151 states and 172 transitions. [2019-11-06 18:48:44,782 INFO L463 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-11-06 18:48:44,782 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 172 transitions. [2019-11-06 18:48:44,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-11-06 18:48:44,783 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:44,783 INFO L410 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:44,987 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:44,987 INFO L410 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:44,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:44,987 INFO L82 PathProgramCache]: Analyzing trace with hash -423872303, now seen corresponding path program 19 times [2019-11-06 18:48:44,987 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:44,987 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209402646] [2019-11-06 18:48:44,988 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:45,303 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209402646] [2019-11-06 18:48:45,303 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356788728] [2019-11-06 18:48:45,304 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:45,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:45,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 21 conjunts are in the unsatisfiable core [2019-11-06 18:48:45,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:45,423 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:45,424 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:45,424 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 24 [2019-11-06 18:48:45,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806092664] [2019-11-06 18:48:45,425 INFO L442 AbstractCegarLoop]: Interpolant automaton has 24 states [2019-11-06 18:48:45,425 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:45,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2019-11-06 18:48:45,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:48:45,426 INFO L87 Difference]: Start difference. First operand 151 states and 172 transitions. Second operand 24 states. [2019-11-06 18:48:45,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:45,767 INFO L93 Difference]: Finished difference Result 266 states and 310 transitions. [2019-11-06 18:48:45,773 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-11-06 18:48:45,773 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2019-11-06 18:48:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:45,774 INFO L225 Difference]: With dead ends: 266 [2019-11-06 18:48:45,774 INFO L226 Difference]: Without dead ends: 160 [2019-11-06 18:48:45,775 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2019-11-06 18:48:45,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2019-11-06 18:48:45,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 158. [2019-11-06 18:48:45,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2019-11-06 18:48:45,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 180 transitions. [2019-11-06 18:48:45,784 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 180 transitions. Word has length 51 [2019-11-06 18:48:45,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:45,784 INFO L462 AbstractCegarLoop]: Abstraction has 158 states and 180 transitions. [2019-11-06 18:48:45,784 INFO L463 AbstractCegarLoop]: Interpolant automaton has 24 states. [2019-11-06 18:48:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 180 transitions. [2019-11-06 18:48:45,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-11-06 18:48:45,785 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:45,785 INFO L410 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:45,989 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:45,989 INFO L410 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:45,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:45,990 INFO L82 PathProgramCache]: Analyzing trace with hash 562798127, now seen corresponding path program 20 times [2019-11-06 18:48:45,990 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:45,990 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532379025] [2019-11-06 18:48:45,991 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:46,228 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:46,229 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532379025] [2019-11-06 18:48:46,229 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498731654] [2019-11-06 18:48:46,229 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:46,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:48:46,277 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:46,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 22 conjunts are in the unsatisfiable core [2019-11-06 18:48:46,279 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:46,312 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:46,312 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:46,312 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 25 [2019-11-06 18:48:46,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103407976] [2019-11-06 18:48:46,313 INFO L442 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-11-06 18:48:46,313 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:46,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-11-06 18:48:46,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:48:46,314 INFO L87 Difference]: Start difference. First operand 158 states and 180 transitions. Second operand 25 states. [2019-11-06 18:48:46,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:46,851 INFO L93 Difference]: Finished difference Result 278 states and 324 transitions. [2019-11-06 18:48:46,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-11-06 18:48:46,853 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 53 [2019-11-06 18:48:46,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:46,855 INFO L225 Difference]: With dead ends: 278 [2019-11-06 18:48:46,855 INFO L226 Difference]: Without dead ends: 167 [2019-11-06 18:48:46,856 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2019-11-06 18:48:46,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-11-06 18:48:46,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2019-11-06 18:48:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-11-06 18:48:46,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 188 transitions. [2019-11-06 18:48:46,863 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 188 transitions. Word has length 53 [2019-11-06 18:48:46,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:46,863 INFO L462 AbstractCegarLoop]: Abstraction has 165 states and 188 transitions. [2019-11-06 18:48:46,864 INFO L463 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-11-06 18:48:46,864 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 188 transitions. [2019-11-06 18:48:46,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-11-06 18:48:46,864 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:46,864 INFO L410 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:47,068 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:47,069 INFO L410 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:47,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:47,069 INFO L82 PathProgramCache]: Analyzing trace with hash -434691059, now seen corresponding path program 21 times [2019-11-06 18:48:47,069 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:47,069 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917790238] [2019-11-06 18:48:47,069 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:47,340 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:47,340 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917790238] [2019-11-06 18:48:47,340 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580304859] [2019-11-06 18:48:47,340 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:47,553 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-11-06 18:48:47,554 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:47,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2019-11-06 18:48:47,556 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:47,570 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:47,571 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 26 [2019-11-06 18:48:47,571 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684495332] [2019-11-06 18:48:47,571 INFO L442 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-11-06 18:48:47,572 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:47,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-11-06 18:48:47,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:48:47,572 INFO L87 Difference]: Start difference. First operand 165 states and 188 transitions. Second operand 26 states. [2019-11-06 18:48:47,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:47,972 INFO L93 Difference]: Finished difference Result 290 states and 338 transitions. [2019-11-06 18:48:47,972 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2019-11-06 18:48:47,973 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 55 [2019-11-06 18:48:47,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:47,974 INFO L225 Difference]: With dead ends: 290 [2019-11-06 18:48:47,974 INFO L226 Difference]: Without dead ends: 174 [2019-11-06 18:48:47,975 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2019-11-06 18:48:47,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2019-11-06 18:48:47,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2019-11-06 18:48:47,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2019-11-06 18:48:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 196 transitions. [2019-11-06 18:48:47,988 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 196 transitions. Word has length 55 [2019-11-06 18:48:47,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:47,989 INFO L462 AbstractCegarLoop]: Abstraction has 172 states and 196 transitions. [2019-11-06 18:48:47,989 INFO L463 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-11-06 18:48:47,989 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 196 transitions. [2019-11-06 18:48:47,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2019-11-06 18:48:47,990 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:47,990 INFO L410 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:48,195 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:48,196 INFO L410 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:48,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:48,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1244091797, now seen corresponding path program 22 times [2019-11-06 18:48:48,197 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:48,197 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847261522] [2019-11-06 18:48:48,197 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:48,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:48,527 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:48,527 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847261522] [2019-11-06 18:48:48,528 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399007678] [2019-11-06 18:48:48,528 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:48,582 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:48:48,582 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:48,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 24 conjunts are in the unsatisfiable core [2019-11-06 18:48:48,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:48,599 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:48,599 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 27 [2019-11-06 18:48:48,599 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067794398] [2019-11-06 18:48:48,599 INFO L442 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-11-06 18:48:48,600 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:48,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-11-06 18:48:48,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:48:48,600 INFO L87 Difference]: Start difference. First operand 172 states and 196 transitions. Second operand 27 states. [2019-11-06 18:48:49,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:49,161 INFO L93 Difference]: Finished difference Result 302 states and 352 transitions. [2019-11-06 18:48:49,161 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-11-06 18:48:49,161 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 57 [2019-11-06 18:48:49,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:49,162 INFO L225 Difference]: With dead ends: 302 [2019-11-06 18:48:49,162 INFO L226 Difference]: Without dead ends: 181 [2019-11-06 18:48:49,163 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2019-11-06 18:48:49,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2019-11-06 18:48:49,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2019-11-06 18:48:49,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2019-11-06 18:48:49,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 204 transitions. [2019-11-06 18:48:49,173 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 204 transitions. Word has length 57 [2019-11-06 18:48:49,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:49,173 INFO L462 AbstractCegarLoop]: Abstraction has 179 states and 204 transitions. [2019-11-06 18:48:49,173 INFO L463 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-11-06 18:48:49,174 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 204 transitions. [2019-11-06 18:48:49,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-11-06 18:48:49,174 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:49,174 INFO L410 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:49,377 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:49,377 INFO L410 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:49,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:49,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1689120439, now seen corresponding path program 23 times [2019-11-06 18:48:49,378 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:49,378 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928654070] [2019-11-06 18:48:49,378 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:49,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:49,712 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:49,713 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928654070] [2019-11-06 18:48:49,713 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166440314] [2019-11-06 18:48:49,713 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:50,011 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-11-06 18:48:50,012 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:50,014 INFO L256 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 25 conjunts are in the unsatisfiable core [2019-11-06 18:48:50,015 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:50,030 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:50,031 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 28 [2019-11-06 18:48:50,031 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604665076] [2019-11-06 18:48:50,031 INFO L442 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-11-06 18:48:50,031 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:50,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-11-06 18:48:50,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:48:50,032 INFO L87 Difference]: Start difference. First operand 179 states and 204 transitions. Second operand 28 states. [2019-11-06 18:48:50,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:50,841 INFO L93 Difference]: Finished difference Result 314 states and 366 transitions. [2019-11-06 18:48:50,841 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-11-06 18:48:50,842 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 59 [2019-11-06 18:48:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:50,844 INFO L225 Difference]: With dead ends: 314 [2019-11-06 18:48:50,844 INFO L226 Difference]: Without dead ends: 188 [2019-11-06 18:48:50,845 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2019-11-06 18:48:50,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2019-11-06 18:48:50,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2019-11-06 18:48:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2019-11-06 18:48:50,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 212 transitions. [2019-11-06 18:48:50,856 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 212 transitions. Word has length 59 [2019-11-06 18:48:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:50,857 INFO L462 AbstractCegarLoop]: Abstraction has 186 states and 212 transitions. [2019-11-06 18:48:50,857 INFO L463 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-11-06 18:48:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 212 transitions. [2019-11-06 18:48:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-11-06 18:48:50,858 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:50,858 INFO L410 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:51,064 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:51,064 INFO L410 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:51,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:51,064 INFO L82 PathProgramCache]: Analyzing trace with hash 135084199, now seen corresponding path program 24 times [2019-11-06 18:48:51,065 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:51,065 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275073720] [2019-11-06 18:48:51,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:51,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:51,417 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:51,417 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275073720] [2019-11-06 18:48:51,417 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134192714] [2019-11-06 18:48:51,418 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:52,385 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-11-06 18:48:52,385 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:52,389 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 26 conjunts are in the unsatisfiable core [2019-11-06 18:48:52,390 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:52,404 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:52,405 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27] total 29 [2019-11-06 18:48:52,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736934163] [2019-11-06 18:48:52,405 INFO L442 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-11-06 18:48:52,405 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:52,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-11-06 18:48:52,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-11-06 18:48:52,407 INFO L87 Difference]: Start difference. First operand 186 states and 212 transitions. Second operand 29 states. [2019-11-06 18:48:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:53,069 INFO L93 Difference]: Finished difference Result 326 states and 380 transitions. [2019-11-06 18:48:53,069 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-11-06 18:48:53,070 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 61 [2019-11-06 18:48:53,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:53,071 INFO L225 Difference]: With dead ends: 326 [2019-11-06 18:48:53,071 INFO L226 Difference]: Without dead ends: 195 [2019-11-06 18:48:53,071 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2019-11-06 18:48:53,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-11-06 18:48:53,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2019-11-06 18:48:53,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-11-06 18:48:53,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 220 transitions. [2019-11-06 18:48:53,085 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 220 transitions. Word has length 61 [2019-11-06 18:48:53,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:53,086 INFO L462 AbstractCegarLoop]: Abstraction has 193 states and 220 transitions. [2019-11-06 18:48:53,086 INFO L463 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-11-06 18:48:53,086 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 220 transitions. [2019-11-06 18:48:53,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-11-06 18:48:53,087 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:53,087 INFO L410 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:53,294 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:53,294 INFO L410 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:53,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:53,295 INFO L82 PathProgramCache]: Analyzing trace with hash 849084549, now seen corresponding path program 25 times [2019-11-06 18:48:53,295 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:53,295 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43734372] [2019-11-06 18:48:53,295 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:53,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:53,636 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:53,637 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43734372] [2019-11-06 18:48:53,637 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476792604] [2019-11-06 18:48:53,637 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:53,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:53,710 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 27 conjunts are in the unsatisfiable core [2019-11-06 18:48:53,712 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:53,730 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:53,730 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:53,730 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 30 [2019-11-06 18:48:53,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82977544] [2019-11-06 18:48:53,731 INFO L442 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-11-06 18:48:53,731 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:53,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-11-06 18:48:53,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:48:53,732 INFO L87 Difference]: Start difference. First operand 193 states and 220 transitions. Second operand 30 states. [2019-11-06 18:48:54,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:54,343 INFO L93 Difference]: Finished difference Result 338 states and 394 transitions. [2019-11-06 18:48:54,344 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-11-06 18:48:54,344 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 63 [2019-11-06 18:48:54,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:54,346 INFO L225 Difference]: With dead ends: 338 [2019-11-06 18:48:54,346 INFO L226 Difference]: Without dead ends: 202 [2019-11-06 18:48:54,347 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2019-11-06 18:48:54,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2019-11-06 18:48:54,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 200. [2019-11-06 18:48:54,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2019-11-06 18:48:54,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 228 transitions. [2019-11-06 18:48:54,355 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 228 transitions. Word has length 63 [2019-11-06 18:48:54,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:54,355 INFO L462 AbstractCegarLoop]: Abstraction has 200 states and 228 transitions. [2019-11-06 18:48:54,355 INFO L463 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-11-06 18:48:54,356 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 228 transitions. [2019-11-06 18:48:54,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2019-11-06 18:48:54,356 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:54,356 INFO L410 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:54,560 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:54,560 INFO L410 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:54,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:54,561 INFO L82 PathProgramCache]: Analyzing trace with hash -191346461, now seen corresponding path program 26 times [2019-11-06 18:48:54,561 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:54,561 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354641404] [2019-11-06 18:48:54,561 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:54,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:54,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:54,955 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354641404] [2019-11-06 18:48:54,956 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891220922] [2019-11-06 18:48:54,956 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:55,042 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:48:55,042 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:55,044 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2019-11-06 18:48:55,045 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:55,081 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:55,081 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29] total 31 [2019-11-06 18:48:55,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479012392] [2019-11-06 18:48:55,082 INFO L442 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-11-06 18:48:55,082 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:55,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-11-06 18:48:55,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:48:55,083 INFO L87 Difference]: Start difference. First operand 200 states and 228 transitions. Second operand 31 states. [2019-11-06 18:48:55,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:55,720 INFO L93 Difference]: Finished difference Result 350 states and 408 transitions. [2019-11-06 18:48:55,728 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-11-06 18:48:55,728 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 65 [2019-11-06 18:48:55,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:55,729 INFO L225 Difference]: With dead ends: 350 [2019-11-06 18:48:55,729 INFO L226 Difference]: Without dead ends: 209 [2019-11-06 18:48:55,730 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2019-11-06 18:48:55,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2019-11-06 18:48:55,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2019-11-06 18:48:55,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2019-11-06 18:48:55,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 236 transitions. [2019-11-06 18:48:55,738 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 236 transitions. Word has length 65 [2019-11-06 18:48:55,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:55,738 INFO L462 AbstractCegarLoop]: Abstraction has 207 states and 236 transitions. [2019-11-06 18:48:55,738 INFO L463 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-11-06 18:48:55,738 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 236 transitions. [2019-11-06 18:48:55,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-11-06 18:48:55,739 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:55,739 INFO L410 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:55,942 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:55,942 INFO L410 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:55,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:55,943 INFO L82 PathProgramCache]: Analyzing trace with hash 681832897, now seen corresponding path program 27 times [2019-11-06 18:48:55,943 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:55,943 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386904944] [2019-11-06 18:48:55,943 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:55,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:56,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:56,325 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:56,325 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386904944] [2019-11-06 18:48:56,325 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086810511] [2019-11-06 18:48:56,325 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:56,634 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2019-11-06 18:48:56,635 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:56,637 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 29 conjunts are in the unsatisfiable core [2019-11-06 18:48:56,638 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:56,654 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:56,655 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:56,655 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 32 [2019-11-06 18:48:56,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17261333] [2019-11-06 18:48:56,655 INFO L442 AbstractCegarLoop]: Interpolant automaton has 32 states [2019-11-06 18:48:56,655 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:56,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2019-11-06 18:48:56,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:48:56,656 INFO L87 Difference]: Start difference. First operand 207 states and 236 transitions. Second operand 32 states. [2019-11-06 18:48:57,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:57,389 INFO L93 Difference]: Finished difference Result 362 states and 422 transitions. [2019-11-06 18:48:57,390 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-11-06 18:48:57,390 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 67 [2019-11-06 18:48:57,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:57,392 INFO L225 Difference]: With dead ends: 362 [2019-11-06 18:48:57,392 INFO L226 Difference]: Without dead ends: 216 [2019-11-06 18:48:57,394 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2019-11-06 18:48:57,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2019-11-06 18:48:57,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 214. [2019-11-06 18:48:57,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2019-11-06 18:48:57,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 244 transitions. [2019-11-06 18:48:57,402 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 244 transitions. Word has length 67 [2019-11-06 18:48:57,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:57,402 INFO L462 AbstractCegarLoop]: Abstraction has 214 states and 244 transitions. [2019-11-06 18:48:57,402 INFO L463 AbstractCegarLoop]: Interpolant automaton has 32 states. [2019-11-06 18:48:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 244 transitions. [2019-11-06 18:48:57,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-11-06 18:48:57,403 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:57,403 INFO L410 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:57,607 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:57,607 INFO L410 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:57,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:57,607 INFO L82 PathProgramCache]: Analyzing trace with hash -2006394081, now seen corresponding path program 28 times [2019-11-06 18:48:57,607 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:57,608 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075007865] [2019-11-06 18:48:57,608 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:58,029 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075007865] [2019-11-06 18:48:58,030 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404576303] [2019-11-06 18:48:58,030 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:58,093 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:48:58,094 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:48:58,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 30 conjunts are in the unsatisfiable core [2019-11-06 18:48:58,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:48:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:58,115 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:48:58,115 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31] total 33 [2019-11-06 18:48:58,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790828898] [2019-11-06 18:48:58,116 INFO L442 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-11-06 18:48:58,116 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:48:58,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-11-06 18:48:58,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 18:48:58,117 INFO L87 Difference]: Start difference. First operand 214 states and 244 transitions. Second operand 33 states. [2019-11-06 18:48:58,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:48:58,705 INFO L93 Difference]: Finished difference Result 374 states and 436 transitions. [2019-11-06 18:48:58,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-11-06 18:48:58,706 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 69 [2019-11-06 18:48:58,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:48:58,708 INFO L225 Difference]: With dead ends: 374 [2019-11-06 18:48:58,708 INFO L226 Difference]: Without dead ends: 223 [2019-11-06 18:48:58,709 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2019-11-06 18:48:58,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-11-06 18:48:58,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2019-11-06 18:48:58,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-11-06 18:48:58,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 252 transitions. [2019-11-06 18:48:58,720 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 252 transitions. Word has length 69 [2019-11-06 18:48:58,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:48:58,721 INFO L462 AbstractCegarLoop]: Abstraction has 221 states and 252 transitions. [2019-11-06 18:48:58,721 INFO L463 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-11-06 18:48:58,721 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 252 transitions. [2019-11-06 18:48:58,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-11-06 18:48:58,721 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:48:58,722 INFO L410 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:48:58,924 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:48:58,925 INFO L410 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:48:58,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:48:58,925 INFO L82 PathProgramCache]: Analyzing trace with hash 177792253, now seen corresponding path program 29 times [2019-11-06 18:48:58,925 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:48:58,926 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71435241] [2019-11-06 18:48:58,926 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:48:58,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:48:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:48:59,382 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71435241] [2019-11-06 18:48:59,382 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974375020] [2019-11-06 18:48:59,382 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:00,038 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2019-11-06 18:49:00,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:00,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 31 conjunts are in the unsatisfiable core [2019-11-06 18:49:00,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:00,072 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:00,073 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:00,073 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 34 [2019-11-06 18:49:00,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814689290] [2019-11-06 18:49:00,073 INFO L442 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-11-06 18:49:00,073 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:00,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-11-06 18:49:00,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 18:49:00,074 INFO L87 Difference]: Start difference. First operand 221 states and 252 transitions. Second operand 34 states. [2019-11-06 18:49:00,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:00,676 INFO L93 Difference]: Finished difference Result 386 states and 450 transitions. [2019-11-06 18:49:00,676 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2019-11-06 18:49:00,676 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 71 [2019-11-06 18:49:00,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:00,678 INFO L225 Difference]: With dead ends: 386 [2019-11-06 18:49:00,678 INFO L226 Difference]: Without dead ends: 230 [2019-11-06 18:49:00,680 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2019-11-06 18:49:00,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2019-11-06 18:49:00,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 228. [2019-11-06 18:49:00,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2019-11-06 18:49:00,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 260 transitions. [2019-11-06 18:49:00,687 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 260 transitions. Word has length 71 [2019-11-06 18:49:00,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:00,687 INFO L462 AbstractCegarLoop]: Abstraction has 228 states and 260 transitions. [2019-11-06 18:49:00,687 INFO L463 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-11-06 18:49:00,688 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 260 transitions. [2019-11-06 18:49:00,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-11-06 18:49:00,688 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:00,688 INFO L410 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:00,893 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:00,894 INFO L410 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:00,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:00,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1058148517, now seen corresponding path program 30 times [2019-11-06 18:49:00,895 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:00,895 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390263859] [2019-11-06 18:49:00,895 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:01,324 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:01,324 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390263859] [2019-11-06 18:49:01,324 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906543899] [2019-11-06 18:49:01,324 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:02,465 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2019-11-06 18:49:02,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:02,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 32 conjunts are in the unsatisfiable core [2019-11-06 18:49:02,470 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:02,494 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:02,495 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:02,495 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33] total 35 [2019-11-06 18:49:02,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500727003] [2019-11-06 18:49:02,495 INFO L442 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-11-06 18:49:02,496 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:02,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-11-06 18:49:02,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:49:02,497 INFO L87 Difference]: Start difference. First operand 228 states and 260 transitions. Second operand 35 states. [2019-11-06 18:49:03,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:03,339 INFO L93 Difference]: Finished difference Result 398 states and 464 transitions. [2019-11-06 18:49:03,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-11-06 18:49:03,340 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 73 [2019-11-06 18:49:03,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:03,341 INFO L225 Difference]: With dead ends: 398 [2019-11-06 18:49:03,341 INFO L226 Difference]: Without dead ends: 237 [2019-11-06 18:49:03,343 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2019-11-06 18:49:03,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2019-11-06 18:49:03,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 235. [2019-11-06 18:49:03,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2019-11-06 18:49:03,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 268 transitions. [2019-11-06 18:49:03,351 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 268 transitions. Word has length 73 [2019-11-06 18:49:03,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:03,352 INFO L462 AbstractCegarLoop]: Abstraction has 235 states and 268 transitions. [2019-11-06 18:49:03,352 INFO L463 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-11-06 18:49:03,352 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 268 transitions. [2019-11-06 18:49:03,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2019-11-06 18:49:03,353 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:03,353 INFO L410 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:03,558 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:03,559 INFO L410 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:03,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:03,559 INFO L82 PathProgramCache]: Analyzing trace with hash 908712505, now seen corresponding path program 31 times [2019-11-06 18:49:03,560 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:03,560 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724118474] [2019-11-06 18:49:03,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:04,004 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724118474] [2019-11-06 18:49:04,004 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44223308] [2019-11-06 18:49:04,004 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:04,076 INFO L256 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 33 conjunts are in the unsatisfiable core [2019-11-06 18:49:04,077 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:04,091 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:04,092 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:04,092 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 36 [2019-11-06 18:49:04,092 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525631895] [2019-11-06 18:49:04,092 INFO L442 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-11-06 18:49:04,093 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:04,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-11-06 18:49:04,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:49:04,094 INFO L87 Difference]: Start difference. First operand 235 states and 268 transitions. Second operand 36 states. [2019-11-06 18:49:04,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:04,927 INFO L93 Difference]: Finished difference Result 410 states and 478 transitions. [2019-11-06 18:49:04,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2019-11-06 18:49:04,928 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 75 [2019-11-06 18:49:04,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:04,929 INFO L225 Difference]: With dead ends: 410 [2019-11-06 18:49:04,929 INFO L226 Difference]: Without dead ends: 244 [2019-11-06 18:49:04,930 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2019-11-06 18:49:04,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2019-11-06 18:49:04,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 242. [2019-11-06 18:49:04,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2019-11-06 18:49:04,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 276 transitions. [2019-11-06 18:49:04,938 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 276 transitions. Word has length 75 [2019-11-06 18:49:04,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:04,939 INFO L462 AbstractCegarLoop]: Abstraction has 242 states and 276 transitions. [2019-11-06 18:49:04,939 INFO L463 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-11-06 18:49:04,939 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 276 transitions. [2019-11-06 18:49:04,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2019-11-06 18:49:04,939 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:04,940 INFO L410 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:05,142 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:05,143 INFO L410 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:05,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:05,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1276544407, now seen corresponding path program 32 times [2019-11-06 18:49:05,143 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:05,143 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223926154] [2019-11-06 18:49:05,143 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:05,645 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223926154] [2019-11-06 18:49:05,645 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340977581] [2019-11-06 18:49:05,645 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:05,716 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-11-06 18:49:05,717 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:05,718 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 34 conjunts are in the unsatisfiable core [2019-11-06 18:49:05,720 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:05,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:05,745 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:05,745 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 37 [2019-11-06 18:49:05,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811487108] [2019-11-06 18:49:05,746 INFO L442 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-11-06 18:49:05,746 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:05,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-11-06 18:49:05,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-11-06 18:49:05,747 INFO L87 Difference]: Start difference. First operand 242 states and 276 transitions. Second operand 37 states. [2019-11-06 18:49:06,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:06,452 INFO L93 Difference]: Finished difference Result 422 states and 492 transitions. [2019-11-06 18:49:06,452 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-11-06 18:49:06,452 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 77 [2019-11-06 18:49:06,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:06,454 INFO L225 Difference]: With dead ends: 422 [2019-11-06 18:49:06,454 INFO L226 Difference]: Without dead ends: 251 [2019-11-06 18:49:06,455 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2019-11-06 18:49:06,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2019-11-06 18:49:06,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 249. [2019-11-06 18:49:06,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2019-11-06 18:49:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 284 transitions. [2019-11-06 18:49:06,463 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 284 transitions. Word has length 77 [2019-11-06 18:49:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:06,463 INFO L462 AbstractCegarLoop]: Abstraction has 249 states and 284 transitions. [2019-11-06 18:49:06,463 INFO L463 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-11-06 18:49:06,463 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 284 transitions. [2019-11-06 18:49:06,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-11-06 18:49:06,464 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:06,464 INFO L410 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:06,667 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:06,667 INFO L410 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:06,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:06,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1719283339, now seen corresponding path program 33 times [2019-11-06 18:49:06,669 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:06,669 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643248311] [2019-11-06 18:49:06,669 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:07,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:07,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:07,465 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643248311] [2019-11-06 18:49:07,466 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030725978] [2019-11-06 18:49:07,466 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:08,263 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2019-11-06 18:49:08,263 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:08,265 INFO L256 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2019-11-06 18:49:08,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:08,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:08,284 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:08,284 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 38 [2019-11-06 18:49:08,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108457517] [2019-11-06 18:49:08,285 INFO L442 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-11-06 18:49:08,285 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:08,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-11-06 18:49:08,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 18:49:08,286 INFO L87 Difference]: Start difference. First operand 249 states and 284 transitions. Second operand 38 states. [2019-11-06 18:49:09,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:09,104 INFO L93 Difference]: Finished difference Result 434 states and 506 transitions. [2019-11-06 18:49:09,104 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2019-11-06 18:49:09,105 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 79 [2019-11-06 18:49:09,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:09,107 INFO L225 Difference]: With dead ends: 434 [2019-11-06 18:49:09,107 INFO L226 Difference]: Without dead ends: 258 [2019-11-06 18:49:09,109 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2019-11-06 18:49:09,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2019-11-06 18:49:09,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2019-11-06 18:49:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2019-11-06 18:49:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 292 transitions. [2019-11-06 18:49:09,118 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 292 transitions. Word has length 79 [2019-11-06 18:49:09,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:09,118 INFO L462 AbstractCegarLoop]: Abstraction has 256 states and 292 transitions. [2019-11-06 18:49:09,118 INFO L463 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-11-06 18:49:09,118 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 292 transitions. [2019-11-06 18:49:09,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-11-06 18:49:09,119 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:09,119 INFO L410 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:09,324 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:09,324 INFO L410 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:09,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:09,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1213308371, now seen corresponding path program 34 times [2019-11-06 18:49:09,325 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:09,325 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093200137] [2019-11-06 18:49:09,326 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:09,882 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093200137] [2019-11-06 18:49:09,882 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064501545] [2019-11-06 18:49:09,882 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:09,958 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-06 18:49:09,958 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:09,960 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 36 conjunts are in the unsatisfiable core [2019-11-06 18:49:09,962 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:09,979 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:09,979 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37] total 39 [2019-11-06 18:49:09,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842596634] [2019-11-06 18:49:09,980 INFO L442 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-11-06 18:49:09,980 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:09,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-11-06 18:49:09,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 18:49:09,981 INFO L87 Difference]: Start difference. First operand 256 states and 292 transitions. Second operand 39 states. [2019-11-06 18:49:10,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:10,820 INFO L93 Difference]: Finished difference Result 446 states and 520 transitions. [2019-11-06 18:49:10,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-11-06 18:49:10,820 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 81 [2019-11-06 18:49:10,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:10,822 INFO L225 Difference]: With dead ends: 446 [2019-11-06 18:49:10,823 INFO L226 Difference]: Without dead ends: 265 [2019-11-06 18:49:10,824 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2019-11-06 18:49:10,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2019-11-06 18:49:10,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 263. [2019-11-06 18:49:10,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 263 states. [2019-11-06 18:49:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 300 transitions. [2019-11-06 18:49:10,832 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 300 transitions. Word has length 81 [2019-11-06 18:49:10,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:10,833 INFO L462 AbstractCegarLoop]: Abstraction has 263 states and 300 transitions. [2019-11-06 18:49:10,833 INFO L463 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-11-06 18:49:10,833 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 300 transitions. [2019-11-06 18:49:10,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2019-11-06 18:49:10,834 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:10,834 INFO L410 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:11,037 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:11,037 INFO L410 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:11,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:11,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1935395505, now seen corresponding path program 35 times [2019-11-06 18:49:11,037 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:11,038 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972409928] [2019-11-06 18:49:11,038 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:11,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 18:49:11,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:11,614 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972409928] [2019-11-06 18:49:11,614 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965606514] [2019-11-06 18:49:11,614 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:12,820 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2019-11-06 18:49:12,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-06 18:49:12,823 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 37 conjunts are in the unsatisfiable core [2019-11-06 18:49:12,825 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 18:49:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 18:49:12,841 INFO L218 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-11-06 18:49:12,841 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 40 [2019-11-06 18:49:12,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747838839] [2019-11-06 18:49:12,842 INFO L442 AbstractCegarLoop]: Interpolant automaton has 40 states [2019-11-06 18:49:12,842 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2019-11-06 18:49:12,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2019-11-06 18:49:12,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:49:12,843 INFO L87 Difference]: Start difference. First operand 263 states and 300 transitions. Second operand 40 states. [2019-11-06 18:49:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 18:49:13,637 INFO L93 Difference]: Finished difference Result 458 states and 534 transitions. [2019-11-06 18:49:13,638 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2019-11-06 18:49:13,638 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 83 [2019-11-06 18:49:13,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 18:49:13,640 INFO L225 Difference]: With dead ends: 458 [2019-11-06 18:49:13,641 INFO L226 Difference]: Without dead ends: 272 [2019-11-06 18:49:13,643 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2019-11-06 18:49:13,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2019-11-06 18:49:13,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 270. [2019-11-06 18:49:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2019-11-06 18:49:13,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 308 transitions. [2019-11-06 18:49:13,655 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 308 transitions. Word has length 83 [2019-11-06 18:49:13,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 18:49:13,655 INFO L462 AbstractCegarLoop]: Abstraction has 270 states and 308 transitions. [2019-11-06 18:49:13,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 40 states. [2019-11-06 18:49:13,655 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 308 transitions. [2019-11-06 18:49:13,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2019-11-06 18:49:13,656 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 18:49:13,657 INFO L410 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 18:49:13,864 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-06 18:49:13,865 INFO L410 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 18:49:13,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 18:49:13,865 INFO L82 PathProgramCache]: Analyzing trace with hash 76429327, now seen corresponding path program 36 times [2019-11-06 18:49:13,865 INFO L161 FreeRefinementEngine]: Executing refinement strategy CAMEL [2019-11-06 18:49:13,866 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876300360] [2019-11-06 18:49:13,866 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 18:49:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat